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As filed with the Securities and Exchange Commission on November 4, 2011

Registration No. 333-            

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-4

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

W&T OFFSHORE, INC.

(Exact Name of Registrant as Specified in Its Charter)

Nine Greenway Plaza, Suite 300

Houston, Texas 77046

(713) 626-8525

(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices)

Thomas F. Getten

Vice President, General Counsel and Assistant Secretary

Nine Greenway Plaza, Suite 300

Houston, Texas 77046

(713) 626-8525

(Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent For Service)

Copies to:

James M. Prince

Vinson & Elkins L.L.P.

1001 Fannin, Suite 2500

Houston, Texas 77002-6760

(713) 758-2222

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after the effective date of this Registration Statement.

If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box.  ¨

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

If applicable, place an X in the box to designate the appropriate rule provision relied upon in conducting this transaction:

Exchange Act Rule 13e-4(i) (Cross-Border Issue Tender Offer)  ¨

Exchange Act Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)  ¨

CALCULATION OF REGISTRATION FEE

Each registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

TABLE OF ADDITIONAL REGISTRANT GUARANTORS

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The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offering is not permitted.

SUBJECT TO COMPLETION, DATED NOVEMBER 4, 2011

PROSPECTUS

Offer to Exchange

Up To $600,000,000 of

8.500% Senior Notes due 2019

That Have Not Been Registered Under

The Securities Act of 1933

For

Up To $600,000,000 of

8.500% Senior Notes due 2019

That Have Been Registered Under

The Securities Act of 1933

Terms of the New 8.500% Senior Notes due 2019 Offered in the Exchange Offer:

Terms of the Exchange Offer:

You should carefully consider the risk factors beginning on page 8 of this prospectus before participating in the exchange offer.

Each broker-dealer that receives new notes for its own account pursuant to the exchange offer must acknowledge that it will deliver a prospectus in connection with any resale of such new notes. This prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of new notes received in exchange for old notes where such old notes were acquired by such broker-dealer as a result of market-making activities or other trading activities. Please read “Plan of Distribution.”

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is                     , 2011

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This prospectus is part of a registration statement we filed with the Securities and Exchange Commission. In making your investment decision, you should rely only on the information contained or incorporated by reference in this prospectus and in the accompanying letter of transmittal. We have not authorized anyone to provide you with any other information. We are not making an offer to sell these securities or soliciting an offer to buy these securities in any jurisdiction where an offer or solicitation is not authorized or in which the person making that offer or solicitation is not qualified to do so or to anyone whom it is unlawful to make an offer or solicitation. You should not assume that the information contained in this prospectus, as well as the information we previously filed with the Securities and Exchange Commission that is incorporated by reference herein, is accurate as of any date other than its respective date.

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In this prospectus, “we,” “us,” “our,” the “Company,” and “W&T” refer to W&T Offshore, Inc. and its subsidiaries, unless otherwise indicated or the context otherwise requires.

This prospectus incorporates important business and financial information about us that is not included or delivered with this prospectus. Such information is available without charge to holders of old notes upon written or oral request made to W&T Offshore, Inc., Nine Greenway Plaza, Suite 300, Houston, TX 77046 (Telephone: (713) 626-8525). To obtain timely delivery of any requested information, holders of old notes must make any request no later than five business days prior to the expiration of the exchange offer.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

Certain information included or incorporated by reference in this prospectus may be deemed to be forward-looking statements. Where any forward-looking statement includes a statement of the assumptions or bases underlying the forward-looking statement, we caution that, while we believe these assumptions or bases to be reasonable and made in good faith, assumed facts or bases almost always vary from the actual results, and the differences between assumed facts or bases and actual results can be material, depending upon the circumstances. Where, in any forward-looking statement, we or our management express an expectation or belief as to future results, such expectation or belief is expressed in good faith and is believed to have a reasonable basis. We cannot assure you, however, that the statement of expectation or belief will result or be achieved or accomplished. These statements relate to analyses and other information which are based on forecasts of future results and estimates of amounts not yet determinable. These statements also relate to our future prospects, developments and business strategies. These forward-looking statements are identified by their use of terms and phrases such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “will,” and similar terms and phrases, including references to assumptions. These statements are contained in the section “Risk Factors” and other sections of this prospectus as well as the documents incorporated by reference in this prospectus. These forward looking statements involve risks and uncertainties that may cause our actual future activities and results of operations to be materially different from those suggested or described in this prospectus or the documents incorporated by reference herein. These risks include the risks that are identified in the “Risk Factors” section of this prospectus, and also include, among others, expectations regarding the following:

We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information or otherwise. If one or more of these risks or uncertainties materialize, or if underlying assumptions prove incorrect, our actual results may vary materially from those expected, estimated or projected.

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RISK FACTORS

You should carefully consider the information included or incorporated by reference in this prospectus, including the matters addressed under “Cautionary Statement Regarding Forward-Looking Statements,” and the following risks before deciding to participate in the exchange offer. In addition, you should read the risk factors in our Annual Report on Form 10-K for the year ended December 31, 2010, which is incorporated by reference in this prospectus and, to the extent applicable, any subsequently filed Quarterly Reports on Form 10-Q or Current Reports on Form 8-K.

Risks Relating to the Notes

If you do not properly tender your old notes, you will continue to hold unregistered old notes and your ability to transfer old notes will remain restricted and may be adversely affected.

We will only issue new notes in exchange for old notes that you timely and properly tender. Therefore, you should allow sufficient time to ensure timely delivery of the old notes and you should carefully follow the instructions on how to tender your old notes. Neither we nor the exchange agent is required to tell you of any defects or irregularities with respect to your tender of old notes.

If you do not exchange your old notes for new notes pursuant to the exchange offer, the old notes you hold will continue to be subject to the existing transfer restrictions. In general, you may not offer or sell the old notes except under an exemption from, or in a transaction not subject to, the Securities Act and applicable state securities laws. We do not plan to register old notes under the Securities Act unless our registration rights agreement with the initial purchasers of the old notes requires us to do so. Further, if you continue to hold any old notes after the exchange offer is consummated, you may have trouble selling them because there will be fewer of these notes outstanding.

We may not be able to generate enough cash flow to meet our debt obligations.

We expect our earnings and cash flow to vary significantly from year to year due to the cyclical nature of our industry. As a result, the amount of debt that we can manage in some periods may not be appropriate for us in other periods. In addition, our future cash flow may be insufficient to meet our debt obligations and commitments, including the notes. Any insufficiency could negatively impact our business. A range of economic, competitive, business and industry factors will affect our future financial performance, and, as a result, our ability to generate cash flow from operations and to pay our debt, including the notes. Many of these factors, such as oil and gas prices, economic and financial conditions in our industry and the global economy or competitive initiatives of our competitors, are beyond our control.

If we do not generate enough cash flow from operations to satisfy our debt obligations, we may have to undertake alternative financing plans, such as:

However, any alternative financing plans that we undertake, if necessary, may not allow us to meet our debt obligations. Our inability to generate sufficient cash flow to satisfy our debt obligations, including our obligations under the notes, or to obtain alternative financing, could materially and adversely affect our business, financial condition, results of operations and prospects.

Our debt could have important consequences to you. For example, it could:

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In addition, if we fail to comply with the covenants or other terms of any agreements governing our debt, our lenders will have the right to accelerate the maturity of that debt and foreclose upon the collateral, if any, securing that debt. Realization of any of these factors could adversely affect our financial condition.

The notes and the guarantees are unsecured and effectively subordinated to our existing secured indebtedness and any future secured indebtedness.

The notes and the guarantees are general unsecured senior obligations ranking effectively junior in right of payment to all existing and future secured debt of ours and that of each subsidiary guarantor, including obligations under our Credit Agreement, to the extent of the value of the collateral securing the debt.

If we or a subsidiary guarantor is declared bankrupt, becomes insolvent or is liquidated or reorganized, any secured debt of ours or that subsidiary guarantor will be entitled to be paid in full from our assets or the assets of the guarantor, as applicable, securing that debt before any payment may be made with respect to the notes or the affected guarantees. Holders of the notes will participate ratably in our remaining assets with all holders of our unsecured indebtedness that does not rank junior to the notes, including all of our other general creditors, based upon the respective amounts owed to each holder or creditor. In any of the foregoing events, there may not be sufficient assets to pay amounts due on the notes. As a result, holders of the notes would likely receive less, on a ratable basis, than holders of secured indebtedness.

We may be able to incur substantially more debt. This could exacerbate the risks associated with our indebtedness.

We and our subsidiaries may be able to incur substantial additional indebtedness in the future. The terms of our indenture do not prohibit us or our subsidiaries from doing so. As of June 30, 2011, we and our subsidiary guarantors had $75 million of secured debt outstanding and we had an additional $412 million available for future borrowings under our Credit Agreement.

These borrowings would be secured, and as a result, effectively senior to the notes and the guarantees of the notes by our subsidiary guarantors, to the extent of the value of the collateral securing that indebtedness. If we incur any additional indebtedness that ranks equally with the notes, the holders of that debt will be entitled to share ratably with the holders of these notes in any proceeds distributed in connection with any insolvency, liquidation, reorganization, dissolution or other winding-up of us. This may have the effect of reducing the amount of proceeds paid to you.

If new debt is added to our current debt levels, the related risks that we and our subsidiaries now face could intensify. Our level of indebtedness may prevent us from engaging in certain transactions that might otherwise be beneficial to us by limiting our ability to obtain additional financing, limiting our flexibility in operating our business or otherwise. In addition, we could be at a competitive disadvantage against other less leveraged competitors that have more cash flow to devote to their business. Any of these factors could result in a material adverse effect on our business, financial condition, results of operations, business prospects and ability to satisfy our obligations under the notes.

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Restrictions in our existing and future debt agreements could limit our growth and our ability to respond to changing conditions.

The indenture governing the notes and our Credit Agreement contain, and agreements governing our future indebtedness may contain, a number of significant covenants in addition to covenants restricting the incurrence of additional debt. These covenants limit our ability and the ability of our restricted subsidiaries, among other things, to:

Our Credit Agreement requires us, among other things, to maintain certain financial ratios, satisfy certain financial condition tests or reduce our debt. These restrictions may also limit our ability to obtain future financings, withstand a future downturn in our business or the economy in general, or otherwise conduct necessary corporate activities. We may also be prevented from taking advantage of business opportunities that arise because of the limitations that the restrictive covenants under the indenture governing the notes and the Credit Agreement impose on us.

A breach of any covenant in the indenture governing the notes and our Credit Agreement would result in a default under that agreement after any applicable grace periods. A default, if not waived, could result in acceleration of the debt outstanding under the agreement and in a default with respect to, and acceleration of, the debt outstanding under any other debt agreement. The accelerated debt would become immediately due and payable. If that should occur, we may not be able to make all of the required payments or borrow sufficient funds to refinance it. Even if new financing were then available, it may not be on terms that are acceptable to us. See “Description of the Notes—Events of Default and Remedies.”

We may not be able to repurchase the notes upon a change of control.

If we experience certain kinds of changes of control, we must give holders of the notes the opportunity to sell us their notes at 101% of their principal amount, plus accrued and unpaid interest. However, in such an event, we might not be able to pay you the required repurchase price for the notes you present to us because we might not have sufficient funds available at that time, or the terms of our Credit Agreement or other agreements we may enter into in the future may prevent us from applying funds to repurchase the notes. The source of funds for any repurchase required as a result of a change of control will be our available cash or cash generated from our oil and gas operations or other sources, including:

Sufficient funds may not be available at the time of any change of control to repurchase your notes after first repaying any of our senior secured debt that may exist at the time. In addition, restrictions under our Credit Agreement do not, and any future credit facilities may not, allow such repurchases. A “change of control” (as defined in the indenture for the notes) will also be an event of default under our Credit Agreement that would

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permit the lenders to accelerate the debt outstanding under the Credit Agreement. Finally, using available cash to fund the potential consequences of a change of control may impair our ability to obtain additional financing in the future, which could negatively impact our ability to conduct our business operations.

A financial failure by us or our subsidiaries may result in the assets of any or all of those entities becoming subject to the claims of all creditors of those entities.

A financial failure by us or our subsidiaries could affect payment of the notes if a bankruptcy court were to substantively consolidate us and our subsidiaries. If a bankruptcy court substantively consolidated us and our subsidiaries, the assets of each entity would be subject to the claims of creditors of all entities. This would expose you not only to the usual impairments arising from bankruptcy, but also to potential dilution of the amount ultimately recoverable because of the larger creditor base. Furthermore, forced restructuring of the notes could occur through the cram-down provision of the bankruptcy code. Under this provision, the notes could be restructured over your objections as to their general terms, primarily interest rate and maturity.

If the subsidiary guarantees are deemed fraudulent conveyances or preferential transfers, a court may subordinate or void them.

Under various fraudulent conveyance or fraudulent transfer laws, a court could subordinate or void our subsidiary guarantees. Generally, a court may void or subordinate a subsidiary guarantee in favor of the subsidiary’s other obligations if it finds that at the time the subsidiary entered into a subsidiary guarantee it:

In addition, a guarantee may be voided based on the level of benefits that the subsidiary guarantor received compared to the amount of the subsidiary guarantee. If a subsidiary guarantee is voided or held unenforceable, you would not have any claim against that subsidiary and would be creditors solely of us and any subsidiary guarantors whose guarantees are not held unenforceable. After providing for all prior claims, there may not be sufficient assets to satisfy claims of holders of notes relating to any voided portions of any of the subsidiary guarantees.

There is a risk of a preferential transfer if:

A subsidiary guarantee could be voided by a court as a preferential transfer. In addition, a court could require holders of notes to return any payments made on the notes during the 90-day (or, in certain cases, one-year) period.

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Your ability to transfer the notes may be limited by the absence of an active trading market, and there is no assurance that any active trading market will develop for the notes.

The old notes have not been registered under the Securities Act, and may not be resold by holders thereof unless the old notes are subsequently registered or an exemption from the registration requirements of the Securities Act is available. However, we cannot assure you that, even following exchange of the old notes for new notes, that an active trading market for the old notes or the new notes will exist, and we will have no obligation to create such a market. At the time of the private placement of the old notes, the initial purchasers advised us that they intended to make a market in the old notes and, if issued, the new notes. The initial purchasers are not obligated, however, to make a market in the old notes or the new notes and any market making may be discontinued at any time at their sole discretion. No assurance can be given as to the liquidity of or trading market for the old notes or the new notes.

The liquidity of any trading market for the notes and the market price quoted for the notes will depend upon the number of holders of the notes, the overall market for high yield securities, our financial performance or prospects or the prospects for companies in our industry generally, the interest of securities dealers in making a market in the notes and other factors.

Many of the covenants contained in the indenture will terminate if the notes are rated investment grade by both Standard & Poor’s and Moody’s and no default has occurred and is continuing.

Many of the covenants in the indenture governing the notes will terminate if the notes are rated investment grade by both Standard & Poor’s and Moody’s, provided at such time no default with respect to the notes has occurred and is continuing. The covenants may restrict, among other things, our ability to pay dividends, incur debt and to enter into certain other transactions. There can be no assurance that the notes will ever be rated investment grade, or that if they are rated investment grade, that the notes will maintain such ratings. However, termination of these covenants would allow us to engage in certain transactions that would not be permitted while these covenants were in force. Please see “Description of the Notes—Certain Covenants—Termination of Covenants.”

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EXCHANGE OFFER

Purpose and Effect of the Exchange Offer

At the closing of the offering of the old notes, we entered into a registration rights agreement with the initial purchasers pursuant to which we agreed, for the benefit of the holders of the old notes, at our cost, to:

Additionally, we agreed to offer to holders of the old notes the new notes in exchange for surrender of the old notes upon the SEC’s declaring the exchange offer registration statement effective. We agreed to use commercially reasonable efforts to cause the exchange offer registration statement to be effective continuously, and to keep the exchange offer open for a period of not less than 30 calendar days.

For each old note surrendered to us pursuant to the exchange offer, the holder of such old note will receive a new note having a principal amount equal to that of the surrendered old note. Interest on each new note will accrue from the last interest payment date on which interest was paid on the surrendered old note or, if no interest has been paid on such old note, from June 10, 2011. The registration rights agreement also provides an agreement to include in the prospectus for the exchange offer certain information necessary to allow a broker-dealer who holds old notes that were acquired for its own account as a result of market-making activities or other ordinary course trading activities (other than old notes acquired directly from us or one of our affiliates) to exchange such old notes pursuant to the exchange offer and to satisfy the prospectus delivery requirements in connection with resales of new notes received by such broker-dealer in the exchange offer. We agreed to use commercially reasonable efforts to maintain the effectiveness of the exchange offer registration statement for these purposes for a period ending on the earlier of 180 days from the date the exchange offer registration statement is declared effective and the date on which broker-dealers are no longer required to deliver a prospectus in connection with market-making or other trading activities.

The preceding agreement is needed because any broker-dealer who acquires old notes for its own account as a result of market-making activities or other trading activities is required to deliver a prospectus meeting the requirements of the Securities Act. This prospectus covers the offer and sale of the new notes pursuant to the exchange offer and the resale of new notes received in the exchange offer by any broker-dealer who held old notes acquired for its own account as a result of market-making activities or other trading activities other than old notes acquired directly from us or one of our affiliates.

Based on interpretations by the staff of the SEC set forth in no-action letters issued to third parties, we believe that the new notes issued pursuant to the exchange offer would in general be freely tradable after the exchange offer without further registration under the Securities Act. However, any purchaser of old notes who is an “affiliate” of ours or who intends to participate in the exchange offer for the purpose of distributing the related new notes:

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Each holder of the old notes (other than certain specified holders) who desires to exchange old notes for the new notes in the exchange offer will be required to make the representations described below under “—Procedures for Tendering—Your Representations to Us.”

We further agreed to file with the SEC a shelf registration statement to register for public resale of old notes held by any holder who provides us with certain information for inclusion in the shelf registration statement if:

We have agreed, at our expense, (i) as promptly as reasonably practicable, and in any event on or prior to the 30th calendar day after such filing obligation arises, file a shelf registration statement, (ii) to use our commercially reasonable efforts to cause the shelf registration statement to be declared effective under the Securities Act on or prior to the 120th calendar day after such filing obligation arises, and (iii) to keep effective the shelf registration statement until two years after its effective date (or such shorter period that will terminate when all the notes covered thereby have been sold pursuant thereto or in certain other circumstances).

If either (a) the exchange offer is not consummated on or prior to the 365^th calendar day following the date of issuance of the old notes, (b) a shelf registration statement applicable to the notes is not filed or declared effective when required, or (c) a registration statement applicable to the notes is declared effective as required but thereafter fails to remain effective or usable in connection with resales for more than 30 calendar days (each such event referred to in clauses (a) through (c) above, a “Registration Default”), we will pay liquidated damages in the form of additional interest in cash to each holder of notes in an amount equal to 0.25% per annum of the aggregate principal amount of notes for the period immediately following the occurrence of the Registration Default until such time as no Registration Default is in effect, which rate shall increase by 0.25% per annum for each subsequent 90-day period during which such Registration Default continues up to a maximum of 0.50% per annum. Following the cure of all Registration Defaults, such additional interest will cease to accrue and the interest rate on the notes will revert to the original rate; provided, however, that, if after the date such additional interest ceases to accrue, a different Registration Default occurs, such additional interest may again commence accruing pursuant to the foregoing provisions. All references herein to “interest” include any additional interest payable pursuant to this paragraph.

Holders of the old notes will be required to make certain representations to us (as described in the registration rights agreement) in order to participate in the exchange offer and will be required to deliver information to be used in connection with the shelf registration statement.

This summary of the material provisions of the registration rights agreement does not purport to be complete and is subject to, and is qualified in its entirety by reference to, all the provisions of the registration rights agreement, a copy of which is filed as an exhibit to the registration statement of which this prospectus is a part.

Except as set forth above, after consummation of the exchange offer, holders of old notes which are the subject of the exchange offer have no registration or exchange rights under the registration rights agreement. See “—Consequences of Failure to Exchange.”

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Terms of the Exchange Offer

Subject to the terms and conditions described in this prospectus and in the letter of transmittal, we will accept for exchange any old notes properly tendered and not withdrawn prior to 5:00 p.m. New York City time on the expiration date. We will issue new notes in principal amount equal to the principal amount of old notes surrendered in the exchange offer. Old notes may be tendered only for new notes and only in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof.

The exchange offer is not conditioned upon any minimum aggregate principal amount of old notes being tendered for exchange.

As of the date of this prospectus, $600,000,000 in aggregate principal amount of the old notes is outstanding. This prospectus and the letter of transmittal are being sent to all registered holders of old notes. There will be no fixed record date for determining registered holders of old notes entitled to participate in the exchange offer.

We intend to conduct the exchange offer in accordance with the provisions of the registration rights agreement, the applicable requirements of the Securities Act of 1933 and the Securities Exchange Act of 1934 and the rules and regulations of the SEC. Old notes that the holders thereof do not tender for exchange in the exchange offer will remain outstanding and continue to accrue interest. These old notes will continue to be entitled to the rights and benefits such holders have under the indenture relating to the notes.

We will be deemed to have accepted for exchange properly tendered old notes when we have given oral (promptly followed in writing) or written notice of the acceptance to the exchange agent and complied with the applicable provisions of the registration rights agreement. The exchange agent will act as agent for the tendering holders for the purposes of receiving the new notes from us.

If you tender old notes in the exchange offer, you will not be required to pay brokerage commissions or fees or, subject to the letter of transmittal, transfer taxes with respect to the exchange of old notes. We will pay all charges and expenses, other than certain applicable taxes described below, in connecting with the exchange offer. It is important that you read the section labeled “—Fees and Expenses” for more details regarding fees and expenses incurred in the exchange offer.

We will return any old notes that we do not accept for exchange for any reason without expense to their tendering holder promptly after the expiration or termination of the exchange offer.

Expiration Date

The exchange offer will expire at 5:00 p.m., New York City time, on , 2011, unless, in our sole discretion, we extend it.

Extensions, Delays in Acceptance, Termination or Amendment

We expressly reserve the right, at any time or various times, to extend the period of time during which the exchange offer is open. We may delay acceptance of any old notes by giving oral (promptly followed in writing) or written notice of such extension to their holders. During any such extensions, all old notes previously tendered will remain subject to the exchange offer, and we may accept them for exchange.

In order to extend the exchange offer, we will notify the exchange agent orally or in writing of any extension. We will notify the registered holders of old notes of the extension no later than 9:00 a.m., New York City time, on the business day after the previously scheduled expiration date.

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If any of the conditions described below under “—Conditions to the Exchange Offer” have not been satisfied, we reserve the right, in our sole discretion:

by giving oral or written notice of such delay, extension or termination to the exchange agent. Subject to the terms of the registration rights agreement, we also reserve the right to amend the terms of the exchange offer in any manner.

Any such delay in acceptance, extension, termination or amendment will be followed promptly by oral or written notice thereof to the registered holders of old notes. If we amend the exchange offer in a manner that we determine to constitute a material change, we will promptly disclose such amendment by means of a prospectus supplement. The supplement will be distributed to the registered holders of the old notes. Depending upon the significance of the amendment and the manner of disclosure to the registered holders, we may extend the exchange offer. In the event of a material change in the exchange offer, including the waiver by us of a material condition, we will extend the exchange offer period if necessary so that at least five business days remain in the exchange offer following notice of the material change.

Conditions to the Exchange Offer

We will not be required to accept for exchange, or exchange any new notes for, any old notes if the exchange offer, or the making of any exchange by a holder of old notes, would violate applicable law or any applicable interpretation of the staff of the SEC. Similarly, we may terminate the exchange offer as provided in this prospectus before accepting old notes for exchange in the event of such a potential violation.

In addition, we will not be obligated to accept for exchange the old notes of any holder that has not made to us the representations described under “—Purpose and Effect of the Exchange Offer,” “—Procedures for Tendering” and “Plan of Distribution” and such other representations as may be reasonably necessary under applicable SEC rules, regulations or interpretations to allow us to use an appropriate form to register the new notes under the Securities Act.

Further, we will not accept for exchange any old notes tendered, and will not issue new notes in exchange for any such old notes, if at such time any stop order has been threatened or is in effect with respect to the registration statement of which this prospectus constitutes a part or the qualification of the indenture relating to the notes under the Trust Indenture Act of 1939 (the “Trust Indenture Act”).

We expressly reserve the right to amend or terminate the exchange offer, and to reject for exchange any old notes not previously accepted for exchange, upon the occurrence of any of the conditions to the exchange offer specified above. We will give prompt oral or written notice of any extension, amendment, non-acceptance or termination to the holders of the old notes.

These conditions are for our sole benefit, and we may assert them or waive them in whole or in part at any time or at various times in our sole discretion. If we fail at any time to exercise any of these rights, this failure will not mean that we have waived our rights. Each such right will be deemed an ongoing right that we may assert at any time or at various times.

Procedures for Tendering

In order to participate in the exchange offer, you must properly tender your old notes to the exchange agent as described below. It is your responsibility to properly tender your notes. We have the right to waive any defects. However, we are not required to waive defects and are not required to notify you of defects in your tender.

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If you have any questions or need help in exchanging your notes, please call the exchange agent, whose address and phone number are set forth in “Prospectus Summary—Exchange Offer—Exchange Agent.”

All of the old notes were issued in book-entry form, and all of the old notes are currently represented by global certificates held for the account of DTC. We have confirmed with DTC that the old notes may be tendered using ATOP instituted by DTC. The exchange agent will establish an account with DTC for purposes of the exchange offer promptly after the commencement of the exchange offer, and DTC participants may electronically transmit their acceptance of the exchange offer by causing DTC to transfer their old notes to the exchange agent using the ATOP procedures. In connection with each transfer, DTC will send an “agent’s message” to the exchange agent. The agent’s message will be deemed to state that DTC has received instructions from the participant to tender old notes and that the participant agrees to be bound by the terms of the letter of transmittal.

By using the ATOP procedures to exchange old notes, you will not be required to deliver a letter of transmittal to the exchange agent. However, you will be bound by its terms just as if you had signed it.

There is no procedure for guaranteed late delivery of the notes.

Determinations Under the Exchange Offer

We will determine in our sole discretion all questions as to the validity, form, eligibility, time of receipt, acceptance of tendered old notes and withdrawal of tendered old notes. Our determination will be final and binding. We reserve the absolute right to reject any old notes not properly tendered or any old notes our acceptance of which would, in the opinion of our counsel, be unlawful. We also reserve the right to waive any defect, irregularities or conditions of tender as to particular old notes. Our interpretation of the terms and conditions of the exchange offer, including the instructions in the letter of transmittal, will be final and binding on all parties. Unless waived, all defects or irregularities in connection with tenders of old notes must be cured within such time as we shall determine. Although we intend to notify holders of defects or irregularities with respect to tenders of old notes, neither we, the exchange agent nor any other person will incur any liability for failure to give such notification. Tenders of old notes will not be deemed made until such defects or irregularities have been cured or waived. Any old notes received by the exchange agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned to the tendering holder, unless otherwise provided in the letter of transmittal, promptly following the expiration date.

When We Will Issue New Notes

In all cases, we will issue new notes for old notes that we have accepted for exchange under the exchange offer only after the exchange agent timely receives:

Return of Old Notes Not Accepted or Exchanged

If we do not accept any tendered old notes for exchange or if old notes are submitted for a greater principal amount than the holder desires to exchange, the unaccepted or non-exchanged old notes will be returned without expense to their tendering holder. Such non-exchanged old notes will be credited to an account maintained with DTC. These actions will occur promptly after the expiration or termination of the exchange offer.

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Your Representations to Us

By agreeing to be bound by the letter of transmittal, you will represent to us that, among other things:

Withdrawal of Tenders

Except as otherwise provided in this prospectus, you may withdraw your tender at any time prior to 5:00 p.m. New York City time on the expiration date. For a withdrawal to be effective you must comply with the appropriate procedures of DTC’s ATOP system. Any notice of withdrawal must specify the name and number of the account at DTC to be credited with withdrawn old notes and otherwise comply with the procedures of DTC.

We will determine all questions as to the validity, form, eligibility and time of receipt of notice of withdrawal. Our determination shall be final and binding on all parties. We will deem any old notes so withdrawn not to have been validly tendered for exchange for purposes of the exchange offer.

Any old notes that have been tendered for exchange but are not exchanged for any reason will be credited to an account maintained with DTC for the old notes. This crediting will take place as soon as practicable after withdrawal, rejection of tender or termination of the exchange offer. You may retender properly withdrawn old notes by following the procedures described under “—Procedures for Tendering” above at any time prior to 5:00 p.m., New York City time, on the expiration date.

Fees and Expenses

We will bear the expenses of soliciting tenders. The principal solicitation is being made by mail; however, we may make additional solicitation by facsimile, telephone, electronic mail or in person by our officers and employees and those of our affiliates.

We have not retained any dealer-manager in connection with the exchange offer and will not make any payments to broker-dealers or others soliciting acceptances of the exchange offer. We will, however, pay the exchange agent reasonable and customary fees for its services and reimburse it for its related reasonable out-of-pocket expenses.

We will pay the cash expenses to be incurred in connection with the exchange offer. They include:

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Transfer Taxes

We will pay all transfer taxes, if any, applicable to the exchange of old notes under the exchange offer. The tendering holder, however, will be required to pay any transfer taxes, whether imposed on the registered holder or any other person, if a transfer tax is imposed for any reason other than the exchange of old notes under the exchange offer.

Consequences of Failure to Exchange

If you do not exchange new notes for your old notes under the exchange offer, you will remain subject to the existing restrictions on transfer of the old notes. In general, you may not offer or sell the old notes unless the offer or sale is either registered under the Securities Act or exempt from the registration under the Securities Act and applicable state securities laws. Except as required by the registration rights agreement, we do not intend to register resales of the old notes under the Securities Act.

Accounting Treatment

We will record the new notes in our accounting records at the same carrying value as the old notes. This carrying value is the aggregate principal amount of the old notes, as reflected in our accounting records on the date of exchange. Accordingly, we will not recognize any gain or loss for accounting purposes in connection with the exchange offer.

Other

Participation in the exchange offer is voluntary, and you should carefully consider whether to accept. You are urged to consult your financial and tax advisors in making your own decision on what action to take.

We may in the future seek to acquire untendered old notes in open market or privately negotiated transactions, through subsequent exchange offers or otherwise. We have no present plans to acquire any old notes that are not tendered in the exchange offer or to file a registration statement to permit resales of any untendered old notes.

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USE OF PROCEEDS

The exchange offer is intended to satisfy our obligations under the registration rights agreement. We will not receive any proceeds from the issuance of the new notes in the exchange offer. In consideration for issuing the new notes as contemplated by this prospectus, we will receive old notes in a like principal amount. The form and terms of the new notes are identical in all respects to the form and terms of the old notes, except the new notes will be registered under the Securities Act and will not contain restrictions on transfer, registration rights or provisions for additional interest. Old notes surrendered in exchange for the new notes will be retired and cancelled and will not be reissued. Accordingly, the issuance of the new notes will not result in any change in outstanding indebtedness.

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DESCRIPTION OF THE NOTES

You can find the definitions of certain terms used in this description under the subheading “—Certain Definitions.” In this description, the term “W&T,” “us,” “our” or “we” refers only to W&T Offshore, Inc. and not to any of its subsidiaries. References to the “notes” in this section of the prospectus include both the old notes issued on June 10, 2011 and the new notes, unless the context otherwise requires.

The new notes will be issued and the old notes were issued under an indenture dated as of June 10, 2011, among W&T, the Guarantors and Wells Fargo Bank, N.A., as trustee. The terms of the notes include those stated in the indenture and those made part of the indenture by reference to the Trust Indenture Act.

The following description is a summary of the material provisions of the indenture. It does not restate the agreement in its entirety. We urge you to read the indenture because it defines the rights of holders of the notes. A copy of the indenture is filed as an exhibit to the registration statement of which this prospectus is a part.

You can find the definition of various terms used in this “Description of the Notes” under “—Certain Definitions” below. Certain defined terms used in this description but not defined below under “—Certain Definitions” have the meanings assigned to them in the indenture.

The registered holder of a note will be treated as the owner of it for all purposes. Only registered holders have rights under the indenture.

If the exchange offer contemplated by this prospectus is consummated, holders of old notes who do not exchange those notes for new notes in the exchange offer will vote together with holders of new notes for all relevant purposes under the indenture. In that regard, the indenture requires that certain actions by the holders thereunder must be taken, and certain rights must be exercised, by specified minimum percentages of the aggregate principal amount of the outstanding securities issued under the indenture. In determining whether holders of the requisite percentage in principal amount have given any notice, consent or waiver or taken any other action permitted under the indenture, any old notes that remain outstanding after the exchange offer will be aggregated with the new notes, and the holders of such old notes and the new notes will vote together as a single class for all such purposes. Accordingly, all references herein to specified percentages in aggregate principal amount of the notes outstanding shall be deemed to mean, at any time after the exchange offer is consummated, such percentages in aggregate principal amount of the old notes and the new notes then outstanding.

Brief Description of the Notes and the Note Guarantees

The Notes

Like the old notes, the new notes will:

See “Risk Factors—Risks Relating to the Notes—The notes and the guarantees are unsecured and effectively subordinated to our and our subsidiary guarantors’ existing and future secured indebtedness.”

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The Note Guarantees

The new notes, like the old notes, will be guaranteed by each of W&T’s existing Subsidiaries, other than White Shoal Pipeline Corporation. Another immaterial subsidiary is in the process of liquidation and dissolution, and will not guarantee the notes. In the event of a bankruptcy, liquidation or reorganization of any non-guarantor Subsidiary, the non-guarantor Subsidiary will pay the holders of its debt and its trade creditors before it will be able to distribute any of its assets to W&T.

Any future Domestic Subsidiaries of W&T that has Indebtedness outstanding in excess of a Minimum Amount or guarantees other Indebtedness of W&T or of a Guarantor in excess of a Minimum Amount will be required to guarantee the notes as set forth below under the caption “—Certain Covenants—Additional Note Guarantees.”

Each guarantee of the new notes will:

Currently, all of our Subsidiaries are “Restricted Subsidiaries.” However, under the circumstances described below under the caption “—Certain Covenants—Designation of Restricted and Unrestricted Subsidiaries,” we may designate certain of our existing or future Subsidiaries as “Unrestricted Subsidiaries.” Our Unrestricted Subsidiaries will not be subject to many of the restrictive covenants in the indenture. Our Unrestricted Subsidiaries will not guarantee the notes.

Principal, Maturity and Interest

W&T has issued $600.0 million in aggregate principal amount of notes. In addition to the new notes issued in the exchange offer, W&T may issue additional notes under the indenture from time to time after this exchange offer. Any issuance of additional notes is subject to all of the covenants in the indenture, including the covenant described below under the caption “—Certain Covenants—Incurrence of Indebtedness and Issuance of Preferred Stock.” The old notes, the new notes and any additional notes subsequently issued under the indenture will be treated as a single class for all purposes under the indenture, including, without limitation, waivers, amendments, redemptions and offers to purchase. Notes will be issued in minimum denominations of $1,000 and integral multiples of $1,000. The notes will mature on June 15, 2019.

Interest on the notes accrues at the rate of 8.500% per annum and is payable semi-annually in arrears on June 15 and December 15, commencing on December 15, 2011. Interest on overdue principal and interest will accrue a rate that is 1% higher than the then applicable interest rate on the notes. W&T will make each interest payment to the holders of record on the immediately preceding June 1 and December 1.

Interest on the new notes will accrue from the date of original issuance of the old notes or, if interest has already been paid on the old notes, from the date it was most recently paid. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months.

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Methods of Receiving Payments on the Notes

If a holder of notes has given wire transfer instructions to W&T, W&T will pay all principal, interest and premium on that holder’s notes in accordance with those instructions. All other payments on the notes will be made at the office or agency of the paying agent and registrar within the City and State of New York unless W&T elects to make interest payments by check mailed to the holders at their addresses set forth in the register of holders.

Paying Agent and Registrar for the Notes

The trustee is acting as paying agent and registrar. W&T may change the paying agent or registrar without prior notice to the holders of the notes, and W&T or any of its Subsidiaries may act as paying agent or registrar.

Transfer and Exchange

A holder may transfer or exchange notes in accordance with the provisions of the indenture. The registrar and the trustee may require a holder, among other things, to furnish appropriate endorsements and transfer documents in connection with a transfer of notes. Holders will be required to pay all taxes due on transfer. W&T will not be required to transfer or exchange any note selected for redemption. Also, W&T will not be required to transfer or exchange any note for a period of 15 days before a selection of notes to be redeemed.

Note Guarantees

Like the old notes, the new notes will be jointly and severally guaranteed on a senior basis by the Guarantors. Any Domestic Subsidiaries of W&T that has Indebtedness outstanding in excess of a Minimum Amount or guarantees other Indebtedness of W&T or of a Guarantor in excess of a Minimum Amount will be required to guarantee the notes as set forth below under the caption described under “—Certain Covenants—Additional Note Guarantees.” The obligations of each Guarantor under its Note Guarantee will be limited as necessary to prevent that Note Guarantee from constituting a fraudulent conveyance under applicable law. See “Risk Factors—Risks Relating to the Notes—If the subsidiary guarantees are deemed fraudulent conveyances or preferential transfers, a court may subordinate or void them.”

A Guarantor may not sell or otherwise dispose of all or substantially all of its assets to, or consolidate with or merge with or into (whether or not such Guarantor is the surviving Person) another Person, other than W&T or another Guarantor, unless:

(1) immediately after giving effect to that transaction, no Default or Event of Default exists; and

(2) either:

(a) the Person acquiring the assets in any such sale or disposition or the Person formed by or surviving any such consolidation or merger (if other than W&T or another Guarantor) unconditionally assumes, pursuant to a supplemental indenture substantially in the form attached as an exhibit to the indenture, all the obligations of such Guarantor under the indenture and its Note Guarantee; or

(b) such transaction complies with the provisions of the indenture described under the caption “—Repurchase at the Option of Holders—Asset Sales.”

The Note Guarantee of a Guarantor will be released:

(1) in connection with any sale or other disposition of all or substantially all of the assets of that Guarantor (including by way of merger or consolidation) to a Person that is not (either before or after giving effect to such transaction) W&T or a Restricted Subsidiary of W&T, if the sale or other disposition does not violate the “Asset Sales” provisions of the indenture;

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(2) in connection with any sale or other disposition of the Capital Stock of such Guarantor to a Person that is not (either before or after giving effect to such transaction) W&T or a Restricted Subsidiary of W&T, if the sale or other disposition does not violate the “Asset Sales” provisions of the indenture and the Guarantor ceases to be a Subsidiary of W&T as a result of such sales or disposition;

(3) if such Guarantor is a Restricted Subsidiary and W&T designates such Guarantor as an Unrestricted Subsidiary in accordance with the applicable provisions of the indenture;

(4) upon Legal Defeasance or Covenant Defeasance as described below under the caption “—Legal Defeasance and Covenant Defeasance” or upon satisfaction and discharge of the indenture as described below under the caption “—Satisfaction and Discharge”;

(5) upon the liquidation or dissolution of such Guarantor, provided no Default or Event of Default has occurred and is continuing; or

(6) at such time as such Guarantor is no longer required to be a Guarantor of the notes as described below under the caption “Certain Covenants—Additional Note Guarantees,” provided no Default or Event of Default has occurred and is continuing.

Optional Redemption

Except as otherwise described in this section and in the final paragraph under “—Repurchase at the Option of Holders—Change of Control,” the notes will not be redeemable at W&T’s option prior to June 15, 2015. W&T is not, however, prohibited from acquiring the notes by means other than a redemption, whether pursuant to a tender offer, open market purchase or otherwise, so long as the acquisition does not violate the terms of the indenture.

On or after June 15, 2015, the notes will be subject to redemption at the option of W&T, in whole or in part, at the redemption prices (expressed as percentages of principal amount) set forth below plus accrued and unpaid interest thereon to, but not including, the applicable redemption date (subject to the right of holders on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date), if redeemed during the twelve-month period beginning on June 15 of the year indicated below:

Prior to June 15, 2014, W&T may on any one or more occasions redeem up to 35% of the aggregate principal amount of notes at a redemption price of 108.500% of the principal amount thereof, plus accrued and unpaid interest to, but not including, the redemption date (subject to the right of holders on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date) with the net cash proceeds of one or more Equity Offerings; provided that

(1) at least 65% in aggregate principal amount of notes originally issued under the indenture remains outstanding immediately after the occurrence of such redemption; and

(2) each such redemption must occur within 90 days of the date of the closing of the related Equity Offering.

In addition, at any time prior to June 15, 2015, the notes may be redeemed in whole or in part at the option of W&T at a redemption price equal to 100% of the principal amount thereof plus the Applicable Premium as of, and accrued and unpaid interest, if any, to, but not including, the date of redemption (subject to the right of holders on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date).

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All redemptions of the notes will be made upon not less than 30 days’ nor more than 60 days’ prior notice, except that a redemption notice may be made more than 60 days prior to a redemption date if the notice is issued in connection with a defeasance of the notes or a satisfaction and discharge of the indenture. Notices of redemption may not be conditional, except that any redemption effected with the net proceeds of one more Equity Offerings as described above may, at W&T’s discretion, be conditioned upon completion of the related Equity Offering. Unless W&T defaults in the payment of the redemption price, interest will cease to accrue on the notes or portions thereof called for redemption on the applicable redemption date.

Mandatory Redemption

W&T is not required to make mandatory redemption or sinking fund payments with respect to the notes.

Selection and Notice

If less than all of the notes are to be redeemed at any time, the trustee will select notes for redemption on a pro rata basis (except that any notes represented by a global note will be redeemed by such method as DTC may require), unless otherwise required by law or applicable stock exchange requirements.

No notes of $1,000 or less can be redeemed in part. Notices of redemption will be mailed by first class mail at least 30 but not more than 60 days before the redemption date to each holder of notes to be redeemed at its registered address, except that redemption notices may be mailed more than 60 days prior to a redemption date if the notice is issued in connection with a defeasance of the notes or a satisfaction and discharge of the indenture.

If any note is to be redeemed in part only, the notice of redemption that relates to that note will state the portion of the principal amount of that note that is to be redeemed. A new note in principal amount equal to the unredeemed portion of the original note will be issued in the name of the holder of notes upon cancellation of the original note. Notes called for redemption become due on the date fixed for redemption. On and after the redemption date, interest ceases to accrue on notes or portions of notes called for redemption, unless W&T defaults in making the payment of funds for such a redemption.

Repurchase at the Option of Holders

Change of Control

If a Change of Control occurs, each holder of notes will have the right to require W&T to repurchase all or any part (equal to $1,000 or an integral multiple of $1,000) of that holder’s notes pursuant to an offer (a “Change of Control Offer”) on the terms set forth in the indenture. In the Change of Control Offer, W&T will offer a payment in cash (the “Change of Control Payment”) equal to 101% of the aggregate principal amount of notes repurchased plus accrued and unpaid interest on the notes repurchased (subject to the right of holders of notes on the relevant record date to receive interest due on an interest payment date that is on or prior to the Change of Control Payment Date) to, but excluding, the date of purchase (the “Change of Control Payment Date”). Within 30 days following any Change of Control, W&T will mail a notice to each holder describing the transaction or transactions that constitute the Change of Control and offering to repurchase notes properly tendered prior to the expiration date of the Change of Control Offer specified in the notice, which date will be no earlier than 30 days and no later than 60 days from the date such notice is mailed, pursuant to the procedures required by the indenture and described in such notice. W&T will comply with the requirements of Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with the repurchase of the notes as a result of a Change of Control. To the extent that the provisions of any securities laws or regulations conflict with the Change of Control provisions of the indenture, W&T will comply with the applicable securities laws and regulations and will not be deemed to have breached its obligations under the Change of Control provisions of the indenture by virtue of such compliance.

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Promptly following the expiration of the Change of Control Offer, W&T will, to the extent lawful, accept for payment all notes or portions thereof properly tendered pursuant to the Change of Control Offer, and W&T will:

(1) on the Change of Control Payment Date, deposit with the paying agent an amount equal to the Change of Control Payment in respect of all notes or portions of notes properly tendered; and

(2) on the Change of Control Payment Date, deliver or cause to be delivered to the trustee the notes properly accepted together with an officers’ certificate stating the aggregate principal amount of notes or portions of notes being purchased by W&T.

On the Change of Control Payment Date, the paying agent will mail to each holder of notes properly tendered the Change of Control Payment for such notes and the trustee will promptly authenticate and mail (or cause to be transferred by book entry) to each holder a new note equal in principal amount to any unpurchased portion of the notes surrendered, if any; provided that each such new note will be in a principal amount of $1,000 or an integral multiple thereof. Any note so accepted for payment will cease to accrue interest on and after the Change of Control Payment Date unless W&T defaults in making the Change of Control Payment. W&T will publicly announce the results of the Change of Control Offer on or as soon as practicable after the Change of Control Payment Date.

The provisions described above that require W&T to make a Change of Control Offer following a Change of Control will be applicable whether or not any other provisions of the indenture are applicable. Except as described above with respect to a Change of Control, the indenture does not contain provisions that permit the holders of the notes to require that W&T repurchase or redeem the notes in the event of a takeover, recapitalization or similar transaction.

W&T will not be required to make a Change of Control Offer upon a Change of Control if (1) a third party makes the Change of Control Offer in the manner, at the time and otherwise in compliance with the requirements set forth in the indenture applicable to a Change of Control Offer made by W&T and purchases all notes properly tendered and not withdrawn under the Change of Control Offer, or (2) notice of redemption has been given pursuant to the indenture as described above under the caption “—Optional Redemption,” unless and until there is a default in payment of the applicable redemption price.

A Change of Control Offer may be made in advance of a Change of Control, and conditioned upon the occurrence of such Change of Control, if a definitive agreement is in place for the Change of Control at the time of making the Change of Control Offer. Notes repurchased by W&T pursuant to a Change of Control Offer will have the status of notes issued but not outstanding or will be retired and cancelled, at W&T’s option. Notes purchased by a third party pursuant to the preceding paragraph will have the status of notes issued and outstanding.

The definition of Change of Control includes a phrase relating to the direct or indirect sale, lease, transfer, conveyance or other disposition of “all or substantially all” of the properties and assets of W&T and its Subsidiaries taken as a whole. Although there is a limited body of case law interpreting the phrase “substantially all,” there is no precise established definition of the phrase under applicable law. Accordingly, the ability of a holder of notes to require W&T to repurchase its notes as a result of a sale, lease, transfer, conveyance or other disposition of less than all of the properties and assets of W&T and its Subsidiaries taken as a whole to another Person or group may be uncertain.

In the event that holders of not less than 90% of the aggregate principal amount of the outstanding notes accept a Change of Control Offer and W&T (or the third party making the Change of Control Offer as described above) purchases all of the notes held by such holders, W&T will have the right, upon not less than 30 nor more than 60 days’ prior notice, given not more than 30 days following the purchase pursuant to the Change of Control Offer described above, to redeem all of the notes that remain outstanding following such purchase at a redemption price equal to the Change of Control Payment plus, to the extent not included in the Change of

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Control Payment, accrued and unpaid interest on the notes that remain outstanding, to, but not including, the date of redemption (subject to the right of holders on the relevant record date to receive interest due on an interest payment date that is on or prior to the redemption date).

Asset Sales

W&T will not, and will not permit any of its Restricted Subsidiaries to, consummate an Asset Sale unless:

(1) W&T (or the Restricted Subsidiary, as the case may be) receives consideration at the time of the Asset Sale at least equal to the Fair Market Value of the Equity Interests or other assets issued or sold or otherwise disposed of; and

(2)(a) at least 75% of the consideration received in the Asset Sale by W&T or such Restricted Subsidiary is in the form of cash or (b) the Fair Market Value of all forms of consideration other than cash received for all Asset Sales since the Issue Date does not exceed in the aggregate 10% of the Adjusted Consolidated Net Tangible Assets of W&T at the time each determination is made. For purposes of this provision, each of the following will be deemed to be cash:

(i) any liabilities, as shown on W&T’s most recent consolidated balance sheet, of W&T or any Restricted Subsidiary (other than contingent liabilities and Subordinated Obligations) that are assumed by the transferee of any such assets pursuant to a customary novation agreement that releases W&T or such Restricted Subsidiary from further liability;

(ii) any securities, notes or other obligations received by W&T or any such Restricted Subsidiary from such transferee that are converted by W&T or such Restricted Subsidiary into cash within 180 days after the date of the Asset Sale, to the extent of the cash received in that conversion;

(iii) any stock or assets of the kind referred to in clauses (2) or (3) of the next paragraph of this covenant; and

(iv) accounts receivable of a business retained by W&T or any Restricted Subsidiary, as the case may be, following the sale of such business; provided that such accounts receivable are not (a) past due more than 90 days and (b) do not have a payment date greater than 120 days from the date of the invoice creating such accounts receivable.

Within 360 days after the receipt of any Net Proceeds from an Asset Sale, or, if W&T has entered into a binding commitment or commitments with respect to the actions described in clauses (2) or (3) below, within 540 days after the receipt of any Net Proceeds from an Asset Sale. W&T (or the applicable Restricted Subsidiary, as the case may be) may apply such Net Proceeds:

(1) to repay, prepay, redeem or repurchase Senior Debt;

(2) to invest in Additional Assets;

(3) to make capital expenditures in respect of W&T’s or its Restricted Subsidiaries’ Oil and Gas Business; or

(4) any combination of the foregoing.

Pending the application of any Net Proceeds in the manner provided above, W&T or any Restricted Subsidiary may invest the Net Proceeds in any manner that is not prohibited by the indenture.

Any Net Proceeds from Asset Sales that are not applied or invested as provided in the second paragraph of this covenant will constitute “Excess Proceeds.” Within five days after the date that the aggregate amount of Excess Proceeds exceeds $20.0 million, W&T will make an offer (an “Asset Sale Offer”) to all holders of notes and all holders of other Indebtedness that is pari passu with the notes containing provisions similar to those set forth in the indenture with respect to offers to purchase or redeem with the proceeds of sales of assets, to purchase on a pro rata basis the maximum principal amount of notes and such other pari passu Indebtedness that

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may be purchased out of the Excess Proceeds. The offer price in any Asset Sale Offer will be equal to 100% of the principal amount plus accrued and unpaid interest to, but excluding, the date of purchase, and will be payable in cash. If any Excess Proceeds remain after consummation of an Asset Sale Offer, W&T may use those Excess Proceeds for any purpose not otherwise prohibited by the indenture. If the aggregate principal amount of notes tendered into such Asset Sale Offer exceeds the amount of Excess Proceeds allocated for the purchase of notes pursuant to the Asset Sale Offer, the trustee will select the notes to be purchased on a pro rata basis (or, in the case of notes represented by a global note, the trustee will select notes for purchase by such method as DTC may require). Upon completion of each Asset Sale Offer, the amount of Excess Proceeds will be reset at zero.

W&T will comply with the requirements of Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with each repurchase of notes pursuant to an Asset Sale Offer. To the extent that the provisions of any securities laws or regulations conflict with the Asset Sale provisions of the indenture, W&T will comply with the applicable securities laws and regulations and will not be deemed to have breached its obligations under the Asset Sale provisions of the indenture by virtue of such compliance.

The Credit Agreement and certain other agreements governing W&T’s other Indebtedness contain, and future agreements may contain, prohibitions of certain events, including events that would constitute a Change of Control or an Asset Sale and including repurchases of or other prepayments in respect of the notes. The exercise by the holders of notes of their right to require W&T to repurchase the notes upon a Change of Control or an Asset Sale could cause a default under these other agreements, even if the Change of Control or Asset Sale itself is not due to the financial effect of such repurchases on W&T or otherwise. In the event a Change of Control or Asset Sale occurs at a time when W&T is prohibited from purchasing notes, W&T could seek the consent of the applicable lenders to the purchase of notes or could attempt to refinance the Indebtedness that contain such prohibitions. If W&T does not obtain a consent or repay that Indebtedness, W&T will remain prohibited from purchasing notes. In that case, W&T’s failure to purchase tendered notes would constitute an Event of Default under the indenture which could, in turn, constitute a default under other Indebtedness. Finally, W&T’s ability to pay cash to the holders of notes upon a repurchase may be limited by W&T’s then existing financial resources. See “Risk factors—Risks Relating to the Notes—We may not be able to repurchase the notes upon a change of control.”

Certain Covenants

Restricted Payments

W&T will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly:

(1) declare or pay any dividend or make any other payment or distribution on account of W&T’s or any of its Restricted Subsidiaries’ Equity Interests (including, without limitation, any dividend, payment or distribution made by W&T or any of its Restricted Subsidiaries in connection with any merger or consolidation involving W&T or any of its Restricted Subsidiaries) or to the direct or indirect holders of W&T’s or any of its Restricted Subsidiaries’ Equity Interests in their capacity as such (other than dividends or distributions payable in Equity Interests (other than Disqualified Stock) of W&T and other than dividends or distributions payable to W&T or a Restricted Subsidiary of W&T);

(2) purchase, redeem or otherwise acquire or retire for value (including, without limitation, any such purchase, redemption, acquisition or retirement made in connection with any merger or consolidation involving W&T) any Equity Interests of W&T or any direct or indirect parent of W&T;

(3) make any payment on or with respect to, or purchase, redeem, defease or otherwise acquire or retire for value, prior to the Stated Maturity thereof, any Subordinated Obligation (excluding the purchase or other acquisition of any Subordinated Obligation in anticipation of satisfying a sinking fund obligation, principal installment or final maturity payment, in each case due within one year of the date of purchase or other acquisition); or

(4) make any Restricted Investment

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(all such payments and other actions set forth in clauses (1) through (4) above being collectively referred to as “Restricted Payments”),

unless, at the time of and after giving effect to such Restricted Payment:

(1) no Default or Event of Default has occurred and is continuing or would occur as a consequence of such Restricted Payment;

(2) W&T would, at the time of such Restricted Payment and after giving pro forma effect thereto as if such Restricted Payment had been made at the beginning of the applicable four-quarter period, have been permitted to incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test set forth in the first paragraph of the covenant described below under the caption “—Incurrence of Indebtedness and Issuance of Preferred Stock;” and

(3) such Restricted Payment, together with the aggregate amount of all other Restricted Payments made by W&T and its Restricted Subsidiaries since the Prior Issue Date (excluding Restricted Payments permitted by clauses (2), (3), (4), (5), (6), (7), (9) or (10) of the next succeeding paragraph), is equal to or less than the sum, without duplication, of the following (such sum being referred to as the “Restricted Payments Basket”):

(a) 50% of the Consolidated Net Income of W&T for the period (taken as one accounting period) from April 1, 2007 to the end of W&T’s most recently ended fiscal quarter for which internal financial statements are available at the time of such Restricted Payment (or, if such Consolidated Net Income for such period is a deficit, less 100% of such deficit); plus

(b) 100% of the aggregate net cash proceeds and 100% of the Fair Market Value of securities or other property other than cash received that is used or useful in the Oil and Gas Business by W&T since the Prior Issue Date from the sale of Equity Interests of W&T (other than Disqualified Stock) or as a contribution to W&T’s common equity capital or from the sale of convertible or exchangeable Disqualified Stock or convertible or exchangeable debt securities of W&T that have been converted or exchanged for such Equity Interests (other than Equity Interests (or Disqualified Stock or debt securities) sold to a Subsidiary of W&T or to an employee stock ownership plan, option plan or similar trust to the extent such sale to an employee stock ownership plan, option plan or similar trust is financed by loans from or guaranteed by W&T or any of its Restricted Subsidiaries unless such loans have been repaid with cash on or prior to the date of determination); plus

(c) the amount equal to the net reduction in Restricted Investments made by W&T or any of its Restricted Subsidiaries in any Person since the Prior Issue Date resulting from:

(i) repurchases or redemptions of such Restricted Investments by such Person, proceeds realized upon the sale of such Restricted Investment to a purchaser other than W&T or a Subsidiary or W&T, repayments of loans or advances or other transfers of assets (including by way of dividend or distribution) by such Person to W&T or any Restricted Subsidiary of W&T; or

(ii) the redesignation of any Unrestricted Subsidiary as a Restricted Subsidiary (valued in each case at the Fair Market Value of W&T’s Investment in such Unrestricted Subsidiary at the time of redesignation) not to exceed the amount of Investments previously made by W&T or any Restricted Subsidiary of W&T in such Unrestricted Subsidiary,

which amount in each case under this clause (c) was included in the calculation of the amount of Restricted Payments; provided, however, that no amount will be included under this clause (c) to the extent it is already included in Consolidated Net Income; plus

(d) 50% of any dividends received by W&T or a Restricted Subsidiary of W&T that is a Guarantor after the Prior Issue Date from an Unrestricted Subsidiary of W&T, to the extent that such dividends were not otherwise included in the Consolidated Net Income of W&T for such period.

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The preceding provisions will not prohibit:

(1) the payment of any dividend within 90 days after the date of declaration of the dividend or the consummation of any irrevocable redemption within 60 days after the date of giving of the redemption notice, as the case may be, if at the date of declaration or notice, the dividend or redemption payment would have complied with the provisions of the indenture;

(2) the making of any Restricted Payment since the Issue Date in exchange for, or out of the net cash proceeds of the substantially concurrent sale (other than to a Subsidiary of W&T) of, Equity Interests of W&T (other than Disqualified Stock and other than Equity Interests issued or sold to an employee stock ownership plan, option plan or similar trust to the extent such sale to an employee stock ownership plan, option plan or similar trust is financed by loans from or guaranteed by W&T or any of its Restricted Subsidiaries unless such loans have been repaid with cash on or prior to the date of determination) or from the substantially concurrent contribution of common equity capital to W&T; provided that the amount of any such net cash proceeds that are utilized for any such Restricted Payment will be excluded from clause (3)(b) of the preceding paragraph;

(3) the repurchase, redemption, defeasance or other acquisition or retirement for value since the Issue Date of Subordinated Obligations in exchange for, or with the net cash proceeds from a substantially concurrent incurrence of, Permitted Refinancing Indebtedness;

(4) the payment since the Issue Date of any dividend (or, in the case of any partnership or limited liability company, any similar distribution) by a Restricted Subsidiary of W&T to the holders of its Equity Interests on a pro rata basis;

(5) so long as no Default has occurred and is continuing or would be caused thereby, the repurchase, redemption or other acquisition or retirement for value since the Prior Issue Date of any Equity Interests of W&T or any Restricted Subsidiary of W&T held by any of W&T’s (or any of its Restricted Subsidiaries’) current or former directors or employees pursuant to any director or employee equity subscription agreement, stock option agreement or restricted stock agreement; provided that the aggregate price paid for all such repurchased, redeemed, acquired or retired Equity Interests may not exceed $5.0 million in any twelve-month period (with unused amounts in any 12-month period being permitted to be carried over into succeeding 12-month periods); provided, further, that the amounts in any 12-month period may be increased by an amount not to exceed (A) the cash proceeds received by W&T or any of its Restricted Subsidiaries from the sale of W&T’s Equity Interests (other than Disqualified Stock) to any such directors or employees that occurs after the Prior Issue Date (provided that the amount of such cash proceeds utilized for any such repurchase, retirement or other acquisition or retirement will be excluded from clause (3)(b) of the preceding paragraph) plus (B) the cash proceeds of key man life insurance policies received by W&T and its Restricted Subsidiaries after the Prior Issue Date;

(6) so long as no Default has occurred and is continuing or would be caused thereby, the repurchase, redemption or other acquisition or retirement for value since the Issue Date of any Equity Interests of W&T or any Restricted Subsidiary of W&T held by any of W&T’s (or any of its Restricted Subsidiaries’) current or former directors or employees in connection with the exercise or vesting of any equity compensation (including, without limitation, stock options, restricted stock and phantom stock) or made in order to satisfy W&T’s or such Restricted Subsidiary’s tax withholding obligation with respect to such exercise or vesting;

(7) so long as no Default has occurred and is continuing or would be caused thereby, repurchases of Subordinated Obligations at a purchase price not greater than (i) 101% of the principal amount of such Subordinated Obligations in the event of a Change of Control or (ii) 100% of the principal amount of such Subordinated Obligations in the event of an Asset Sale, in each case plus accrued and unpaid interest, in connection with any change of control offer or asset sale offer required by the terms of such Subordinated Obligations, but only if:

(a) in the case of a Change of Control, W&T has first complied with and fully satisfied its obligations under the provisions described under “—Repurchase at the Option of Holders—Change of

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Control” (including without limitation the repurchase of all notes validly tendered for payment in connection therewith); or

(b) in the case of an Asset Sale, W&T has complied with and fully satisfied its obligations in accordance with the covenant under the heading, “—Repurchase at the Option of Holders—Asset Sales” (including without limitation the repurchase of all notes validly tendered for payment in connection therewith);

(8) the repurchase, redemption or other acquisition or retirement for value of Capital Stock of W&T representing fractional shares of such Capital Stock in connection with a merger, consolidation or other combination involving W&T or any other transaction permitted by the indenture;

(9) Restricted Payments of the type referred to in clauses (1) or (2) of the first paragraph of this covenant in an amount up to $30.0 million for each twelve-month period following the Prior Issue Date, with any unused portion of such amount in any such period to be carried forward to succeeding twelve-month periods;

(10) other Restricted Payments in an aggregate amount not to exceed $200.0 million since the Prior Issue Date; and

(11) the declaration and payment of regularly scheduled or accrued dividends to holders of any class or series of Disqualified Stock of W&T or any Restricted Subsidiary of W&T issued on or after the Prior Issue Date in accordance with the Fixed Charge Coverage Ratio test described below under the caption “—Incurrence of Indebtedness and Issuance of Preferred Stock.”

The amount of all Restricted Payments (other than cash) will be the Fair Market Value on the date of the Restricted Payment of the asset(s) or securities proposed to be transferred or issued by W&T or such Restricted Subsidiary, as the case may be, pursuant to the Restricted Payment. The Fair Market Value of any assets or securities that are required to be valued by this covenant will be evidenced by an officers’ certificate delivered to the trustee within five Business Days of the making of the Restricted Payment, together with a copy of any related resolution of the Board of Directors of W&T. Such officers’ certificate shall state that the Restricted Payment is permitted by this covenant. For purposes of determining compliance with this covenant, in the event that a Restricted Payment meets the criteria of more than one of the exceptions described in (1) through (11) above or is entitled to be made pursuant to the first paragraph of this covenant, W&T shall, in its sole discretion, classify such Restricted Payment, or later classify, reclassify or re-divide all or a portion of such Restricted Payment, in any manner that complies with this covenant.

Incurrence of Indebtedness and Issuance of Preferred Stock

W&T will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly, create, incur, issue, assume, guarantee or otherwise become directly or indirectly liable, contingently or otherwise, with respect to (collectively, “incur”) any Indebtedness (including Acquired Debt), and W&T will not issue any Disqualified Stock and will not permit any of its Restricted Subsidiaries to issue any shares of preferred stock; provided, however, that W&T and the Restricted Subsidiaries may incur Indebtedness (including Acquired Debt) or issue Disqualified Stock or preferred stock of a Restricted Subsidiary, if the Fixed Charge Coverage Ratio for W&T’s most recently ended four full fiscal quarters for which internal financial statements are available immediately preceding the date on which such additional Indebtedness is incurred or such Disqualified Stock or preferred stock of a Restricted Subsidiary is issued, as the case may be, would have been at least 2.0 to 1.0, determined on a pro forma basis (including a pro forma application of the net proceeds therefrom), as if the additional Indebtedness had been incurred or the Disqualified Stock or preferred stock of a Restricted Subsidiary had been issued, as the case may be, at the beginning of such four-quarter period.

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The first paragraph of this covenant will not prohibit the incurrence of any of the following items of Indebtedness (collectively, “Permitted Debt”):

(1) the incurrence by W&T and any Restricted Subsidiary of Indebtedness (including letters of credit) under Credit Facilities in an aggregate principal amount at any one time outstanding under this clause (1) (with letters of credit being deemed to have a principal amount equal to the maximum potential liability of W&T and its Restricted Subsidiaries thereunder) not to exceed the greater of (a) $800.0 million and (b) an amount equal to the sum of (A) $600.0 million plus (B) 10% of Adjusted Consolidated Net Tangible Assets determined as of the date of the incurrence of such Indebtedness after giving pro forma effect to such incurrence and the application of the proceeds therefrom;

(2) the incurrence by W&T and its Restricted Subsidiaries of the Existing Indebtedness;

(3) the incurrence by W&T and the Guarantors of Indebtedness represented by the notes and the related Note Guarantees issued on the date of the indenture and any exchange notes and related guarantees issued in exchange therefor pursuant to a registration rights agreement;

(4) the incurrence by W&T or any of its Restricted Subsidiaries of Indebtedness represented by Capital Lease Obligations, mortgage financings or purchase money obligations, in each case, incurred for the purpose of financing all or any part of the purchase price or cost of design, construction, installation or improvement of property, plant or equipment used in the business of W&T or any of its Restricted Subsidiaries, in an aggregate principal amount, including all Permitted Refinancing Indebtedness incurred to renew, refund, refinance, replace, defease or discharge any Indebtedness incurred pursuant to this clause (4), not to exceed $50.0 million at any time outstanding;

(5) the incurrence by W&T or any of its Restricted Subsidiaries of Permitted Refinancing Indebtedness in exchange for, or the net proceeds of which are used to renew, refund, refinance, replace, defease or discharge any Indebtedness (other than intercompany Indebtedness) that was permitted by the indenture to be incurred under the first paragraph of this covenant or clauses (2), (3), (4) or (11) of this paragraph or this clause (5);

(6) the incurrence by W&T or any of its Restricted Subsidiaries of intercompany Indebtedness between or among W&T and any of its Restricted Subsidiaries; provided, however, that:

(a) if W&T or any Guarantor is the obligor on such Indebtedness and the payee is not W&T or a Guarantor, such Indebtedness must be expressly subordinated to the prior payment in full in cash of all Obligations then due with respect to the notes, in the case of W&T, or the Note Guarantee, in the case of a Guarantor; and

(b)(i) any subsequent issuance or transfer of Equity Interests that results in any such Indebtedness being held by a Person other than W&T or a Restricted Subsidiary of W&T and (ii) any sale or other transfer of any such Indebtedness to a Person that is not either W&T or a Restricted Subsidiary of W&T will be deemed, in each case, to constitute an incurrence of such Indebtedness by W&T or such Restricted Subsidiary, as the case may be, that was not permitted by this clause (6);

(7) the issuance by any of W&T’s Restricted Subsidiaries to W&T or to any of its Restricted Subsidiaries of shares of preferred stock; provided, however, that:

(a) any subsequent issuance or transfer of Equity Interests that results in any such preferred stock being held by a Person other than W&T or a Restricted Subsidiary of W&T; and

(b) any sale or other transfer of any such preferred stock to a Person that is not either W&T or a Restricted Subsidiary of W&T,

will be deemed, in each case, to constitute an issuance of such preferred stock by such Restricted Subsidiary that was not permitted by this clause (7);

(8) the incurrence by W&T or any of its Restricted Subsidiaries of Hedging Obligations in the ordinary course of business;

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(9) the incurrence by W&T of any of its Restricted Subsidiaries of obligations relating to net gas balancing positions arising in the ordinary course of business and consistent with past practice;

(10) the Guarantee by W&T or any of the Guarantors of Indebtedness of W&T or a Restricted Subsidiary of W&T that was permitted to be incurred by another provision of this covenant; provided that if the Indebtedness being guaranteed is subordinated to or pari passu with the notes, then the Guarantee shall be subordinated or pari passu, as applicable, to the same extent as the Indebtedness guaranteed;

(11) Permitted Acquisition Indebtedness;

(12) the incurrence by W&T or any of its Restricted Subsidiaries of Indebtedness arising from the honoring by a bank or other financial institution of a check, draft or similar instrument inadvertently drawn against insufficient funds, so long as such Indebtedness is covered within five Business Days;

(13) Indebtedness consisting of the financing of insurance premiums in customary amounts consistent with the operations and business of W&T and its Restricted Subsidiaries;

(14) the incurrence by W&T or any of its Restricted Subsidiaries of Indebtedness arising from agreements of W&T or any of its Restricted Subsidiaries providing for indemnification, adjustment of purchase price or similar obligations, in each case, incurred or assumed in connection with the disposition of any business, assets or Capital Stock of a Subsidiary, provided that the maximum aggregate liability in respect of all such Indebtedness shall at no time exceed the gross proceeds actually received by W&T and its Restricted Subsidiaries in connection with such disposition;

(15) the incurrence by W&T or any of its Restricted Subsidiaries of Indebtedness in respect of bid, performance, surety and similar bonds issued for the account of W&T and any of its Restricted Subsidiaries in the ordinary course of business, including guarantees and obligations of W&T or any of its Restricted Subsidiaries with respect to letters of credit supporting such obligations (in each case, other than an obligation for money borrowed); and

(16) the incurrence by W&T or any of its Restricted Subsidiaries of additional Indebtedness in an aggregate principal amount (or accreted value, as applicable) at any time outstanding not to exceed $100.0 million

W&T will not incur, and will not permit any Guarantor to incur, any Indebtedness (including Permitted Debt) that is contractually subordinated in right of payment to any other Indebtedness of W&T or such Guarantor unless such Indebtedness is also contractually subordinated in right of payment to the notes and the applicable Note Guarantee on substantially identical terms; provided, however, that no Indebtedness will be deemed to be contractually subordinated in right of payment to any other Indebtedness solely by virtue of being unsecured or by virtue of being secured on a first or junior Lien basis.

For purposes of determining compliance with this “Incurrence of Indebtedness and Issuance of Preferred Stock” covenant, in the event that an item of proposed Indebtedness meets the criteria of more than one of the categories of Permitted Debt described in clauses (1) through (16) above, or is entitled to be incurred pursuant to the first paragraph of this covenant, W&T will be permitted to classify such item of Indebtedness on the date of its incurrence, or later reclassify all or a portion of such item of Indebtedness, in any manner that complies with this covenant. The accrual of interest, the accretion or amortization of original issue discount, the payment of interest on any Indebtedness in the form of additional Indebtedness with the same terms, and the payment of dividends on Disqualified Stock in the form of additional shares of the same class of Disqualified Stock will not be deemed to be an incurrence of Indebtedness or an issuance of Disqualified Stock for purposes of this covenant; provided, in each such case, that the amount of any such accrual, accretion or payment is included in Fixed Charges of W&T as accrued. Notwithstanding any other provision of this covenant, the maximum amount of Indebtedness that W&T or any Restricted Subsidiary may incur pursuant to this covenant shall not be deemed to be exceeded solely as a result of fluctuations in exchange rates or currency values.

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The amount of any Indebtedness outstanding as of any date will be:

(1) the accreted value of the Indebtedness, in the case of any Indebtedness issued with original issue discount;

(2) the principal amount of the Indebtedness, in the case of any other Indebtedness; and

(3) in respect of Indebtedness of another Person secured by a Lien on the assets of the specified Person, the lesser of:

(a) the Fair Market Value of such asset at such date of determination; and

(b) the amount of the Indebtedness of the other Person.

Liens

W&T will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly, create, incur, assume or suffer to exist any Lien (other than Permitted Liens) upon any of its property or assets (whether now owned or hereafter acquired), securing any Subordinated Obligations or other Indebtedness, unless:

(1) in the case of any Lien securing Subordinated Obligations of W&T or a Guarantor, the notes or Note Guarantee, as applicable, are secured by a Lien on such property or assets on a senior basis to the Subordinated Obligations so secured until such time as such Subordinated Obligations are no longer so secured by that Lien; and

(2) in the case of any other Lien (other than a Permitted Lien) securing other Indebtedness, the notes or Note Guarantees, as applicable, are secured by a Lien on such property or assets on an equal and ratable basis with the Indebtedness so secured until such time as such Indebtedness is no longer so secured by that Lien.

Dividend and Other Payment Restrictions Affecting Subsidiaries

W&T will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly, create or permit to exist or become effective any consensual encumbrance or restriction on the ability of any Restricted Subsidiary to:

(1) pay dividends or make any other distributions on its Capital Stock to W&T or any of its Restricted Subsidiaries, or pay any indebtedness owed to W&T or any of its Restricted Subsidiaries;

(2) make loans or advances to W&T or any of its Restricted Subsidiaries; or

(3) sell, lease or transfer any of its properties or assets to W&T or any of its Restricted Subsidiaries.

However, the preceding restrictions will not apply to encumbrances or restrictions existing under or by reason of:

(1) agreements governing Existing Indebtedness and Credit Facilities as in effect on the Issue Date and any amendments, restatements, modifications, renewals, supplements, increases, refundings, replacements or refinancings of those agreements; provided that the amendments, restatements, modifications, renewals, supplements, increases, refundings, replacements or refinancings are not materially more restrictive, taken as a whole, with respect to such dividend and other payment encumbrances or restrictions than those contained in those agreements on the Issue Date;

(2) the indenture, the notes and the Note Guarantees;

(3) applicable law, rule, regulation, order, approval, permit or similar restriction;

(4) any instrument governing Indebtedness or Capital Stock of a Person acquired by W&T or any of its Restricted Subsidiaries as in effect at the time of such acquisition (except to the extent such Indebtedness or Capital Stock was incurred in connection with or in contemplation of such acquisition), which encumbrance

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or restriction is not applicable to any Person, or the properties or assets of any Person, other than the Person, or the property or assets of the Person, so acquired; provided that, in the case of Indebtedness, such Indebtedness was permitted by the terms of the indenture to be incurred;

(5) customary non-assignment provisions in contracts, leases and licenses (including, without limitation, licenses of intellectual property) entered into in the ordinary course of business;

(6) purchase money obligations for property (including Capital Stock) acquired in the ordinary course of business, Capital Lease Obligations and mortgage financings that impose restrictions on the property purchased or leased of the nature described in clause (3) of the preceding paragraph;

(7) any agreement for the sale or other disposition of assets, including without limitation an agreement for the sale or other disposition of the Capital Stock or assets of a Restricted Subsidiary that restricts distributions by the applicable Restricted Subsidiary pending the sale or other disposition;

(8) Liens permitted to be incurred under the provisions of the covenant described above under the caption “—Liens” that limit the right of the debtor to dispose of the assets subject to such Liens;

(9) provisions limiting the disposition or distribution of assets or property in joint venture agreements, asset sale agreements, sale-leaseback agreements, stock sale agreements and other similar agreements entered into (a) in the ordinary course of business consistent with past practice or (b) with the approval of W&T’s Board of Directors, which limitations are applicable only to the assets or property that are the subject of such agreements;

(10) other Indebtedness of W&T or any of its Restricted Subsidiaries permitted to be incurred pursuant to an agreement entered into subsequent to the Issue Date in accordance with the covenant described under the caption “—Incurrence of Indebtedness and Issuance of Preferred Stock”; provided that the provisions of such agreement relating to such dividend and other payment encumbrances or restrictions taken as a whole are not materially more restrictive, as determined by the Board of Directors or W&T in good faith, than those provisions contained in the agreements governing Existing Indebtedness and the Credit Agreement, in each case as in effect on the Issue Date;

(11) the issuance of preferred stock by a Restricted Subsidiary or the payment of dividends thereon in accordance with the terms thereof; provided that issuance of such preferred stock was made in accordance with the covenant described under the caption “—Incurrence of Indebtedness and Incurrence of Preferred Stock” and the terms of such preferred stock do not expressly restrict the ability of a Restricted Subsidiary to pay dividends or make any other distributions on its Capital Stock (other than requirements to pay dividends or liquidation preferences on such preferred stock prior to paying any dividends or making any other distributions on such other Capital Stock);

(12) supermajority voting requirements existing under corporate charters, bylaws, stockholders’ agreements and similar documents and agreements;

(13) customary provisions restricting subletting or assignment of any lease governing a leasehold interest;

(14) encumbrances or restrictions contained in Hedging Obligations permitted from time to time under the indenture; and

(15) restrictions on cash or other deposits or net worth imposed by customers under contracts entered into in the ordinary course of business.

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Merger, Consolidation or Sale of Assets

W&T will not, directly or indirectly: (1) consolidate or merge with or into another Person (whether or not W&T is the surviving corporation), or (2) sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of its properties and assets, in one or more related transactions, to another Person, unless:

(1) either: (a) W&T is the surviving corporation; or (b) the Person formed by or surviving any such consolidation or merger (if other than W&T) or to which such sale, assignment, transfer, conveyance or other disposition has been made is a corporation, limited liability company or limited partnership organized or existing under the laws of the United States, any state of the United States or the District of Columbia;

(2) the Person formed by or surviving any such consolidation or merger (if other than W&T) or the Person to which such sale, assignment, transfer, conveyance or other disposition has been made assumes all the obligations of W&T under the notes and the indenture pursuant to agreements reasonably satisfactory to the trustee; provided that, unless such Person is a corporation, a corporate co-issuer of the notes will be added to the indenture by agreements reasonably satisfactory to the trustee;

(3) immediately after such transaction or transactions, no Default or Event of Default exists; and

(4) W&T or the Person formed by or surviving any such consolidation or merger (if other than W&T), or to which such sale, assignment, transfer, conveyance or other disposition has been made, would on the date of such transaction after giving pro forma effect thereto and any related financing transactions as if the same had occurred at the beginning of the applicable four-quarter period, be permitted to incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test set forth in the first paragraph of the covenant described above under the caption “—Incurrence of Indebtedness and Issuance of Preferred Stock” or would have a Fixed Charge Coverage Ratio not less than the Fixed Charge Coverage Ratio of W&T immediately prior to such transaction.

For purposes of this covenant, the sale, lease, conveyance, assignment, transfer, or other disposition of all or substantially all of the properties and assets of one or more Subsidiaries of W&T, which properties and assets, if held by W&T instead of such Subsidiaries, would constitute all or substantially all of the properties and assets of W&T on a consolidated basis, shall be deemed to be the transfer of all or substantially all of the properties and assets of W&T.

The surviving entity will succeed to, and be substituted for, and may exercise every right and power of, W&T under the indenture, but, in the case of a lease of all or substantially all of its assets, W&T will not be released from the obligation to pay the principal of and interest and premium, if any, on the notes.

Although there is a limited body of case law interpreting the phrase “substantially all,” there is no precise established definition of the phrase under applicable law. Accordingly, in certain circumstances there may be a degree of uncertainty as to whether a particular transaction would involve “all or substantially all” of the property and assets of a Person.

Notwithstanding the restrictions described in the foregoing clause (4), any Restricted Subsidiary may consolidate with, merge into or transfer all or part of its properties and assets to W&T, W&T may merge into a Restricted Subsidiary for the purpose of reincorporating W&T in another jurisdiction, and any Restricted Subsidiary may consolidate with, merge into or transfer all or part of its properties and assets to another Restricted Subsidiary.

Transactions with Affiliates

W&T will not, and will not permit any of its Restricted Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise dispose of any of its properties or assets to, or purchase any property or assets from, or enter

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into or make or amend any transaction, contract, agreement, understanding, loan, advance or guarantee with, or for the benefit of, any Affiliate of W&T (each, an “Affiliate Transaction”), unless:

(1) the Affiliate Transaction is on terms that are no less favorable to W&T or the relevant Restricted Subsidiary than those that would have been obtained in a comparable transaction by W&T or such Restricted Subsidiary with an unrelated Person; and

(2) W&T delivers to the trustee:

(a) with respect to any Affiliate Transaction or series of related Affiliate Transactions involving aggregate consideration in excess of $20.0 million, an officers’ certificate certifying that such Affiliate Transaction complies with this covenant; and

(b) with respect to any Affiliate Transaction or series of related Affiliate Transactions involving aggregate consideration in excess of $40.0 million, a resolution of the Board of Directors of W&T set forth in an officers’ certificate certifying that such Affiliate Transaction complies with this covenant and that such Affiliate Transaction has been approved by a majority of the disinterested members of the Board of Directors of W&T.

The following items will not be deemed to be Affiliate Transactions and, therefore, will not be subject to the provisions of the prior paragraph:

(1) any employment agreement or arrangement, stock option or stock ownership plan, employee benefit plan, officer or director indemnification agreement, restricted stock agreement, severance agreement or other compensation plan or arrangement entered into by W&T or any of its Restricted Subsidiaries in the ordinary course of business and payments, awards, grants or issuances of securities pursuant thereto, including, without limitation, pursuant to W&T’s Long-Term Incentive Compensation Plan, as amended;

(2) transactions between or among W&T and/or its Restricted Subsidiaries;

(3) transactions with a Person (other than an Unrestricted Subsidiary of W&T) that is an Affiliate of W&T solely because W&T owns, directly or through a Restricted Subsidiary, an Equity Interest in such Person;

(4) reasonable fees and expenses and compensation paid to, and indemnity or insurance provided on behalf of, officers, directors or employees of W&T or any Restricted Subsidiaries as determined in good faith by the Board of Directors;

(5) any issuance of Equity Interests (other than Disqualified Stock) of W&T to, or receipt by W&T of a capital contribution from, Affiliates (or a Person that becomes an Affiliate) of W&T;

(6) Restricted Payments that do not violate the provisions of the indenture described above under the caption “—Restricted Payments”;

(7) transactions between W&T or any Restricted Subsidiaries and any Person, a director of which is also a director of W&T or any direct or indirect parent company of W&T and such director is the sole cause for such Person to be deemed an Affiliate of W&T or any Restricted Subsidiaries; provided, however, that such director abstains from voting as director of W&T or such direct or indirect parent company, as the case may be, on any matter involving such other Person;

(8) loans or advances to employees in the ordinary course of business or consistent with past practice not to exceed $5.0 million in the aggregate at any one time outstanding;

(9) advances to or reimbursements of employees for moving, entertainment and travel expenses, drawing accounts and similar expenditures in the ordinary course of business;

(10) any transaction in which W&T or any of its Restricted Subsidiaries, as the case may be, deliver to the trustee a letter from an accounting, appraisal or investment banking firm of national standing stating that such transaction is fair to W&T or such Restricted Subsidiary from a financial point of view or that such transaction meets the requirements of clause (1) of the preceding paragraph;

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(11) the performance of obligations of W&T or any of its Restricted Subsidiaries under the terms of any written agreement to which W&T or any of its Restricted Subsidiaries is a party on the Issue Date and which is described in this offering memorandum, as these agreements may be amended, modified or supplemented from time to time; provided, however, that any future amendment, modification or supplement entered into after the Issue Date will be permitted to the extent that its terms do not materially and adversely affect the rights of any holders of the notes (as determined in good faith by the Board of Directors of W&T) as compared to the terms of the agreements in effect on the Issue Date; and

(12)(a) guarantees of performance by W&T and its Restricted Subsidiaries of W&T’s Unrestricted Subsidiaries in the ordinary course of business, except for guarantees of Indebtedness in respect of borrowed money, and (b) pledges of Equity Interests of W&T’s Unrestricted Subsidiaries for the benefit of lenders of W&T’s Unrestricted Subsidiaries.

Additional Note Guarantees

If, after the Issue Date, any Domestic Subsidiary that is not already a Guarantor has Indebtedness outstanding in excess of a Minimum Amount or guarantees any other Indebtedness of W&T or of a Guarantor in excess of a Minimum Amount, then such Domestic Subsidiary will become a Guarantor with respect to the notes issued thereunder by executing and delivering a supplemental indenture, in the form attached as an exhibit to the indenture, to the trustee within 180 days of the date on which it guaranteed such Indebtedness.

Designation of Restricted and Unrestricted Subsidiaries

The Board of Directors of W&T may designate any Restricted Subsidiary to be an Unrestricted Subsidiary if that designation would not cause a Default. If a Restricted Subsidiary is designated as an Unrestricted Subsidiary, the aggregate Fair Market Value of all outstanding Investments owned by W&T and its Restricted Subsidiaries in the Subsidiary designated as Unrestricted will be deemed to be an Investment made as of the time of the designation and will reduce the amount available for Restricted Payments under the covenant described above under the caption “—Restricted Payments” or under one or more clauses of the definition of Permitted Investments, as determined by W&T. That designation will only be permitted if the Investment would be permitted at that time and if the Restricted Subsidiary otherwise meets the definition of an Unrestricted Subsidiary.

Any designation of a Subsidiary of W&T as an Unrestricted Subsidiary will be evidenced to the trustee by filing with the trustee a certified copy of a resolution of the Board of Directors of W&T giving effect to such designation and an officer’s certificate certifying that such designation complied with the preceding conditions and was permitted by the covenant described above under the caption “—Restricted Payments.” If, at any time, any Unrestricted Subsidiary would fail to meet the preceding requirements as an Unrestricted Subsidiary, it will thereafter cease to be an Unrestricted Subsidiary for purposes of the indenture and any Indebtedness of such Subsidiary will be deemed to be incurred by a Restricted Subsidiary of W&T as of such date and, if such Indebtedness is not permitted to be incurred as of such date under the covenant described under the caption “—Incurrence of Indebtedness and Issuance of Preferred Stock,” W&T will be in default of such covenant. The Board of Directors of W&T may at any time designate any Unrestricted Subsidiary to be a Restricted Subsidiary of W&T; provided that such designation will be deemed to be an incurrence of Indebtedness by a Restricted Subsidiary of W&T of any outstanding Indebtedness of such Unrestricted Subsidiary, and such designation will only be permitted if (1) such Indebtedness is permitted under the covenant described under the caption “—Incurrence of Indebtedness and Issuance of Preferred Stock,” calculated on a pro forma basis as if such designation had occurred at the beginning of the four-quarter reference period and (2) no Default or Event of Default would be in existence immediately following such designation.

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Reports

So long as any notes are outstanding, W&T will file with the SEC for public availability, within 30 days of the time periods specified in the SEC’s rules and regulations (unless the SEC will not accept such a filing, in which case W&T will furnish to the holders of notes or cause the trustee to furnish to the holders of notes, within the time periods specified in the SEC’s rules and regulations):

(1) all quarterly and annual reports that would be required to be filed with the SEC on Forms 10-Q and 10-K if W&T were required to file such reports; and

(2) all current reports that would be required to be filed with the SEC on Form 8-K if W&T were required to file such reports.

All such reports will be prepared in all material respects in accordance with all of the rules and regulations applicable to such reports. Each annual report on Form 10-K will include an audit report on W&T’s consolidated financial statements by a nationally recognized firm of independent accountants. W&T will conduct a conference call for holders of the notes, any prospective investor and any security analyst to discuss the information furnished pursuant to the previous paragraph no later than three business days after furnishing any information pursuant to clause (1) of the previous paragraph.

If, at any time, W&T is no longer subject to the periodic reporting requirements of the Exchange Act for any reason, W&T will nevertheless continue filing the reports specified in the preceding paragraphs of this covenant with the SEC within the time periods specified above unless the SEC will not accept such a filing. W&T will not take any action for the purpose of causing the SEC not to accept any such filings. If, notwithstanding the foregoing, the SEC will not accept W&T’s filings for any reason, W&T will post the reports referred to in the preceding paragraphs on its website within 30 days of the time periods that would apply if W&T were required to file those reports with the SEC.

If W&T has designated any of its Subsidiaries as Unrestricted Subsidiaries, then, to the extent material as determined by the Board of Directors of W&T in good faith, the quarterly and annual financial information required by the preceding paragraphs will include a reasonably detailed presentation, either on the face of the financial statements or in the footnotes thereto, and in Management’s Discussion and Analysis of Financial Condition and Results of Operations, of the financial condition and results of operations of W&T and its Restricted Subsidiaries separate from the financial condition and results of operations of the Unrestricted Subsidiaries of W&T.

In addition, W&T and the Guarantors agree that, for so long as any old notes remain outstanding, if at any time they are not required to file the reports required by the preceding paragraphs with the SEC, they will furnish to the holders of old notes and to securities analysts and prospective investors in the old notes, upon their request, the information required to be delivered pursuant to Rule 144A(d)(4) under the Securities Act.

Termination of Covenants

If on any date following the date of the indenture, (1) the notes are assigned an Investment Grade Rating from both Rating Agencies and (2) no Default or Event of Default shall have occurred and be continuing, then W&T and its Restricted Subsidiaries will no longer be subject to the following provisions of the indenture:

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Following the termination of the foregoing covenants, W&T’s Board of Directors may not designate any of its Subsidiaries as Unrestricted Subsidiaries pursuant to the covenant described below under the caption “—Designation of Restricted and Unrestricted Subsidiaries” or the second paragraph of the definition of “Unrestricted Subsidiary.”

There can be no assurance that the notes will achieve or maintain an Investment Grade Rating.

Events of Default and Remedies

Each of the following will be an Event of Default under the indenture:

(1) default for 30 days in the payment when due of interest on the notes;

(2) default in the payment when due (at maturity, upon redemption or otherwise) of the principal of, or premium, if any, on, the notes;

(3) failure by W&T or any of its Restricted Subsidiaries to comply with the provisions described under the captions “—Repurchase at the Option of Holders—Change of Control,” “—Repurchase at the Option of Holders—Asset Sales,” or “—Certain Covenants—Merger, Consolidation or Sale of Assets”;

(4) failure by W&T or any of its Restricted Subsidiaries for 60 days after notice to W&T by the trustee or the holders of at least 25% in aggregate principal amount of the notes then outstanding voting as a single class to comply with any of the other agreements in the indenture;

(5) default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by W&T or any of its Restricted Subsidiaries (or the payment of which is guaranteed by W&T or any of its Restricted Subsidiaries), whether such Indebtedness or Guarantee now exists, or is created after the date of the indenture, if that default:

(a) is caused by a failure to pay principal of, or interest or premium, if any, on, such Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the date of such default (a “Payment Default”); or

(b) results in the acceleration of such Indebtedness prior to its express maturity,

and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $20.0 million or more; provided that if any such default is cured or waived or any such acceleration rescinded, or such Indebtedness is repaid, within a period of 15 Business Days from the continuation of such default beyond the applicable grace period or the occurrence of such acceleration, as the case may be, such Event of Default and any consequential acceleration of the notes shall be automatically rescinded, so long as such rescission does not conflict with any judgment or decree;

(6) failure by W&T or any of its Restricted Subsidiaries to pay final judgments entered by a court or courts of competent jurisdiction aggregating in excess of $20.0 million (net of any amount with respect to which a reputable and solvent insurance company has acknowledged liability in writing), which judgments are not paid, discharged, stayed or fully bonded for a period of 60 days (or, if later, the date when payment is due pursuant to such judgment);

(7)(a) except as permitted by the indenture, any Note Guarantee is held in any judicial proceeding to be unenforceable or invalid or ceases for any reason to be in full force and effect, or (b) any Guarantor, or any Person acting on behalf of any Guarantor, denies or disaffirms its obligations under its Note Guarantee; and

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(8) certain events of bankruptcy or insolvency described in the indenture with respect to W&T or any of its Restricted Subsidiaries that is a Significant Subsidiary or any group of Restricted Subsidiaries that, taken together, would constitute a Significant Subsidiary.

In the case of an Event of Default arising from certain events of bankruptcy or insolvency with respect to W&T, any Restricted Subsidiary of W&T that is a Significant Subsidiary or any group of Restricted Subsidiaries of W&T that, taken together, would constitute a Significant Subsidiary, all outstanding notes will become due and payable immediately without further action or notice. If any other Event of Default occurs and is continuing, the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding notes may declare all of the notes to be due and payable immediately by notice in writing to W&T and, in the case of a notice by holders, also to the trustee specifying the applicable Events of Default and that it is a notice of acceleration.

Subject to certain limitations, holders of a majority in aggregate principal amount of the then outstanding notes may direct the trustee in its exercise of any trust or power. The trustee may withhold from holders of the notes notice of any continuing Default or Event of Default if it determines that withholding notice is in their interest, except a Default or Event of Default relating to the payment of principal, interest or premium, if any.

Subject to the provisions of the indenture relating to the duties of the trustee in case an Event of Default occurs and is continuing, the trustee will be under no obligation to exercise any of the rights or powers under the indenture at the request or direction of any holders of notes unless such holders have offered to the trustee reasonable indemnity or security against any loss, liability or expense. Except to enforce the right to receive payment of principal, premium, if any, or interest when due, no holder of a note may pursue any remedy with respect to the indenture or the notes unless:

(1) such holder has previously given the trustee notice that an Event of Default is continuing;

(2) holders of at least 25% in aggregate principal amount of the then outstanding notes have requested the trustee to pursue the remedy;

(3) such holders have offered the trustee reasonable indemnity against any loss, liability or expense;

(4) the trustee has not complied with such request within 60 days after the receipt of the request and the offer of indemnity; and

(5) holders of a majority in aggregate principal amount of the then outstanding notes have not given the trustee a direction inconsistent with such request within such 60-day period.

The holders of a majority in aggregate principal amount of the notes then outstanding by notice to the trustee may, on behalf of the holders of all of the notes, rescind an acceleration or waive any existing Default or Event of Default and its consequences under the indenture except a continuing Default or Event of Default in the payment of interest or premium on, or the principal of, the notes.

W&T and the Guarantors are required to deliver to the trustee annually a statement regarding compliance with the indenture. Upon becoming aware of any Default or Event of Default, W&T and the Guarantors are required within five days to deliver to the trustee a statement specifying such Default or Event of Default.

No Personal Liability of Directors, Officers, Employees and Stockholders

No director, officer, employee, incorporator, member, partner or stockholder of W&T or any Guarantor, as such, will have any liability for any obligations of W&T or the Guarantors under the notes, the indenture, the Note Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each holder of notes by accepting a note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the notes. The waiver may not be effective to waive liabilities under the federal securities laws.

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Legal Defeasance and Covenant Defeasance

W&T may at any time, at the option of its Board of Directors evidenced by a resolution set forth in an officers’ certificate, elect to have all of its obligations discharged with respect to the outstanding notes and all obligations of the Guarantors discharged with respect to their Note Guarantees (“Legal Defeasance”) except for:

(1) the rights of holders of outstanding notes to receive payments in respect of the principal of, or interest or premium on, such notes when such payments are due from the trust referred to below;

(2) W&T’s obligations with respect to the notes concerning issuing temporary notes, registration of notes, mutilated, destroyed, lost or stolen notes and the maintenance of an office or agency for payment and money for security payments held in trust;

(3) the rights, powers, trusts, duties and immunities of the trustee, and W&T’s and the Guarantors’ obligations in connection therewith; and

(4) the Legal Defeasance and Covenant Defeasance provisions of the indenture.

In addition, W&T may, at its option and at any time, elect to have the obligations of W&T and the Guarantors released with respect to certain covenants (including its obligation to make Change of Control Offers and Asset Sale Offers) that are described in the indenture (“Covenant Defeasance”) and thereafter any omission to comply with those covenants will not constitute a Default or Event of Default with respect to the notes. In the event Covenant Defeasance occurs, certain events (not including non-payment, bankruptcy, receivership, rehabilitation and insolvency events) described under “—Events of Default and Remedies” will no longer constitute an Event of Default with respect to the notes. If W&T exercises either its Legal Defeasance or Covenant Defeasance option, each Guarantor will be released and relieved of any obligations under its Note Guarantee and any security for the notes (other than the trust) will be released.

In order to exercise either Legal Defeasance or Covenant Defeasance:

(1) W&T must irrevocably deposit with the trustee, in trust, for the benefit of the holders of the notes, cash in U.S. dollars, non-callable Government Securities, or a combination of cash in U.S. dollars and non-callable Government Securities, in amounts as will be sufficient, in the opinion of a nationally recognized firm of independent public accountants, to pay the principal of, or interest and premium on, the outstanding notes on the stated date for payment thereof or on the applicable redemption date, as the case may be, and W&T must specify whether the notes are being defeased to such stated date for payment or to a particular redemption date;

(2) in the case of Legal Defeasance, W&T must deliver to the trustee an opinion of counsel reasonably acceptable to the trustee confirming that (a) W&T has received from, or there has been published by, the Internal Revenue Service a ruling or (b) since the date of the indenture, there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such opinion of counsel will confirm that, the holders of the outstanding notes will not recognize income, gain or loss for federal income tax purposes as a result of such Legal Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Legal Defeasance had not occurred;

(3) in the case of Covenant Defeasance, W&T must deliver to the trustee an opinion of counsel reasonably acceptable to the trustee confirming that the holders of the outstanding notes will not recognize income, gain or loss for federal income tax purposes as a result of such Covenant Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Covenant Defeasance had not occurred;

(4) no Default or Event of Default has occurred and is continuing on the date of such deposit (other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposit) and the deposit will not result in a breach or violation of, or constitute a default under, any other instrument to which W&T or any Guarantor is a party or by which W&T or any Guarantor is bound;

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(5) such Legal Defeasance or Covenant Defeasance will not result in a breach or violation of, or constitute a default under, any material agreement or instrument (other than the indenture) to which W&T or any of its Subsidiaries is a party or by which W&T or any of its Subsidiaries is bound;

(6) W&T must deliver to the trustee an officers’ certificate stating that the deposit was not made by W&T with the intent of preferring the holders of notes over the other creditors of W&T with the intent of defeating, hindering, delaying or defrauding any creditors of W&T or others; and

(7) W&T must deliver to the trustee an officers’ certificate and an opinion of counsel, each stating that all conditions precedent relating to the Legal Defeasance or the Covenant Defeasance have been complied with.

Amendment, Supplement and Waiver

Except as provided in the next two succeeding paragraphs, the indenture, the notes or the Note Guarantees may be amended or supplemented with the consent of the holders of at least a majority in aggregate principal amount of the notes then outstanding (including, without limitation, consents obtained in connection with a purchase of, or tender offer or exchange offer for, notes), and any existing Default or Event of Default or compliance with any provision of the indenture or the notes or the Note Guarantees may be waived with the consent of the holders of a majority in aggregate principal amount of the then outstanding notes (including, without limitation, consents obtained in connection with a purchase of, or tender offer or exchange offer for, notes).

Without the consent of each holder of notes affected, an amendment, supplement or waiver may not (with respect to any notes held by a non-consenting holder):

(1) reduce the principal amount of notes whose holders must consent to an amendment, supplement or waiver;

(2) reduce the principal of or change the fixed maturity of any note or alter the provisions with respect to the redemption of the notes (other than provisions relating to the covenants described above under the caption “—Repurchase at the Option of Holders”);

(3) reduce the rate of or change the time for payment of interest, including default interest, on any note;

(4) waive a Default or Event of Default in the payment of principal of, or interest or premium on, the notes (except a rescission of acceleration of the notes by the holders of a majority in aggregate principal amount of the then outstanding notes and a waiver of the payment default that resulted from such acceleration);

(5) make any note payable in money other than that stated in the notes;

(6) make any change in the provisions of the indenture relating to waivers of past Defaults or the rights of holders of notes to receive payments of principal of, or interest or premium on, the notes;

(7) waive a redemption payment with respect to any note (other than a payment required by one of the covenants described above under the caption “—Repurchase at the Option of Holders”);

(8) release any Guarantor from any of its obligations under its Note Guarantee or the indenture, except in accordance with the terms of the indenture; or

(9) make any change in the preceding amendment and waiver provisions.

Notwithstanding the preceding, without the consent of any holder of notes, W&T, the Guarantors and the trustee may amend or supplement the indenture, the notes or the Note Guarantees:

(1) to cure any ambiguity, defect or inconsistency;

(2) to provide for uncertificated notes in addition to or in place of certificated notes;

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(3) to provide for the assumption of W&T’s or a Guarantor’s obligations to holders of notes and Note Guarantees in the case of a merger or consolidation or sale of all or substantially all of W&T’s or such Guarantor’s properties and assets, as applicable;

(4) to make any change that would provide any additional rights or benefits to the holders of notes or that does not adversely affect the legal rights under the indenture of any such holder;

(5) to comply with requirements of the SEC in order to effect or maintain the qualification of the indenture under the Trust Indenture Act;

(6) to conform the text of the indenture, the Note Guarantees or the notes to any provision of the “Description of Notes” section in W&T’s offering memorandum dated June 3, 2011 relating to the old notes to the extent that such provision in such Description of Notes was intended to be a verbatim recitation of a provision of the indenture, the Note Guarantees or the notes;

(7) to provide for the issuance of additional notes in accordance with the limitations set forth in the indenture as of the date of the indenture;

(8) to allow any Guarantor to execute a supplemental indenture and/or a Note Guarantee with respect to the notes or release Note Guarantees pursuant to the terms of the indenture;

(9) to secure the notes; or

(10) to evidence and provide for the acceptance under the indenture of a successor trustee.

The consent of the holders is not necessary under the indenture to approve the particular form of any proposed amendment. It is sufficient if such consent approves the substance of the proposed amendment. After an amendment under the indenture becomes effective, W&T is required to mail to the holders a notice briefly describing such amendment. However, the failure to give such notice to all the holders, or any defect in the notice, will not impair or affect the validity of the amendment.

Satisfaction and Discharge

The indenture will be discharged and will cease to be of further effect as to all notes issued thereunder (except as to surviving rights of registration of transfer or exchange of the notes and as otherwise specified in the indenture), when:

(1) either:

(a) all notes that have been authenticated, except lost, stolen or destroyed notes that have been replaced or paid and notes for payment money has been deposited in trust and thereafter repaid to W&T, have been delivered to the trustee for cancellation; or

(b) all notes that have not been delivered to the trustee for cancellation have become due and payable by reason of the mailing of a notice of redemption or otherwise or will become due and payable within one year and W&T or any Guarantor has irrevocably deposited or caused to be deposited with the trustee as trust funds in trust solely for the benefit of the holders, cash in U.S. dollars, non-callable Government Securities, or a combination of cash in U.S. dollars and non-callable Government Securities, in amounts as will be sufficient without consideration of any reinvestment of interest, to pay and discharge the entire Indebtedness on the notes not delivered to the trustee for cancellation for principal, premium, if any, and accrued interest to the date of maturity or redemption;

(2) no Default or Event of Default has occurred and is continuing on the date of the deposit (other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposits), and the deposit will not result in a breach or violation of, or constitute a default under, any other instrument to which W&T or any of its Subsidiaries is a party or by which W&T or any of its Subsidiaries is bound;

(3) W&T or any Guarantor has paid or caused to be paid all sums payable by it under the indenture; and

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(4) W&T has delivered irrevocable instructions to the trustee under the indenture to apply the deposited money toward the payment of the notes at maturity or on the redemption date, as the case may be.

In addition, W&T must deliver an officers’ certificate and an opinion of counsel to the trustee stating that all conditions precedent to satisfaction and discharge have been satisfied.

Concerning the Trustee

If the trustee becomes a creditor of W&T or any Guarantor, the indenture limits the right of the trustee to obtain payment of claims in certain cases, or to realize on certain property received in respect of any such claim as security or otherwise. The trustee may be permitted to engage in other transactions; however, if it acquires any conflicting interest (as defined in the Trust Indenture Act), it must eliminate such conflict within 90 days, apply to the SEC for permission to continue as trustee (if the indenture has been qualified under the Trust Indenture Act) or resign.

The holders of a majority in aggregate principal amount of the then outstanding notes will have the right to direct the time, method and place of conducting any proceeding for exercising any remedy available to the trustee, subject to certain exceptions. The indenture provides that in case an Event of Default occurs and is continuing, the trustee will be required, in the exercise of its power, to use the degree of care of a prudent man in the conduct of his own affairs. Subject to such provisions, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request of any holder of notes, unless such holder has offered to the trustee security and indemnity satisfactory to it against any loss, liability or expense.

Book-Entry, Delivery and Form

The new notes will be issued initially only in the form of one or more global notes (collectively, the “Global Notes”). The Global Notes will be deposited upon issuance with the trustee as custodian for DTC and registered in the name of DTC or its nominee, in each case, for credit to an account of a direct or indirect participant in DTC as described below. Beneficial interests in the Global Notes may be held through the Euroclear System (“Euroclear”) and Clearstream Banking, S.A. (“Clearstream”) (as indirect participants in DTC). The Global Notes may be transferred, in whole and not in part, only to another nominee of DTC or to a successor of DTC or its nominee. Beneficial interests in the Global Notes may not be exchanged for definitive notes in registered certificated form (“Certificated Notes”) except in the limited circumstances described below. Please read “— Exchange of Global Notes for Certificated Notes.”

In addition, transfers of beneficial interests in the Global Notes will be subject to the applicable rules and procedures of DTC and its direct or indirect participants (including, if applicable, those of Euroclear and Clearstream), which may change from time to time.

Depository Procedures

The following description of the operations and procedures of DTC, Euroclear and Clearstream (as indirect participants in DTC) are provided solely as a matter of convenience. These operations and procedures are solely within the control of the respective settlement systems and are subject to changes by them. W&T takes no responsibility for these operations and procedures and urges investors to contact the system or their participants directly to discuss these matters.

DTC has advised W&T that DTC is a limited-purpose trust company created to hold securities for its participating organizations (collectively, the “Participants”) and to facilitate the clearance and settlement of transactions in those securities between the Participants through electronic book-entry changes in accounts of its Participants. The Participants include securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. Access to DTC’s system is also available to other entities such as banks, brokers, dealers and trust companies that clear through or maintain a custodial relationship with a

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Participant, either directly or indirectly (collectively, the “Indirect Participants”). Persons who are not Participants may beneficially own securities held by or on behalf of DTC only through the Participants or the Indirect Participants. The ownership interests in, and transfers of ownership interests in, each security held by or on behalf of DTC are recorded on the records of the Participants and Indirect Participants.

DTC has also advised W&T that, pursuant to procedures established by it:

(1) upon deposit of the Global Notes, DTC will credit the accounts of the Participants designated by the exchange agent with portions of the principal amount of the Global Notes; and

(2) ownership of these interests in the Global Notes will be shown on, and the transfer of ownership of these interests will be effected only through, records maintained by DTC (with respect to the Participants) or by the Participants and the Indirect Participants (with respect to other owners of beneficial interest in the Global Notes).

Investors in the Global Notes who are Participants may hold their interests therein directly through DTC. Investors in the Global Notes who are not Participants may hold their interests therein indirectly through organizations (including Euroclear and Clearstream) which are Participants. Those interests held through Euroclear or Clearstream may also be subject to the procedures and requirements of such systems. The laws of some jurisdictions may require that certain Persons take physical delivery in definitive form of securities that they own. Consequently, the ability to transfer beneficial interests in a Global Note to such Persons will be limited to that extent. Because DTC can act only on behalf of the Participants, which in turn act on behalf of the Indirect Participants, the ability of a Person having beneficial interests in a Global Note to pledge such interests to Persons that do not participate in the DTC system, or otherwise take actions in respect of such interests, may be affected by the lack of a physical certificate evidencing such interests.

Except as described below, owners of interests in the Global Notes will not have notes registered in their names, will not receive physical delivery of notes in certificated form and will not be considered the registered owners or “holders” thereof under the indenture for any purpose.

Payments in respect of the principal of, and interest and premium, if any, on a Global Note registered in the name of DTC or its nominee will be payable to DTC in its capacity as the registered holder under the indenture. Under the terms of the indenture, W&T and the trustee will treat the Persons in whose names the notes, including the Global Notes, are registered as the owners of the notes for the purpose of receiving payments and for all other purposes. Consequently, neither W&T, the trustee nor any agent of W&T or the trustee has or will have any responsibility or liability for:

(1) any aspect of DTC’s records or any Participant’s or Indirect Participant’s records relating to or payments made on account of beneficial ownership interest in the Global Notes or for maintaining, supervising or reviewing any of DTC’s records or any Participant’s or Indirect Participant’s records relating to the beneficial ownership interests in the Global Notes; or

(2) any other matter relating to the actions and practices of DTC or any of its Participants or Indirect Participants.

DTC has advised W&T that its current practice, upon receipt of any payment in respect of securities such as the notes (including principal and interest), is to credit the accounts of the relevant Participants with the payment on the payment date unless DTC has reason to believe that it will not receive payment on such payment date. Each relevant Participant is credited with an amount proportionate to its beneficial ownership of an interest in the principal amount of the relevant security as shown on the records of DTC. Payments by the Participants and the Indirect Participants to the beneficial owners of notes will be governed by standing instructions and customary practices and will be the responsibility of the Participants or the Indirect Participants and will not be the responsibility of DTC, the trustee or W&T. Neither W&T nor the trustee will be liable for any delay by DTC or

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any of the Participants or the Indirect Participants in identifying the beneficial owners of the notes, and W&T and the trustee may conclusively rely on and will be protected in relying on instructions from DTC or its nominee for all purposes.

Transfers between the Participants will be effected in accordance with DTC’s procedures, and will be settled in same-day funds, and transfers between participants in Euroclear and Clearstream will be effected in accordance with their respective rules and operating procedures.

Cross-market transfers between the Participants, on the one hand, and Euroclear or Clearstream participants, on the other hand, will be effected through DTC in accordance with DTC’s rules on behalf of Euroclear or Clearstream, as the case may be, by their respective depositaries; however, such cross-market transactions will require delivery of instructions to Euroclear or Clearstream, as the case may be, by the counterparty in such system in accordance with the rules and procedures and within the established deadlines (Brussels time) of such system. Euroclear or Clearstream, as the case may be, will, if the transaction meets its settlement requirements, deliver instructions to its respective depositary to take action to effect final settlement on its behalf by delivering or receiving interests in the relevant Global Note in DTC, and making or receiving payment in accordance with normal procedures for same-day funds settlement applicable to DTC. Euroclear participants and Clearstream participants may not deliver instructions directly to the depositories for Euroclear or Clearstream.

DTC has advised W&T that it will take any action permitted to be taken by a holder of notes only at the direction of one or more Participants to whose account DTC has credited the interests in the Global Notes and only in respect of such portion of the aggregate principal amount of the notes as to which such Participant or Participants has or have given such direction. However, if there is an Event of Default under the notes, DTC reserves the right to exchange the Global Notes for Certificated Notes, and to distribute such notes to its Participants.

Although DTC, Euroclear and Clearstream have agreed to the foregoing procedures to facilitate transfers of interests in the Rule 144A Global Notes and the Regulation S Global Notes among participants in DTC, Euroclear and Clearstream, they are under no obligation to perform or to continue to perform such procedures, and may discontinue such procedures at any time. None of W&T, the trustee and any of their respective agents will have any responsibility for the performance by DTC, Euroclear or Clearstream or their respective participants or indirect participants of their respective obligations under the rules and procedures governing their operations.

Exchange of Global Notes for Certificated Notes

A Global Note is exchangeable for Certificated Notes if:

(1) DTC (a) notifies W&T that it is unwilling or unable to continue as depositary for the Global Notes or (b) has ceased to be a clearing agency registered under the Exchange Act and, in either case, W&T fails to appoint a successor depositary;

(2) W&T, at its option, notifies the trustee in writing that it elects to cause the issuance of the Certificated Notes; or

(3) there has occurred and is continuing a Default or Event of Default with respect to the notes.

In addition, beneficial interests in a Global Note may be exchanged for Certificated Notes upon prior written notice given to the trustee by or on behalf of DTC in accordance with the indenture. In all cases, Certificated Notes delivered in exchange for any Global Note or beneficial interests in Global Notes will be registered in the names, and issued in any approved denominations, requested by or on behalf of the depositary (in accordance with its customary procedures).

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Exchange of Certificated Notes for Global Notes

Certificated Notes may not be exchanged for beneficial interests in any Global Note except in the limited circumstances provided in the Indenture.

Same-Day Settlement and Payment

W&T will make payments in respect of the notes represented by the Global Notes (including principal, premium, if any, and interest) by wire transfer of immediately available funds to the accounts specified by DTC or its nominee. W&T will make all payments of principal, interest and premium, if any, with respect to Certificated Notes by wire transfer of immediately available funds to the accounts specified by the holders of the Certificated Notes or, if no such account is specified, by mailing a check to each such holder’s registered address. The notes represented by the Global Notes are expected to be eligible to trade in DTC’s Same-Day Funds Settlement System, and any permitted secondary market trading activity in such notes will, therefore, be required by DTC to be settled in immediately available funds. W&T expects that secondary trading in any Certificated Notes will also be settled in immediately available funds.

Because of time zone differences, the securities account of a Euroclear or Clearstream participant purchasing an interest in a Global Note from a Participant will be credited, and any such crediting will be reported to the relevant Euroclear or Clearstream participant, during the securities settlement processing day (which must be a business day for Euroclear and Clearstream) immediately following the settlement date of DTC. DTC has advised W&T that cash received in Euroclear or Clearstream as a result of sales of interests in a Global Note by or through a Euroclear or Clearstream participant to a Participant will be received with value on the settlement date of DTC but will be available in the relevant Euroclear or Clearstream cash account only as of the business day for Euroclear or Clearstream following DTC’s settlement date.

Certain Definitions

Set forth below are certain defined terms used in the indenture. Reference is made to the indenture for a full disclosure of all defined terms used therein, as well as any other capitalized terms used herein for which no definition is provided.

“Acquired Debt” means, with respect to any specified Person:

(1) Indebtedness of any other Person existing at the time such other Person is merged with or into or became a Subsidiary of such specified Person, whether or not such Indebtedness is incurred in connection with, or in contemplation of, such other Person merging with or into, or becoming a Restricted Subsidiary of, such specified Person, but excluding Indebtedness which is extinguished, retired or repaid in connection with such Person merging with or becoming a Subsidiary of such specified Person; and

(2) Indebtedness secured by a Lien encumbering any asset acquired by such specified Person.

“Additional Assets” means:

(1) any assets that are not classified as current assets under GAAP and that are used or useful in the Oil and Gas Business, other than Indebtedness or Capital Stock;

(2) the Capital Stock of a Person that becomes a Restricted Subsidiary as a result of the acquisition of such Capital Stock by W&T or any of its Restricted Subsidiaries; or

(3) Capital Stock constituting a minority interest in any Person that at such time is a Restricted Subsidiary;

provided, however, that any such Restricted Subsidiary described in clause (2) or (3) is primarily engaged in the Oil and Gas Business.

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“Adjusted Consolidated Net Tangible Assets” means (without duplication), as of the date of determination:

(1) the sum of:

(a) discounted future net revenue from proved crude oil and natural gas reserves of W&T and its Restricted Subsidiaries calculated in accordance with SEC guidelines before any state or federal income taxes, as estimated in a reserve report prepared as of the end of the fiscal year ending at least 91 days prior to the date of determination, which reserve report is prepared, reviewed or audited by independent petroleum engineers as increased by, as of the date of determination, the discounted future net revenue of:

(i) estimated proved crude oil and natural gas reserves of W&T and its Restricted Subsidiaries attributable to acquisitions consummated since the date of such reserve report, and

(ii) estimated crude oil and natural gas reserves of W&T and its Restricted Subsidiaries attributable to extensions, discoveries and other additions and upward determinations of estimates of proved crude oil and natural gas reserves (including previously estimated development costs incurred during the period and the accretion of discount since the prior period end) due to exploration, development or exploitation, production or other activities which reserves were not reflected in such reserve report which would, in accordance with standard industry practice, result in such determinations, in each case calculated in accordance with SEC guidelines (utilizing the prices utilized in such year-end reserve report),

and decreased by, as of the date of determination, the discounted future net revenue attributable to:

(iii) estimated proved crude oil and natural gas reserves of W&T and its Restricted Subsidiaries reflected in such reserve report produced or disposed of since the date of such reserve report, and

(iv) reductions in the estimated oil and natural gas reserves of W&T and its Restricted Subsidiaries reflected in such reserve report since the date of such reserve report attributable to downward determinations of estimates of proved crude oil and natural gas reserves due to exploration, development or exploitation, production or other activities conducted or otherwise occurring since the date of such reserve report which would, in accordance with standard industry practice, result in such determinations, in each case calculated in accordance with SEC guidelines (utilizing the prices utilized in such reserve report);

provided, however, that, in the case of each of the determinations made pursuant to clauses (i) through (iv), such increases and decreases shall be estimated by W&T’s engineers;

(b) the capitalized costs that are attributable to crude oil and natural gas properties of W&T and its Restricted Subsidiaries to which no proved crude oil and natural gas reserves are attributable, based on W&T’s books and records as of a date no earlier than the date of W&T’s latest available annual or quarterly financial statements;

(c) the Net Working Capital (excluding, to the extent included in the determination of discounted future net revenues under clause (1)(a) above, any adjustments made pursuant to the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (ASC) Topic 410-20 as of a date no earlier than the date of W&T’s latest available annual or quarterly financial statements; and

(d) the greater of (i) the net book value as of a date no earlier than the date of W&T’s latest available annual or quarterly financial statements and (ii) the appraised value, as estimated by independent appraisers, of other tangible assets of W&T and its Restricted Subsidiaries as of a date no earlier than the date of W&T’s latest available annual or quarterly financial statements (provided that W&T shall not be required to obtain such an appraisal of such assets if no such appraisal has been performed); minus

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(2) the sum of:

(a) Minority Interests;

(b) any net natural gas balancing liabilities of W&T and its Restricted Subsidiaries reflected in W&T’s latest audited financial statements;

(c) to the extent included in clause (1)(a) above, the discounted future net revenue, calculated in accordance with SEC guidelines (utilizing the same prices in W&T’s year-end reserve report), attributable to reserves subject to participation interests, overriding royalty interests or other interests of third parties, pursuant to participation, partnership, vendor financing or other agreements then in effect, or which otherwise are required to be delivered to third parties;

(d) to the extent included in clause (1)(a) above, the discounted future net revenue calculated in accordance with SEC guidelines (utilizing the same prices utilized in W&T’s year-end reserve report), attributable to reserves that are required to be delivered to third parties to fully satisfy the obligations of W&T and its Restricted Subsidiaries with respect to Volumetric Production Payments on the schedules specified with respect thereto; and

(e) the discounted future net revenue, calculated in accordance with SEC guidelines, attributable to reserves subject to Dollar-Denominated Production Payments that, based on the estimates of production included in determining the discounted future net revenue specified in the immediately preceding clause (i)(a) (utilizing the same prices utilized in W&T’s year-end reserve report), would be necessary to satisfy fully the obligations of W&T and its Restricted Subsidiaries with respect to Dollar-Denominated Production Payments on the schedules specified with respect thereto.

If W&T changes its method of accounting from the full cost method to the successful efforts method or a similar method of accounting, “Adjusted Consolidated Net Tangible Assets” will continue to be calculated as if W&T were still using the full cost method of accounting.

“Affiliate” of any specified Person means any other Person directly or indirectly controlling or controlled by or under direct or indirect common control with such specified Person. For purposes of this definition, “control,” as used with respect to any Person, means the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of such Person, whether through the ownership of voting securities, by agreement or otherwise. For purposes of this definition, the terms “controlling,” “controlled by” and “under common control with” have correlative meanings.

“Applicable Premium” means, with respect to a note at any redemption date, the excess of (1) the present value at such time of (a) redemption price of such note as of June 15, 2015 (without regard to accrued and unpaid interest) plus (b) all required interest payments due on such note through June 15, 2015 (excluding accrued and unpaid interest to the redemption date), computed using a discount rate equal to the Treasury Rate plus 50 basis points, over (2) the principal amount of such note.

“Asset Sale” means:

(1) the sale, lease, conveyance or other disposition of any assets (including by way of a Production Payment and Reserve Sale or a sale and leaseback transaction); provided that the sale, lease, conveyance or other disposition of all or substantially all of the assets of W&T and its Restricted Subsidiaries taken as a whole will be governed by the provisions of the indenture described above under the caption “—Repurchase at the Option of Holders—Change of Control” and/or the provisions described above under the caption “—Certain Covenants—Merger, Consolidation or Sale of Assets” and not by the provisions of the Asset Sale covenant; and

(2) the issuance of Equity Interests in any of W&T’s Restricted Subsidiaries or the sale of Equity Interests held by W&T or any of its Subsidiaries in any of its other Subsidiaries.

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Notwithstanding the preceding, none of the following items will be deemed to be an Asset Sale:

(1) any single transaction or series of related transactions that involves assets having a Fair Market Value of less than $25.0 million;

(2) a transfer of assets between or among W&T and its Restricted Subsidiaries;

(3) an issuance of Equity Interests by a Restricted Subsidiary of W&T to W&T or to a Restricted Subsidiary of W&T;

(4) the disposition of products, services, inventory or accounts receivable in the ordinary course of business and any sale or other disposition of damaged, worn-out or obsolete assets in the ordinary course of business;

(5) the sale or other disposition of cash or Cash Equivalents;

(6) a Restricted Payment that does not violate the covenant described above under the caption “—Certain Covenants—Restricted Payments”;

(7) Permitted Investments, including, without limitation, unwinding Hedging Obligations;

(8) a disposition of Hydrocarbons or mineral products inventory in the ordinary course of business;

(9) the sale or other disposition (whether or not in the ordinary course of business) of crude oil and natural gas properties or direct or indirect interests in real property; provided, that at the time of such sale or disposition such properties do not have associated with them any proved reserves;

(10) the farm-out, lease or sublease of developed or undeveloped crude oil or natural gas properties owned or held by W&T or such Restricted Subsidiary in exchange for crude oil and natural gas properties owned or held by another Person;

(11) any trade or exchange by W&T or any Restricted Subsidiaries of oil and gas properties or other properties or assets for oil and gas properties or other properties or assets owned or held by another Person, provided that the fair market value of the properties or assets traded or exchanged by W&T or such Restricted Subsidiary (together with any cash) is reasonably equivalent to the fair market value of the properties or assets (together with any cash) to be received by W&T or such Restricted Subsidiary, and provided further that any net cash received must be applied in accordance with the provisions described above under the caption “—Repurchase at the Option of Holders—Asset Sales;”

(12) the creation or perfection of a Lien (but not, except to the extent contemplated in clause (13) below, the sale or other disposition of the properties or assets subject to such Lien);

(13) the creation or perfection of a Permitted Lien and the exercise by any Person in whose favor a Permitted Lien is granted of any of its rights in respect of that Permitted Lien;

(14) the licensing or sublicensing of intellectual property, including, without limitation, licenses for seismic data, in the ordinary course of business and which do not materially interfere with the business of W&T and its Restricted Subsidiaries; and

(15) a surrender or waiver of contract rights or the settlement, release or surrender of contract, tort or other claims of any kind.

“Attributable Debt” in respect of a sale and leaseback transaction means, at the time of determination, the present value of the obligation of the lessee for net rental payments during the remaining term of the lease included in such sale and leaseback transaction including any period for which such lease has been extended or may, at the option of the lessor, be extended. Such present value shall be calculated using a discount rate equal to the rate of interest implicit in such transaction, determined in accordance with GAAP.

“Beneficial Owner” has the meaning assigned to such term in Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that in calculating the beneficial ownership of any particular “person” (as that term is used in Section 13(d)(3) of the Exchange Act), such “person” will be deemed to have beneficial ownership of all

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securities that such “person” has the right to acquire by conversion or exercise of other securities, whether such right is currently exercisable or is exercisable only after the passage of time. The terms “Beneficial Ownership,” “Beneficially Owns” and “Beneficially Owned” have a corresponding meaning.

“Board of Directors” means:

(1) with respect to a corporation, the board of directors of the corporation or any committee thereof duly authorized to act on behalf of such board;

(2) with respect to a partnership, the Board of Directors of the general partner of the partnership;

(3) with respect to a limited liability company, the managing member or members or any controlling committee of managing members thereof; and

(4) with respect to any other Person, the board or committee of such Person serving a similar function.

“Business Day” means each day that is not a Saturday, Sunday or other day on which banking institutions in New York, New York or another place of payment are authorized or required by law to close.

“Capital Lease Obligation” means, at the time any determination is to be made, the amount of the liability in respect of a capital lease that would at that time be required to be capitalized on a balance sheet prepared in accordance with GAAP, and the Stated Maturity thereof shall be the date of the last payment of rent or any other amount due under such lease prior to the first date upon which such lease may be prepaid by the lessee without payment of a penalty.

“Capital Stock” means:

(1) in the case of a corporation, corporate stock;

(2) in the case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock;

(3) in the case of a partnership or limited liability company, partnership interests (whether general or limited) or membership interests; and

(4) any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person, but excluding from all of the foregoing any debt securities convertible into Capital Stock, whether or not such debt securities include any right of participation with Capital Stock.

“Cash Equivalents” means:

(1) United States dollars;

(2) securities issued or directly and fully guaranteed or insured by the United States government or any agency or instrumentality of the United States government (provided that the full faith and credit of the United States is pledged in support of those securities) having maturities of not more than one year from the date of acquisition;

(3) marketable general obligations issued by any state of the United States of America or any political subdivision of any such state or any public instrumentality thereof maturing within one year from the date of acquisition thereof and, at the time of acquisition thereof, having a credit rating of “A” or better from either S&P or Moody’s;

(4) certificates of deposit, demand deposit accounts and eurodollar time deposits with maturities of one year or less from the date of acquisition, bankers’ acceptances with maturities not exceeding one year and overnight bank deposits, in each case, with any domestic commercial bank having capital and surplus in excess of $500.0 million and a Thomson Bank Watch Rating of “B” or better;

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(5) repurchase obligations with a term of not more than seven days for underlying securities of the types described in clauses (2), (3) and (4) above entered into with any financial institution meeting the qualifications specified in clause (4) above;

(6) commercial paper having one of the two highest ratings obtainable from Moody’s or S&P and, in each case, maturing within nine months after the date of acquisition; and

(7) money market funds at least 95% of the assets of which constitute Cash Equivalents of the kinds described in clauses (1) through (6) of this definition.

“Change of Control” means the occurrence of any of the following:

(1) the direct or indirect sale, lease, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or substantially all of the properties and assets of W&T and its Subsidiaries taken as a whole to any “person” (as that term is used in Section 13(d) of the Exchange Act) other than the Principals or a Related Party of the Principals;

(2) the adoption of a plan relating to the liquidation or dissolution of W&T;

(3) the consummation of any transaction (including, without limitation, any merger or consolidation), the result of which is that any “person” (as defined above), other than the Principals or a Related Party of the Principals becomes the Beneficial Owner, directly or indirectly, of more than 50% of the Voting Stock of W&T, measured by voting power rather than number of shares; or

(4) the first day on which the Continuing Directors cease to constitute a majority of the Board of Directors of W&T.

“Consolidated Cash Flow” means, with respect to any specified Person for any period, the Consolidated Net Income of such Person for such period plus, without duplication:

(1) an amount equal to any extraordinary loss plus any net loss realized by such Person or any of its Restricted Subsidiaries in connection with an Asset Sale (together with any related provision for taxes and any related non-recurring charges relating to any premium or penalty paid, write-off of deferred financing costs or other financial recapitalization charges in connection with redeeming or retiring any Indebtedness prior to its Stated Maturity), to the extent such losses were deducted in computing such Consolidated Net Income; plus

(2) provision for taxes based on income or profits of such Person and its Restricted Subsidiaries for such period, to the extent that such provision for taxes was deducted in computing such Consolidated Net Income; plus

(3) the Fixed Charges of such Person and its Restricted Subsidiaries for such period, to the extent that such Fixed Charges were deducted in computing such Consolidated Net Income; plus

(4) depreciation, depletion, amortization (including amortization of intangibles but excluding amortization of prepaid cash expenses that were paid in a prior period), impairment and other non-cash expenses (excluding any such non-cash expense to the extent that it represents an accrual of or reserve for cash expenses in any future period or amortization of a prepaid cash expense that was paid in a prior period) of such Person and its Restricted Subsidiaries for such period to the extent that such depreciation, depletion, amortization, impairment and other non-cash expenses were deducted in computing such Consolidated Net Income; minus

(5) non-cash items increasing such Consolidated Net Income for such period, other than items that were accrued in the ordinary course of business; minus

(6) to the extent included in determining Consolidated Net Income, the sum of (a) the amount of deferred revenues that are amortized during such period and are attributable to reserves that are subject to Volumetric Production Payments and (b) amounts recorded in accordance with GAAP as repayments of principal and interest pursuant to Dollar-Denominated Production Payments,

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in each case, on a consolidated basis and determined in accordance with GAAP.

Notwithstanding the foregoing, the provision for taxes based on the income or profits of, and the depreciation, depletion and amortization and other non-cash charges and expenses of, a Restricted Subsidiary of W&T shall be added to Consolidated Net Income to compute Consolidated Cash Flow of W&T only to the extent (and in the same proportion) that the Net Income of such Restricted Subsidiary was included in calculating the Consolidated Net Income of such Person and only if a corresponding amount would be permitted at the date of determination to be dividended to W&T by such Restricted Subsidiary without prior governmental approval (that has not been obtained), and without direct or indirect restriction pursuant to the terms of its charter and all agreements, instruments, judgments, decrees, orders, statutes, rules and governmental regulations applicable to that Restricted Subsidiary or its stockholders.

“Consolidated Net Income” means, with respect to any specified Person for any period, the aggregate of the Net Income of such Person and its Restricted Subsidiaries for such period, on a consolidated basis, determined in accordance with GAAP; provided that:

(1) the Net Income (but not loss) of any Person that is not a Restricted Subsidiary or that is accounted for by the equity method of accounting will be included only to the extent of the amount of dividends or similar distributions paid in cash to the specified Person or a Restricted Subsidiary of the Person;

(2) the Net Income of any Restricted Subsidiary will be excluded to the extent that the declaration or payment of dividends or similar distributions by that Restricted Subsidiary of that Net Income is not at the date of determination permitted without any prior governmental approval (that has not been obtained) or, directly or indirectly, by operation of the terms of its charter or any agreement, instrument, judgment, decree, order, statute, rule or governmental regulation applicable to that Restricted Subsidiary or its stockholders, partners or members;

(3) the cumulative effect of a change in accounting principles will be excluded;

(4) income resulting from transfers of assets (other than cash) between such Person or any of its Restricted Subsidiaries, on the one hand, and an Unrestricted Subsidiary, on the other hand, will be excluded;

(5) any non-cash compensation charge arising from any grant of stock, stock options or other equity based awards will be excluded;

(6) any asset impairment writedowns on oil and gas properties under GAAP or SEC guidelines will be excluded;

(7) any unrealized non-cash gains or losses or charges in respect of hedge or non-hedge derivatives (including those resulting from the application of FASB ASC Topic 815) will be excluded; and

(8) to the extent deducted in the calculation of Net Income, any non-cash or nonrecurring charges associated with any premium or penalty paid, write-off of deferred financing costs or other financial recapitalization charges in connection with redeeming or retiring any Indebtedness prior to its Stated Maturity will be excluded.

“Consolidated Net Worth” means, with respect to any specified Person as of any date, the sum of:

(1) the consolidated equity of the common stockholders of such Person and its consolidated Subsidiaries as of such date; plus

(2) the respective amounts reported on such Person’s balance sheet as of such date with respect to any series of preferred stock (other than Disqualified Stock) that by its terms is not entitled to the payment of dividends unless such dividends may be declared and paid only out of net earnings in respect of the year of such declaration and payment, but only to the extent of any cash received by such Person upon issuance of such preferred stock.

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“Continuing Directors” means, as of any date of determination, any member of the Board of Directors of W&T who:

(1) was a member of such Board of Directors on the Issue Date; or

(2) was nominated for election or elected to such Board of Directors with the approval of a majority of the Continuing Directors who were members of such Board of Directors at the time of such nomination or election.

“Credit Agreement” means the Third Amended and Restated Credit Agreement, dated as of May 26, 2006, as amended as of the Issue Date, by and among W&T, as borrower, Toronto Dominion (Texas) LLC, as agent, Lehman Commercial Paper Inc., as syndication agent, and the lenders from time to time party thereto, providing for up to $1.3 billion of revolving credit and term loan borrowings and letters of credit, including any related notes, Guarantees, collateral documents, instruments and agreements executed in connection therewith, and, in each case, as amended, restated, modified, renewed, refunded, replaced (whether upon or after termination or otherwise), supplemented or refinanced (including by means of sales of debt securities to institutional investors) in whole or in part from time to time.

“Credit Facilities” means, with respect to W&T or any of its Restricted Subsidiaries, one or more current or future debt facilities (including, without limitation, the Credit Agreement) or commercial paper facilities with banks, investment banks, insurance companies, mutual funds, other institutional lenders, institutional investors or any of the foregoing providing for revolving credit loans, term loans, receivables financing (including through the sale of receivables to such lenders, or to special purpose entities formed to borrow from (or sell such receivables to) such lenders against such receivables), letters of credit, bankers’ acceptances, or other borrowings, in each case, as amended, restated, modified, renewed, refunded, replaced or refinanced (in each case, without limitation as to amount), in whole or in part, from time to time and any agreements and related documents governing Indebtedness or other Obligations incurred to refinance amounts then outstanding or permitted to be outstanding, (whether upon or after termination or otherwise) (including by means of sales of debt securities to institutional investors) in whole or in part from time to time.

“Default” means any event that is, or with the passage of time or the giving of notice or both would be, an Event of Default.

“Disqualified Stock” means any Capital Stock that, by its terms (or by the terms of any security into which it is convertible, or for which it is exchangeable, in each case, at the option of the holder of the Capital Stock), or upon the happening of any event, matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or redeemable at the option of the holder of the Capital Stock, in whole or in part, on or prior to the date that is 91 days after the date on which the notes mature; provided, that only the portion of Capital Stock which so matures or is mandatorily redeemable, or is so redeemable at the option of the holder thereof prior to such date, will be deemed to be Disqualified Stock. Notwithstanding the preceding sentence, any Capital Stock that would constitute Disqualified Stock solely because the holders of the Capital Stock have the right to require W&T to repurchase such Capital Stock upon the occurrence of a change of control or an asset sale will not constitute Disqualified Stock if the terms of such Capital Stock provide that W&T may not repurchase or redeem any such Capital Stock pursuant to such provisions unless such repurchase or redemption complies with the covenant described above under the caption “—Certain Covenants—Restricted Payments.” The amount of Disqualified Stock deemed to be outstanding at any time for purposes of the indenture will be the maximum amount that W&T and its Restricted Subsidiaries may become obligated to pay upon the maturity of, or pursuant to any mandatory redemption provisions of, such Disqualified Stock, exclusive of accrued dividends.

“Dollar-Denominated Production Payments” means production payment obligations recorded as liabilities in accordance with GAAP, together with all undertakings and obligations in connection therewith.

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“Domestic Subsidiary” means any Restricted Subsidiary of W&T (1) that was formed under the laws of the United States or any state of the United States or the District of Columbia or (2) that Guarantees Indebtedness of W&T or of a Guarantor in excess of a Minimum Amount.

“Equity Interests” means Capital Stock and all warrants, options or other rights to acquire Capital Stock (but excluding any debt security that is convertible into, or exchangeable for, Capital Stock).

“Equity Offering” means any public or private sale of Capital Stock (other than Disqualified Stock) by W&T after the Issue Date.

“Existing Indebtedness” means Indebtedness of W&T and its Subsidiaries (other than Indebtedness under the Credit Agreement or intercompany Indebtedness) in existence on the date of the indenture, until such amounts are repaid.

“Fair Market Value” means the value that would be paid by a willing buyer to an unaffiliated willing seller in a transaction not involving distress or necessity of either party, determined in good faith by the Board of Directors of W&T (unless the value is less than $10.0 million, in which case it may be determined by an officer of W&T), which determination will be conclusive for all purposes under the indenture.

“Fixed Charge Coverage Ratio” means with respect to any specified Person for any period, the ratio of the Consolidated Cash Flow of such Person for such period to the Fixed Charges of such Person for such period. In the event that the specified Person or any of its Restricted Subsidiaries incurs, assumes, guarantees, repays, repurchases, redeems, defeases or otherwise discharges any Indebtedness (other than ordinary working capital borrowings) or issues, repurchases or redeems preferred stock subsequent to the commencement of the period for which the Fixed Charge Coverage Ratio is being calculated and on or prior to the date on which the event for which the calculation of the Fixed Charge Coverage Ratio is made (the “Calculation Date”), then the Fixed Charge Coverage Ratio will be calculated giving pro forma effect to such incurrence, assumption, Guarantee, repayment, repurchase, redemption, defeasance or other discharge of Indebtedness, or such issuance, repurchase or redemption of preferred stock, and the use of the proceeds therefrom, as if the same had occurred at the beginning of the applicable four-quarter reference period.

In addition, for purposes of calculating the Fixed Charge Coverage Ratio:

(1) acquisitions that have been made by the specified Person or any of its Restricted Subsidiaries, including through mergers, consolidations or otherwise (including acquisitions of assets used or useful in the Oil and Gas Business), or any Person or any of its Restricted Subsidiaries acquired by the specified Person or any of its Restricted Subsidiaries, and including any related financing transactions and including increases in ownership of Restricted Subsidiaries, during the four-quarter reference period or subsequent to such reference period and on or prior to the Calculation Date, shall be deemed to have occurred on the first day of the four-quarter reference period and the Consolidated Cash Flow for such reference period will be calculated giving pro forma effect to any expense and cost reductions that have occurred or, in the reasonable judgment of the chief financial officer of W&T, are reasonably expected to occur (regardless of whether those operating improvements or cost savings could then be reflected in pro forma financial statements prepared in accordance with Regulation S-X under the Securities Act or any other regulation or policy of the SEC related thereto);

(2) the Consolidated Cash Flow attributable to discontinued operations, as determined in accordance with GAAP, and operations or businesses (and ownership interests therein) disposed of prior to the Calculation Date, will be excluded;

(3) the Fixed Charges attributable to discontinued operations, as determined in accordance with GAAP, and operations or businesses (and ownership interests therein) disposed of prior to the Calculation Date, will be excluded, but only to the extent that the obligations giving rise to such Fixed Charges will not be obligations of the specified Person or any of its Restricted Subsidiaries following the Calculation Date;

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(4) any Person that is a Restricted Subsidiary on the Calculation Date will be deemed to have been a Restricted Subsidiary at all times during such four-quarter period;

(5) any Person that is not a Restricted Subsidiary on the Calculation Date will be deemed not to have been a Restricted Subsidiary at any time during such four-quarter period; and

(6) if any Indebtedness bears a floating rate of interest, the interest expense on such Indebtedness will be calculated as if the rate in effect on the Calculation Date had been the applicable rate for the entire period (taking into account any Hedging Obligation applicable to such Indebtedness if such Hedging Obligation has a remaining term as at the Calculation Date in excess of 12 months).

“Fixed Charges” means, with respect to any specified Person for any period, the sum, without duplication, of:

(1) the consolidated interest expense of such Person and its Restricted Subsidiaries for such period, whether paid or accrued (excluding any interest attributable to Dollar-Denominated Production Payments but including, without limitation, amortization of debt issuance costs and original issue discount, non-cash interest payments, the interest component of any deferred payment obligations, the interest component of all payments associated with Capital Lease Obligations, imputed interest with respect to Attributable Debt, commissions, discounts and other fees and charges incurred in respect of letter of credit or bankers’ acceptance financings), and net of the effect of all payments made or received pursuant to Hedging Obligations in respect of interest rates; plus

(2) the consolidated interest expense of such Person and its Restricted Subsidiaries that was capitalized during such period; plus

(3) any interest on Indebtedness of another Person that is guaranteed by such Person or one of its Restricted Subsidiaries or secured by a Lien on assets of such Person or one of its Restricted Subsidiaries, whether or not such Guarantee or Lien is called upon; plus

(4) all dividends, whether paid or accrued and whether or not in cash, on any series of preferred stock of such Person or any of its Restricted Subsidiaries, other than dividends on Equity Interests payable solely in Equity Interests of W&T (other than Disqualified Stock) or to W&T or a Restricted Subsidiary of W&T.

“GAAP” means generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other entity as have been approved by a significant segment of the accounting profession, which are in effect from time to time.

“Government Securities” means securities that are:

(1) direct obligations of the United States of America for the timely payment of which its full faith and credit is pledged; or

(2) obligations of a Person controlled or supervised by and acting as an agency or instrumentality of the United States of America, the timely payment of which is unconditionally guaranteed as a full faith and credit obligation by the United States of America

that, in either case, are not callable or redeemable at the option of the issuer thereof, and shall also include a depository receipt issued by a bank (as defined in Section 3(a) of the Securities Act), as custodian, with respect to any such Government Security or a specific payment of principal of or interest on any such Government Security held by such custodian for the account of the holder of such depository receipt; provided, however, that (except as required by law) such custodian is not authorized to make any deduction from the amount payable to the holder of such depository receipt from any amount received by the custodian in respect of the Government Security or the specific payment of principal of or interest on the Government Security evidenced by such depository receipt.

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“Guarantee” means a guarantee other than by endorsement of negotiable instruments for collection in the ordinary course of business, direct or indirect, in any manner including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in respect thereof, of all or any part of any Indebtedness (whether arising by virtue of partnership arrangements, or by agreements to keep-well, to maintain financial statement conditions or otherwise), or entered into for purposes of assuring in any other manner the obligee of such Indebtedness of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part).

“Guarantors” means:

(1) each Subsidiary of W&T that executed the indenture on the Issue Date; and

(2) any other Restricted Subsidiary of W&T that becomes a Guarantor in accordance with the provisions of the indenture,

and their respective successors and assigns, in each case, until the Note Guarantee of such Person has been released in accordance with the provisions of the indenture.

“Hedging Obligations” means, with respect to any specified Person, the obligations of such Person under:

(1) interest rate swap agreements (whether from fixed to floating or from floating to fixed), interest rate cap agreements and interest rate collar agreements entered into with one or more financial institutions and other arrangements or agreements designed to protect the Person entering into the agreement against fluctuations in interest rates with respect to Indebtedness incurred;

(2) foreign exchange contracts and currency protection agreements entered into with one or more financial institutions and designed to protect the Person entering into the agreement against fluctuations in currency exchange rates with respect to Indebtedness incurred;

(3) any commodity futures contract, commodity option or other similar agreement or arrangement designed to protect against fluctuations in the price of commodities used, produced, processed or sold by that Person or any of its Restricted Subsidiaries at the time; and

(4) other agreements or arrangements designed to protect such Person against fluctuations in interest rates, commodity prices or currency exchange rates.

“Hydrocarbons” means crude oil, natural gas, casinghead gas, drip gasoline, natural gasoline, condensate, distillate, liquid hydrocarbons, gaseous hydrocarbons and all constituents, elements or compounds thereof and products refined or processed therefrom.

“Indebtedness” means, with respect to any specified Person, any indebtedness of such Person (excluding accrued expenses and trade payables), whether or not contingent:

(1) in respect of borrowed money;

(2) evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement agreements in respect thereof);

(3) in respect of banker’s acceptances;

(4) representing Capital Lease Obligations or Attributable Debt in respect of sale and leaseback transactions;

(5) representing the balance deferred and unpaid of the purchase price of any property due more than nine months after such property is acquired; and

(6) representing any Hedging Obligations,

if, and to the extent that, any of the items described in clauses (1), (2), (4) and (5) above would appear as a liability upon a balance sheet of such Person prepared in accordance with GAAP.

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In addition, the term “Indebtedness” includes (1) all Indebtedness described in the preceding paragraph of another Person secured by a Lien on any asset of the specified Person, whether or not such Indebtedness is assumed by the specified Person; provided, however, that the amount of such Indebtedness will be the lesser of (a) the Fair Market Value of such asset at such date of determination and (b) the amount of such Indebtedness of such other Person, and (2) to the extent not otherwise included, the Guarantee by the specified Person of any Indebtedness described in the preceding paragraph of any other Person (including, with respect to any Production Payment, any warranties or guarantees of production or payment by such Person with respect to such Production Payment, but excluding other contractual obligations of such Person with respect to such Production Payment). Notwithstanding any other provision of this definition, neither Dollar-Denominated Production Payments nor Volumetric Production Payments shall be deemed to be Indebtedness.

In addition, “Indebtedness” of any Person shall include Indebtedness described in the preceding paragraph that would not appear as a liability on the balance sheet of such Person if:

(1) such Indebtedness is the obligation of a Joint Venture that is not a Restricted Subsidiary;

(2) such Person or a Restricted Subsidiary of such Person is a general partner of the Joint Venture (a “General Partner”); and

(3) there is recourse, by contract or operation of law, with respect to the payment of such Indebtedness to property or assets by such Person or a Restricted Subsidiary of such Person;

and then such Indebtedness shall be included in an amount not to exceed:

(a) the lesser of (i) the net assets of the General Partner and (ii) the amount of such obligations to the extent that there is recourse, by contract or operation of law, to the property or assets of such Person or a Restricted Subsidiary of such Person; or

(b) if less than the amount determined pursuant to clause (a) immediately above, the actual amount of such Indebtedness that is recourse to such Person or a Restricted Subsidiary of such Person, if the Indebtedness is evidenced by a writing and is for a determinable amount and the related interest expense shall be included in Fixed Charges to the extent actually paid by such Person or its Restricted Subsidiaries.

“Investment Grade Rating” means a rating of Baa3 (or the equivalent) or better by Moody’s, BBB- (or the equivalent) or better by S&P or an equivalent rating by a Substitute Rating Agency.

“Investment Grade Securities” means:

(1) securities issued or directly and fully guaranteed or insured by the U.S. government or any agency or instrumentality thereof (other than Cash Equivalents) and in each case with maturities not exceeding two years from the date of acquisition;

(2) investments in any fund that invests exclusively in investments of the type described in clause (1) which fund may also hold immaterial amounts of cash pending investment and/or distribution; and

(3) corresponding instruments in countries other than the United States customarily utilized for high quality investments and in each case with maturities not exceeding two years from the date of acquisition.

“Investments” means, with respect to any Person, all direct or indirect investments by such Person in other Persons (including Affiliates) in the forms of loans (including Guarantees or other obligations) advances or capital contributions (excluding endorsements of negotiable instruments and documents in the ordinary course of business, and commission, travel and similar advances to officers, employees and consultants made in the ordinary course of business), purchases or other acquisitions for consideration of Indebtedness, Equity Interests or other securities, together with all items that are or would be classified as investments on a balance sheet prepared in accordance with GAAP. If W&T or any Restricted Subsidiary of W&T sells or otherwise disposes of any Equity Interests of any direct or indirect Restricted Subsidiary of W&T such that, after giving effect to any such sale or disposition, such Person is no longer a Restricted Subsidiary of W&T, W&T will be deemed to have

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made an Investment on the date of any such sale or disposition equal to the Fair Market Value of W&T’s Investments in such Restricted Subsidiary that were not sold or disposed of in an amount determined as provided in the final paragraph of the covenant described above under the caption “—Certain Covenants—Restricted Payments.” The acquisition by W&T or any Subsidiary of W&T of a Person that holds an Investment in a third Person will be deemed to be an Investment by W&T or such Subsidiary in such third Person in an amount equal to the Fair Market Value of the Investments held by the acquired Person in such third Person in an amount determined as provided in the final paragraph of the covenant described above under the caption “—Certain Covenants—Restricted Payments.” Except as otherwise provided in the indenture, the amount of an Investment will be determined at the time the Investment is made and without giving effect to subsequent changes in value.

“Issue Date” means the date of the indenture.

“Joint Venture” means any Person that is not a direct or indirect Subsidiary of W&T in which W&T or any of its Restricted Subsidiaries directly or indirectly makes any Investment.

“Lien” means, with respect to any asset, any mortgage, lien, pledge, charge, security interest or encumbrance of any kind in respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law, including any conditional sale or other title retention agreement, any lease in the nature thereof, any option or other agreement to sell or give a security interest in and any filing of any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction.

“Minimum Amount” means $5.0 million.

“Minority Interest” means the percentage interest represented by any Capital Stock of a Restricted Subsidiary of W&T that is not owned by W&T or a Restricted Subsidiary of W&T.

“Moody’s” means Moody’s Investors Service, Inc. or any successor to the rating agency business thereof.

“Net Income” means, with respect to any specified Person, the net income (loss) of such Person, determined in accordance with GAAP and before any reduction in respect of preferred stock dividends, excluding, however:

(1) any gain or loss, together with any related provision for taxes on such gain (but not loss), realized in connection with: (a) any Asset Sale; or (b) the disposition of any securities by such Person or any of its Restricted Subsidiaries or the extinguishment of any Indebtedness of such Person or any of its Restricted Subsidiaries; and

(2) any extraordinary or nonrecurring gain or loss, together with any related provision for taxes on such extraordinary or nonrecurring gain or loss.

“Net Proceeds” means the aggregate cash proceeds received by W&T or any of its Restricted Subsidiaries in respect of any Asset Sale (including, without limitation, any cash received upon the sale or other disposition of any non-cash consideration received in any Asset Sale), net of:

(1) all legal, accounting, investment banking, title and recording tax expenses, commissions and other fees and expenses incurred, and all Federal, state, provincial, foreign and local taxes required to be paid or accrued as a liability under GAAP (after taking into account any available tax credits or deductions and any tax sharing agreements), as a consequence of such Asset Sale;

(2) all payments made on any Indebtedness (other than revolving credit Indebtedness) which is secured by any assets subject to such Asset Sale, in accordance with the terms of any Lien upon such assets, or which must by its terms, or in order to obtain a necessary consent to such Asset Sale, or by applicable law be repaid out of the proceeds from such Asset Sale;

(3) all distributions and other payments required to be made to holders of Minority Interests in Subsidiaries or joint ventures as a result of such Asset Sale; and

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(4) the deduction of appropriate amounts to be provided by the seller as a reserve, in accordance with GAAP, or held in escrow, in either case for adjustment in respect of the sale price or for any liabilities associated with the assets disposed of in such Asset Sale and retained by W&T or any Restricted Subsidiary after such Asset Sale.

“Net Working Capital” means (a) all current assets of W&T and its Restricted Subsidiaries except current assets from commodity price risk management activities arising in the ordinary course of business, less (b) all current liabilities of W&T and its Restricted Subsidiaries, except current liabilities included in Indebtedness and any current liabilities from commodity price risk management activities arising in the ordinary course of business, in each case as set forth in the consolidated financial statements of W&T prepared in accordance with GAAP (excluding any adjustments made pursuant to FASB ASC Topic 815).

“Non-Recourse Debt” means Indebtedness:

(1) as to which neither W&T nor any of its Restricted Subsidiaries (a) provides credit support of any kind (including any undertaking, agreement or instrument that would constitute Indebtedness), (b) is directly or indirectly liable as a guarantor or otherwise, or (c) constitutes the lender; and

(2) no default with respect to which (including any rights that the holders of the Indebtedness may have to take enforcement action against an Unrestricted Subsidiary) would permit upon notice, lapse of time or both any holder of any other Indebtedness of W&T or any of its Restricted Subsidiaries to declare a default on such other Indebtedness or cause the payment of the Indebtedness to be accelerated or payable prior to its Stated Maturity.

“Note Guarantee” means the Guarantee by each Guarantor of W&T’s Obligations under the indenture and the notes.

“Obligations” means any principal, interest, penalties, fees, indemnifications, reimbursements, damages and other liabilities payable under the documentation governing any Indebtedness.

“Oil and Gas Business” means:

(1) the acquisition, exploration, exploitation, development, production, operation and disposition of interests in crude oil, natural gas and other Hydrocarbon properties;

(2) the gathering, marketing, treating, processing (but not refining), storage, distribution, selling and transporting of any production from such interests or properties;

(3) any business relating to exploration for or development, production, exploitation, treatment, processing (but not refining), storage, transportation or marketing of oil, gas and other minerals and products produced in association therewith; and

(4) any activity that is ancillary or complementary to or necessary or appropriate for the activities described in clauses (1) through (3) of this definition.

“Permitted Acquisition Indebtedness” means Indebtedness or Disqualified Stock of W&T or any of W&T’s Restricted Subsidiaries to the extent such Indebtedness or Disqualified Stock was Indebtedness or Disqualified Stock of:

(1) a Subsidiary prior to the date on which such Subsidiary became a Restricted Subsidiary; or

(2) a Person that was merged, consolidated or amalgamated into W&T or a Restricted Subsidiary, provided that on the date such Subsidiary became a Restricted Subsidiary or the date such Person was merged, consolidated and amalgamated into W&T or a Restricted Subsidiary, as applicable, after giving pro forma effect thereto,

(a) the Restricted Subsidiary or W&T, as applicable, would be permitted to incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test described under “—Certain Covenants—Incurrence of Indebtedness and Issuance of Preferred Stock,”

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(b) the Fixed Charge Coverage Ratio for the Restricted Subsidiary or W&T, as applicable, would be greater than the Fixed Charge Coverage Ratio for such Restricted Subsidiary or W&T immediately prior to such transaction, or

(c) the Consolidated Net Worth of the Restricted Subsidiary or W&T, as applicable, would be greater than the Consolidated Net Worth of such Restricted Subsidiary or W&T immediately prior to such transaction.

“Permitted Business Investments” means Investments made in the ordinary course of, and of a nature that is or shall have become customary in, the Oil and Gas Business, including through agreements, transactions, interests or arrangements that permit one to share risk or costs, comply with regulatory requirements regarding local ownership or satisfy other objectives customarily achieved through the conduct of the Oil and Gas Business jointly with third parties, including without limitation:

(1) direct or indirect ownership of crude oil, natural gas, other related Hydrocarbon and mineral properties or any interest therein or gathering, transportation, processing, storage or related systems or ancillary real property interests; and

(2) Investments in the form of, pursuant to or in accordance with operating agreements, working interests, royalty interests, mineral leases, processing agreements, farm-in agreements, farm-out agreements, contracts for the sale, transportation or exchange of oil, natural gas, other Hydrocarbons and minerals, production sharing agreements, participation agreements, development agreements, area of mutual interest agreements, unitization agreements, pooling agreements, joint bidding agreements, service contracts, joint venture agreements, partnership agreements (whether general or limited), subscription agreements, stock purchase agreements, stockholder agreements and other similar or customary agreements (including for limited liability companies) with third parties (including Unrestricted Subsidiaries), transactions, properties, interests or arrangements and Investments and expenditures in connection therewith or pursuant thereto.

“Permitted Investments” means:

(1) any Investment in W&T or in a Restricted Subsidiary of W&T;

(2) any Investment in Cash Equivalents or Investment Grade Securities;

(3) any Investment by W&T or any Restricted Subsidiary of W&T in a Person, if as a result of such Investment:

(a) such Person becomes a Restricted Subsidiary of W&T; or

(b) such Person is merged, consolidated or amalgamated with or into, or transfers or conveys substantially all of its assets to, or is liquidated into, W&T or a Restricted Subsidiary of W&T;

(4) any Investment made as a result of the receipt of non-cash consideration from an Asset Sale that was made pursuant to and in compliance with the covenant described above under the caption “—Repurchase at the Option of Holders—Asset Sales”;

(5) any acquisition of assets or Capital Stock solely in exchange for the issuance of Equity Interests (other than Disqualified Stock) of W&T;

(6) any Investments received in compromise or resolution of (A) obligations of trade creditors or customers that were incurred in the ordinary course of business of W&T or any of its Restricted Subsidiaries, including pursuant to any plan of reorganization or similar arrangement upon the bankruptcy or insolvency of any trade creditor or customer; or (B) litigation, arbitration or other disputes with Persons who are not Affiliates;

(7) Investments represented by Hedging Obligations;

(8) loans or advances to employees in the ordinary course of business made for bona fide business purposes not to exceed $5.0 million in the aggregate at any time outstanding;

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(9) receivables owing to W&T or any Restricted Subsidiary created or acquired in the ordinary course of business and payable or dischargeable in accordance with customary trade terms; provided, however, that such trade terms may include such concessionary trade terms as W&T or any such Restricted Subsidiary deems reasonable under the circumstances;

(10) surety and performance bonds and workers’ compensation, utility, lease, tax, performance and similar deposits and prepaid expenses in the ordinary course of business;

(11) Guarantees of Indebtedness permitted under the covenant described under “—Certain Covenants—Incurrence of Indebtedness and Issuance of Preferred Stock”;

(12) Guarantees by W&T or any of its Restricted Subsidiaries of operating leases (other than Capital Lease Obligations) or of other obligations that do not constitute Indebtedness, in each case entered into by any Restricted Subsidiary in the ordinary course of business;

(13) Investments of a Restricted Subsidiary acquired after the Issue Date or of any entity merged into W&T or merged into or consolidated or amalgamated with a Restricted Subsidiary in accordance with the covenant described under “—Certain Covenants—Merger, Consolidation or Sale of Assets” to the extent that such Investments were not made in contemplation of or in connection with such acquisition, merger or consolidation and were in existence on the date of such acquisition, merger or consolidation;

(14) Permitted Business Investments;

(15) Investments received as a result of a foreclosure by W&T or any of its Restricted Subsidiaries with respect to any secured Investment in default;

(16) Investments in any units of any oil and gas royalty trust; and

(17) other Investments in any Person having an aggregate Fair Market Value (measured on the date each such Investment was made and without giving effect to subsequent changes in value), when taken together with all other Investments made pursuant to this clause (17) that are at the time outstanding not to exceed the greater of (a) 1.0% of Adjusted Consolidated Net Tangible Assets or (b) $25.0 million.

“Permitted Liens” means:

(1) Liens securing Indebtedness incurred under the Credit Facilities pursuant to the covenant described under the caption “—Certain Covenants—Incurrence of Indebtedness”;

(2) Liens in favor of W&T or the Guarantors;

(3) Liens on property of a Person existing at the time such Person is merged with or into or consolidated with W&T or any Subsidiary of W&T; provided that such Liens were in existence prior to the contemplation of such merger or consolidation and do not extend to any assets other than those of the Person merged into or consolidated with W&T or the Subsidiary;

(4) Liens on property (including Capital Stock) existing at the time of acquisition of the property by W&T or any Subsidiary of W&T; provided that such Liens were in existence prior to, such acquisition, and not incurred in contemplation of, such acquisition;

(5) Liens existing on the Issue Date;

(6) Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being contested in good faith by appropriate proceedings promptly instituted and diligently concluded; provided that any reserve or other appropriate provision as is required in conformity with GAAP has been made therefor;

(7) Liens arising from survey exceptions, easements or reservations of, or rights of others for, licenses, rights-of-way, sewers, electric lines, telegraph and telephone lines and other similar purposes, or zoning or other restrictions as to the use of real property that were not incurred in connection with Indebtedness and that do not in the aggregate materially adversely affect the value of said properties or materially impair their use in the operation of the business of such Person;

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(8) Liens arising from leases or subleases granted to others that do not materially interfere with the ordinary course of business of W&T and its Restricted Subsidiaries, taken as a whole;

(9) landlords’, carriers’, warehousemen’s, mechanics’, materialmen’s, repairmen’s or the like Liens arising by contract or statute in the ordinary course of business and with respect to amounts which are not yet delinquent or are being contested in good faith by appropriate proceedings;

(10) Liens arising from pledges or deposits made in the ordinary course of business (A) in connection with leases, tenders, bids, statutory obligations, surety or appeal bonds, government contracts, performance bonds and similar obligations, or (B) in connection with workers’ compensation, unemployment insurance and other social security legislation;

(11) Liens encumbering property or assets under construction arising from progress or partial payments by a customer of W&T or its Restricted Subsidiaries relating to such property or assets;

(12) Liens in favor of customs and revenue authorities arising as a matter of law to secure payments of customs duties in connection with the importation of goods;

(13) any attachment or judgment Lien that does not constitute an Event of Default;

(14) Liens created for the benefit of (or to secure) the notes (or the Note Guarantees);

(15) Liens to secure any Permitted Refinancing Indebtedness permitted to be incurred under the indenture; provided, however, that

(a) the new Lien shall be limited to all or part of the same property and assets that secured or, under the written agreements pursuant to which the original Lien arose, could secure the original Lien (plus improvements and accessions to, such property or proceeds or distributions thereof); and

(b) the Indebtedness secured by the new Lien is not increased to any amount greater than the sum of (x) the outstanding principal amount, or, if greater, committed amount, of the Permitted Refinancing Indebtedness and (y) an amount necessary to pay any fees and expenses, including premiums, related to such renewal, refunding, refinancing, replacement, defeasance or discharge;

(16) Liens for the purpose of securing the payment of all or a part of the purchase price of, or Capital Lease Obligations with respect to, or the repair, improvement or construction cost of, assets or property acquired or repaired, improved or constructed in the ordinary course of business; provided that:

(a) the aggregate principal amount of Indebtedness secured by such Liens is otherwise permitted to be incurred under the indenture and does not exceed the cost of the assets or property so acquired or repaired, improved or constructed plus fees and expenses in connection therewith; and

(b) such Liens are created within 180 days of repair, improvement, construction or acquisition of such assets or property and do not encumber any other assets or property of W&T or any of its Restricted Subsidiaries other than such assets or property and assets affixed or appurtenant thereto (including improvements);

(17) Liens arising solely by virtue of any statutory or common law provisions relating to banker’s Liens, rights of set-off or similar rights and remedies as to deposit accounts or other funds maintained or deposited with a depositary institution; provided that:

(a) such deposit account is not a dedicated cash collateral account and is not subject to restrictions against access by W&T in excess of those set forth by regulations promulgated by the Federal Reserve Board; and

(b) such deposit account is not intended by W&T or any Restricted Subsidiary to provide collateral to the depositary institution;

(18) Liens arising from Uniform Commercial Code financing statement filings regarding operating leases entered into by W&T and its Restricted Subsidiaries in the ordinary course of business;

(19) Liens in respect of Production Payments and Reserve Sales;

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(20) Liens on pipelines and pipeline facilities that arise by operation of law;

(21) Liens arising from farmout, carried working interest, joint operating, unitization, royalty, sales and similar agreements relating to the exploration or development of, or production from, oil and gas properties entered into in the ordinary course of business;

(22) Liens reserved in oil and gas mineral leases for bonus or rental payments and for compliance with the terms of such leases;

(23) Liens arising under the indenture in favor of the trustee for its own benefit and similar Liens in favor of other trustees, agents and representatives arising under instruments governing Indebtedness permitted to be incurred under the indenture, provided, however, that such Liens are solely for the benefit of the trustees, agents or representatives in their capacities as such and not for the benefit of the holders of the Indebtedness;

(24) Liens securing Hedging Obligations of W&T and its Restricted Subsidiaries;

(25) Liens on and pledges of the Equity Interests of any Unrestricted Subsidiary or any Joint Venture owned by W&T or any of its Restricted Subsidiary to the extent securing Non-Recourse Debt of such Unrestricted Subsidiary or Joint Venture;

(26) Liens upon specific items of inventory, receivables or other goods or proceeds of W&T or any of its Restricted Subsidiaries securing such Person’s obligations in respect of bankers’ acceptances or receivables securitizations issued or created for the account of such Person to facilitate the purchase, shipment or storage of such inventory, receivables or other goods or proceeds and permitted by the covenant described under the caption “—Certain Covenants—Incurrence of Indebtedness”; and

(27) Liens of W&T or any Subsidiary of W&T with respect to Indebtedness that does not exceed in principal amount the greater of (a) $40.0 million at any one time outstanding and (b) 2.0% of the Adjusted Consolidated Net Tangible Assets determined as of the date of the incurrence of such Indebtedness after giving pro forma effect to such incurrence and the application of proceeds therefrom.

“Permitted Refinancing Indebtedness” means any Indebtedness of W&T or any of its Restricted Subsidiaries issued in exchange for, or the net proceeds of which are used to renew, refund, refinance, replace, defease or discharge other Indebtedness of W&T or any of its Restricted Subsidiaries (other than intercompany Indebtedness); provided that:

(1) the principal amount (or accreted value, if applicable) of such Permitted Refinancing Indebtedness does not exceed the principal amount (or accreted value, if applicable) of the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged (plus all accrued interest on the Indebtedness and the amount of all fees and expenses, including premiums, incurred in connection therewith);

(2)(a) if the final maturity date of the Indebtedness being extended, renewed, refunded, refinanced, replaced, defeased or discharged is earlier than the final maturity date of the notes, the Permitted Refinancing Indebtedness has a final maturity date no earlier than the final maturity date of the indebtedness being extended, renewed, refunded, discharged, refinanced, replaced or defeased, or

(b) if the final maturity date of the Indebtedness being extended, renewed, refunded, refinanced, replaced, defeased or discharged is later than the final maturity date of the notes, the Permitted Refinancing Indebtedness has a final maturity date at least 91 days later than the final maturity date of the notes;

(3) if the Indebtedness being extended, renewed, refunded, refinanced, replaced, defeased or discharged is subordinated in right of payment to the notes, such Permitted Refinancing Indebtedness is subordinated in right of payment to the notes on terms at least as favorable to the holders of notes as those contained in the documentation governing the Indebtedness being extended, renewed, refunded, refinanced, replaced, defeased or discharged; and

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(4) such Indebtedness is incurred either by W&T or by the Restricted Subsidiary who is the obligor on the Indebtedness being extended, renewed, refunded, refinanced, replaced, defeased or discharged; provided, however, that a Restricted Subsidiary that is also a Guarantor may guarantee Permitted Refinancing Indebtedness incurred by W&T, whether or not such Restricted Subsidiary was an obligor or guarantor of the Indebtedness being renewed, refunded, refinanced, replaced, defeased or discharged.

“Person” means any individual, corporation, partnership, joint venture, association, joint-stock company, trust, unincorporated organization, limited liability company or government or other entity.

“Principals” means Tracy W. Krohn, his spouse, Susan B. Krohn, their immediate family and descendants by blood or adoption, Ann K. Freel, mother of Tracy W. Krohn, and J.F. Freel, step-father of Tracy W. Krohn, and spouses or surviving spouses of any such persons.

“Prior Issue Date” means June 13, 2007, the date of original issue of W&T’s 8.25% Senior Notes dues 2014.

“Production Payments” means, collectively, Dollar-Denominated Production Payments and Volumetric Production Payments.

“Production Payments and Reserve Sales” means the grant or transfer by W&T or a Restricted Subsidiary of W&T to any Person of a royalty, overriding royalty, net profits interest, Production Payment or other interest in oil and gas properties, reserves or the right to receive all or a portion of the production or the proceeds from the sale of production attributable to such properties, including any such grants or transfers pursuant to incentive compensation programs on terms that are reasonably customary in the oil and gas business for geologists, geophysicists and other providers of technical services to W&T or a Subsidiary of W&T.

“Rating Agencies” means Moody’s and S&P; provided that if Moody’s or S&P shall cease to rate the notes for reasons outside the control of W&T, another security rating agency selected by W&T that is nationally recognized in the United States may be substituted therefore (a “Substitute Rating Agency”).

“Related Party” means any trust, corporation, partnership, limited liability company or other entity, of which one or more of the Principals or other Related Parties collectively Beneficially Own 80% or more of such entity.

“Restricted Investment” means an Investment other than a Permitted Investment.

“Restricted Subsidiary” of a Person means any Subsidiary of such Person that is not an Unrestricted Subsidiary.

“S&P” means Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc.

“Senior Debt” means:

(1) all Indebtedness of W&T or any of its Restricted Subsidiaries outstanding under Credit Facilities and all Hedging Obligations with respect thereto;

(2) any other Indebtedness of W&T or any of its Restricted Subsidiaries permitted to be incurred under the terms of the indenture, except Subordinated Obligations; and

(3) all Obligations with respect to the items listed in the preceding clauses (1) and (2). Notwithstanding anything to the contrary in the preceding sentence, Senior Debt will not include:

(a) any taxes owed or owing by W&T or any Restricted Subsidiary.

(b) trade payables;

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(c) any intercompany Indebtedness of W&T or any of its Subsidiaries to W&T or any of its Affiliates; or

(d) any Indebtedness that is incurred in violation of the indenture.

“Significant Subsidiary” means any Subsidiary that would be a “significant subsidiary” as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated pursuant to the Securities Act, as such Regulation is in effect on the date of the indenture.

“Stated Maturity” means, with respect to any installment of interest or principal on any series of Indebtedness, the date on which the payment of interest or principal was scheduled to be paid in the original documentation governing such Indebtedness, and will not include any contingent obligations to repay, redeem or repurchase any such interest or principal prior to the date originally scheduled for the payment thereof.

“Subordinated Obligation” means any Indebtedness of W&T (whether outstanding on the Issue Date or thereafter incurred) which is subordinate or junior in right of payment to the notes pursuant to a written agreement or any Indebtedness of a Guarantor (whether outstanding on the Issue Date or thereafter incurred) which is subordinate or junior in right of payment to the Note Guarantee pursuant to a written agreement, as the case may be.

“Subsidiary” means, with respect to any specified Person:

(1) any corporation, association or other business entity of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency and after giving effect to any voting agreement or stockholders’ agreement that effectively transfers voting power) to vote in the election of directors, managers or trustees of the corporation, association or other business entity is at the time owned or controlled, directly or indirectly, by that Person or one or more of the other Subsidiaries of that Person (or a combination thereof); and

(2) any partnership (a) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person or (b) the only general partners of which are that Person or one or more Subsidiaries of that Person (or any combination thereof).

“Treasury Rate” means, with respect to the notes as of any redemption date, the yield to maturity at the time of computation of United States Treasury securities with a constant maturity (as compiled and published in the most recent Federal Reserve Statistical Release H.15 (519) that has become publicly available at least two Business Days prior to the redemption date (or, if such Statistical Release is no longer published, any publicly available source or similar market data) most nearly equal to the period from the redemption date to June 15, 2015; provided, however, that if the period from the redemption date to June 15, 2015 is not equal to the constant maturity of a United States Treasury security for which a weekly average yield is given, the Treasury Rate shall be obtained by linear interpolation (calculated to the nearest one-twelfth of a year) from the weekly average yields of United States Treasury securities for which such yields are given, except that if the period from the redemption date to the final maturity of the notes is less than one year, the weekly average yield on actually traded United States Treasury securities adjusted to a constant maturity of one year shall be used. W&T will (a) calculate the Treasury Rate on the second Business Day preceding the applicable redemption date and (b) on or prior to such redemption date file with the trustee an officers’ certificate setting forth the Applicable Premium and the Treasury Rate and showing the calculation of each in reasonable detail.

“Unrestricted Subsidiary” means any Subsidiary of W&T that is designated by the Board of Directors of W&T as an Unrestricted Subsidiary pursuant to a resolution of the Board of Directors, but only to the extent that such Subsidiary:

(1) has no Indebtedness other than Non-Recourse Debt;

(2) except as permitted by the covenant described above under the caption “—Certain Covenants—Transactions with Affiliates,” is not party to any agreement, contract, arrangement or understanding with

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W&T or any Restricted Subsidiary of W&T unless the terms of any such agreement, contract, arrangement or understanding are no less favorable to W&T or such Restricted Subsidiary than those that might be obtained at the time from Persons who are not Affiliates of W&T;

(3) is a Person with respect to which neither W&T nor any of its Restricted Subsidiaries has any direct or indirect obligation (a) to subscribe for additional Equity Interests or (b) to maintain or preserve such Person’s financial condition or to cause such Person to achieve any specified levels of operating results; and

(4) has not guaranteed or otherwise directly or indirectly provided credit support for any Indebtedness of W&T or any of its Restricted Subsidiaries.

“Volumetric Production Payments” means production payment obligations recorded as deferred revenue in accordance with GAAP, together with all related undertakings and obligations.

“Voting Stock” of any specified Person as of any date means the Capital Stock of such Person that is at the time entitled to vote (without regard to the occurrence of any contingency) in the election of the Board of Directors of such Person.

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PLAN OF DISTRIBUTION

You may transfer new notes issued under the exchange offer in exchange for the old notes if:

Each broker-dealer that receives new notes for its own account pursuant to the exchange offer in exchange for old notes that were acquired by such broker-dealer as a result of market-making or other trading activities must acknowledge that it will deliver a prospectus in connection with any resale of such new notes. This prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of new notes received in exchange for old notes where such old notes were acquired as a result of market-making activities or other trading activities.

If you wish to exchange new notes for your old notes in the exchange offer, you will be required to make representations to us as described in “Exchange Offer—Purpose and Effect of the Exchange Offer” and “—Procedures for Tendering—Your Representations to Us” in this prospectus and in the letter of transmittal. In addition, if you are a broker-dealer who receives new notes for your own account in exchange for old notes that were acquired by you as a result of market-making activities or other trading activities, you will be required to acknowledge that you will deliver a prospectus in connection with any resale by you of such new notes.

We will not receive any proceeds from any sale of new notes by broker-dealers. New notes received by broker-dealers for their own account pursuant to the exchange offer may be sold from time to time on one or more transactions in any of the following ways:

Any such resale may be made directly to purchasers or to or through brokers or dealers who may receive compensation in the form of commissions or concessions from any such broker-dealer or the purchasers of any such new notes.

Any broker-dealer that resells new notes that were received by it for its own account pursuant to the exchange offer in exchange for old notes that were acquired by such broker-dealer as a result of market-making or other trading activities may be deemed to be an “underwriter” within the meaning of the Securities Act. The letter of transmittal states that by acknowledging that it will deliver and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an “underwriter” within the meaning of the Securities Act. We agreed to permit the use of this prospectus for a period of up to 180 days after the completion of the exchange offer by such broker-dealers to satisfy this prospectus delivery requirement. Furthermore, we agreed to amend or supplement this prospectus during such period if so requested in order to expedite or facilitate the disposition of any new notes by broker-dealers.

We have agreed to pay all expenses incident to the exchange offer other than fees and expenses of counsel to the holders and brokerage commissions and transfer taxes, if any, and will indemnify the holders of the old notes (including any broker-dealers) against certain liabilities, including liabilities under the Securities Act.

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MATERIAL UNITED STATES FEDERAL INCOME TAX CONSEQUENCES

The following discussion is a summary of the material federal income tax considerations relevant to the exchange of old notes for new notes, but does not purport to be a complete analysis of all potential tax effects. The discussion is based upon the Internal Revenue Code of 1986, as amended (the “Code”), Treasury Regulations, Internal Revenue Service rulings and pronouncements and judicial decisions now in effect, all of which may be subject to change at any time by legislative, judicial or administrative action. These changes may be applied retroactively in a manner that could adversely affect a holder of new notes. Some holders, including financial institutions, insurance companies, regulated investment companies, tax-exempt organizations, dealers in securities or currencies, persons whose functional currency is not the U.S. dollar, or persons who hold the notes as part of a hedge, conversion transaction, straddle or other risk reduction transaction may be subject to special rules not discussed below. We recommend that each holder consult his own tax advisor as to the particular tax consequences of exchanging such holder’s old notes for new notes, including the applicability and effect of any foreign, state, local or other tax laws or estate or gift tax considerations.

We believe that the exchange of old notes for new notes will not be an exchange or otherwise a taxable event to a holder for United States federal income tax purposes. Accordingly, a holder will not recognize gain or loss upon receipt of a new note in exchange for an old note in the exchange, and the holder’s basis and holding period in the new note will be the same as its basis and holding period in the corresponding old note immediately before the exchange.

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LEGAL MATTERS

The validity of the new notes offered in this exchange offer will be passed upon for us by Vinson & Elkins L.L.P., Houston, Texas.

EXPERTS

The consolidated financial statements of W&T Offshore, Inc. and subsidiaries appearing in W&T Offshore, Inc.’s Annual Report (Form 10-K) for the year ended December 31, 2010, and the effectiveness of W&T Offshore, Inc.’s internal control over financial reporting as of December 31, 2010, have been audited by Ernst & Young LLP, independent registered public accounting firm, as set forth in their reports thereon included therein, and incorporated herein by reference. Such financial statements are, and audited financial statements to be included in subsequently filed documents will be, incorporated herein in reliance upon the reports of Ernst & Young LLP pertaining to such financial statements and the effectiveness of our internal control over financial reporting as of the respective dates (to the extent covered by consents filed with the Securities and Exchange Commission) given on the authority of such firm as experts in accounting and auditing.

The audited statements of revenue and direct operating expenses of Opal Resources LLC and Opal Resources Operating Company LLP (“the Permian Basin Properties”) included as exhibit 99.1 of W&T Offshore, Inc.’s Current Report on Form 8-K on July 21, 2011 have been so incorporated in reliance on the report of PricewaterhouseCoopers, LLC, independent accountants, given on the authority of such firm as experts in auditing and accounting.

Certain estimates of proved oil and gas reserves for W&T Offshore, Inc. incorporated by reference herein were based in part upon an engineering report prepared by Netherland, Sewell & Associates, Inc., independent petroleum engineers. These estimates are included and incorporated herein in reliance on the authority of such firm as an expert in such matters.

WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION BY REFERENCE

We file annual, quarterly and special reports with the SEC. Our SEC filings are available over the Internet at the SEC’s web site at http://www.sec.gov. You may also read and copy any document we file at the SEC’s public reference room in Washington, D.C. Please call the SEC at 1-800-SEC-0330 for more information on the public reference room and its copy charges.

We “incorporate by reference” information into this prospectus, which means that we disclose important information to you be referring you to another document filed separately with the SEC. The information incorporated by reference is deemed to be part of this prospectus, except for any information superseded by information contained expressly in this prospectus. You should not assume that the information in this prospectus is current as of any date other than the date on the cover page of this prospectus.

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Any information that we file under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act from the date of this document until the notes offering pursuant to this registration statement is terminated, and that is deemed “filed” with the SEC, will automatically update and supersede this information. We also incorporate by reference the documents listed below:

You can obtain copies of any of these documents without charge upon written or oral request by requesting them in writing or by telephone at:

W&T Offshore, Inc.

Nine Greenway Plaza, Suite 300

Houston, Texas 77046

Telephone number: (713) 626-8525

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ANNEX A:

LETTER OF TRANSMITTAL

TO TENDER

OLD 8.500% SENIOR NOTES DUE 2019

OF

W&T OFFSHORE, INC.

PURSUANT TO THE EXCHANGE OFFER AND PROSPECTUS

DATED                     , 2011

THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK

CITY TIME, ON                     , 2011 (THE “EXPIRATION DATE”), UNLESS THE EXCHANGE OFFER

IS EXTENDED BY THE ISSUER.

The Exchange Agent for the Exchange Offer is:

By Facsimile (for Eligible Institutions only):

(612) 667-6282

For Information or Confirmation by

Telephone:

(800) 344-5128

If you wish to exchange your issued and outstanding 8.500% Senior Notes due 2019 (“old notes”) for an equal aggregate principal amount of newly issued 8.500% Senior Notes due 2019 (“new notes”) with materially identical terms that have been registered under the Securities Act of 1933, as amended (the “Securities Act”) pursuant to the exchange offer, you must validly tender (and not withdraw) your old notes to the Exchange Agent prior to the Expiration Date.

We refer you to the Prospectus, dated                     , 2011 (the “Prospectus”), of W&T Offshore, Inc. (the “Issuer”), and this Letter of Transmittal (the “Letter of Transmittal”), which together describe the Issuer’s offer (the “Exchange Offer”) to exchange the old notes for a like aggregate principal amount of new notes. Capitalized terms used but not defined herein have the respective meaning given to them in the Prospectus.

The Issuer reserves the right, at any time or from time to time, to extend the Exchange Offer at its discretion, in which event the term “Expiration Date” shall mean the latest date and time to which the Exchange Offer is extended. The Issuer shall notify the Exchange Agent and each registered holder of the old notes of any extension by oral or written notice prior to 9:00 a.m., New York City time, on the next business day after the previously scheduled Expiration Date.

This Letter of Transmittal is to be used by holders of the old notes. Tender of old notes is to be made according to the Automated Tender Offer Program (“ATOP”) of The Depository Trust Company (“DTC”) pursuant to the procedures set forth in the Prospectus under the caption “Exchange Offer—Procedures for Tendering.” DTC participants that are accepting the Exchange Offer must transmit their acceptance to DTC, which will verify the acceptance and execute a book-entry delivery to the Exchange Agent’s DTC account. DTC

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will then send a computer generated message known as an “agent’s message” to the Exchange Agent for its acceptance. For you to validly tender your old notes in the Exchange Offer, the Exchange Agent must receive, prior to the Expiration Date, an agent’s message under the ATOP procedures that confirms that:

BY USING THE ATOP PROCEDURES TO TENDER OLD NOTES, YOU WILL NOT BE REQUIRED TO DELIVER THIS LETTER OF TRANSMITTAL TO THE EXCHANGE AGENT. HOWEVER, YOU WILL BE BOUND BY ITS TERMS, AND YOU WILL BE DEEMED TO HAVE MADE THE ACKNOWLEDGMENTS AND THE REPRESENTATIONS AND WARRANTIES IT CONTAINS, JUST AS IF YOU HAD SIGNED IT.

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PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.

Ladies and Gentlemen:

1. By tendering old notes in the Exchange Offer, you acknowledge receipt of the Prospectus and this Letter of Transmittal.

2. By tendering old notes in the Exchange Offer, you represent and warrant that you have full authority to tender the old notes described above and will, upon request, execute and deliver any additional documents deemed by the Issuer to be necessary or desirable to complete the tender of old notes.

3. You understand that the tender of the old notes pursuant to all of the procedures set forth in the Prospectus will constitute an agreement between you and the Issuer as to the terms and conditions set forth in the Prospectus.

4. By tendering old notes in the Exchange Offer, you acknowledge that the Exchange Offer is being made in reliance upon interpretations contained in no-action letters issued to third parties by the staff of the Securities and Exchange Commission (the “SEC”), including Exxon Capital Holdings Corp., SEC No-Action Letter (available April 13, 1989), Morgan Stanley & Co., Inc., SEC No-Action Letter (available June 5, 1991) and Shearman & Sterling, SEC No-Action Letter (available July 2, 1993), that the new notes issued in exchange for the old notes pursuant to the Exchange Offer may be offered for resale, resold and otherwise transferred by holders thereof without compliance with the registration and prospectus delivery provisions of the Securities Act (other than a broker-dealer who purchased old notes exchanged for such new notes directly from the Issuer to resell pursuant to Rule 144A or any other available exemption under the Securities Act and any such holder that is an “affiliate” of the Issuer within the meaning of Rule 405 under the Securities Act), provided that such new notes are acquired in the ordinary course of such holders’ business and such holders are not participating in, and have no arrangement with any other person to participate in, the distribution of such new notes.

5. By tendering old notes in the Exchange Offer, you hereby represent and warrant that:

(a) the new notes acquired pursuant to the Exchange Offer are being obtained in the ordinary course of business of you, whether or not you are the holder;

(b) you have no arrangement or understanding with any person to participate in the distribution of old notes or new notes within the meaning of the Securities Act;

(c) you are not an “affiliate,” as such term is defined under Rule 405 promulgated under the Securities Act, of the Issuer; and

(d) if you are a broker-dealer, that you will receive the new notes for your own account in exchange for old notes that were acquired as a result of market-making activities or other trading activities and that you acknowledge that you will deliver a prospectus (or, to the extent permitted by law, make available a prospectus) in connection with any resale of such new notes.

You may, if you are unable to make all of the representations and warranties contained in Item 5 above and as otherwise permitted in the Registration Rights Agreement (as defined below), elect to have your old notes registered in the shelf registration statement described in the Registration Rights Agreement, dated as of June 10, 2011 (the “Registration Rights Agreement”), by and among the Issuer, the Guarantors (as defined therein), and the Initial Purchasers (as defined therein). Such election may be made by notifying the Issuer in writing at Nine Greenway Plaza, Suite 300, Houston, Texas 77046, Attention: General Counsel. By making such election, you agree, as a holder of old notes participating in a shelf registration, to indemnify and hold harmless the Issuer, each of the directors of the Issuer, each of the officers of the Issuer who signs such shelf registration statement, each person who controls the Issuer within the meaning of either the Securities Act or the Securities Exchange Act of 1934, as amended, and each other holder of old notes, from and against any and all losses, claims,

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damages or liabilities caused by any untrue statement or alleged untrue statement of a material fact contained in any shelf registration statement or prospectus, or in any supplement thereto or amendment thereof, or caused by the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; but only with respect to information relating to you furnished in writing by or on behalf of you expressly for use in a shelf registration statement, a prospectus or any amendments or supplements thereto. Any such indemnification shall be governed by the terms and subject to the conditions set forth in the Registration Rights Agreement, including, without limitation, the provisions regarding notice, retention of counsel, contribution and payment of expenses set forth therein. The above summary of the indemnification provision of the Registration Rights Agreement is not intended to be exhaustive and is qualified in its entirety by the Registration Rights Agreement.

6. If you are a broker-dealer that will receive new notes for your own account in exchange for old notes that were acquired as a result of market-making activities or other trading activities, you acknowledge by tendering old notes in the Exchange Offer, that you will deliver a prospectus in connection with any resale of such new notes; however, by so acknowledging and by delivering a prospectus, you will not be deemed to admit that you are an “underwriter” within the meaning of the Securities Act.

7. If you are a broker-dealer and old notes held for your own account were not acquired as a result of market-making or other trading activities, such old notes cannot be exchanged pursuant to the Exchange Offer.

8. Any of your obligations hereunder shall be binding upon your successors, assigns, executors, administrators, trustees in bankruptcy and legal and personal representatives.

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INSTRUCTIONS

FORMING PART OF THE TERMS AND CONDITIONS OF THE EXCHANGE OFFER

Any confirmation of a book-entry transfer to the Exchange Agent’s account at DTC of old notes tendered by book-entry transfer (a “Book-Entry Confirmation”), as well as Agent’s Message and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein prior to the Expiration Date.

Tenders of old notes will be accepted only in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof. The entire principal amount of old notes delivered to the Exchange Agent will be deemed to have been tendered unless otherwise communicated to the Exchange Agent. If the entire principal amount of all old notes is not tendered, then old notes for the principal amount of old notes not tendered and new notes issued in exchange for any old notes accepted will be delivered to the holder via the facilities of DTC promptly after the old notes are accepted for exchange.

All questions as to the validity, form, eligibility (including time of receipt), acceptance, and withdrawal of tendered old notes will be determined by the Issuer, in its sole discretion, which determination will be final and binding. The Issuer reserves the absolute right to reject any or all tenders not in proper form or the acceptance for exchange of which may, in the opinion of counsel for the Issuer, be unlawful. The Issuer also reserves the absolute right to waive any of the conditions of the Exchange Offer or any defect or irregularity in the tender of any old notes. The Issuer’s interpretation of the terms and conditions of the Exchange Offer (including the instructions on the Letter of Transmittal) will be final and binding on all parties. Unless waived, any defects or irregularities in connection with tenders of old notes must be cured within such time as the Issuers shall determine. Although the Issuer intends to notify holders of defects or irregularities with respect to tenders of old notes, neither the Issuer, the Exchange Agent, nor any other person shall be under any duty to give notification of any defects or irregularities in tenders or incur any liability for failure to give such notification. Tenders of old notes will not be deemed to have been made until such defects or irregularities have been cured or waived. Any old notes received by the Exchange Agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned by the Exchange Agent to the tendering holders, unless otherwise provided in the Letter of Transmittal, promptly following the Expiration Date.

The Issuer reserves the absolute right to waive, in whole or part, up to the expiration of the Exchange Offer, any of the conditions to the Exchange Offer set forth in the Prospectus or in this Letter of Transmittal.

No alternative, conditional, irregular or contingent tender of old notes will be accepted.

Requests for assistance or for additional copies of the Prospectus or this Letter of Transmittal may be directed to the Exchange Agent at the address or telephone number set forth on the cover page of this Letter of Transmittal. Holders may also contact their broker, dealer, commercial bank, trust company or other nominee for assistance concerning the Exchange Offer.

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Tenders may be withdrawn only pursuant to the limited withdrawal rights set forth in the Prospectus under the caption “Exchange Offer—Withdrawal of Tenders.”

There is no procedure for guarantee of late delivery in the Exchange Offer.

IMPORTANT: BY USING THE ATOP PROCEDURES TO TENDER OLD NOTES, YOU WILL NOT BE REQUIRED TO DELIVER THIS LETTER OF TRANSMITTAL TO THE EXCHANGE AGENT. HOWEVER, YOU WILL BE BOUND BY ITS TERMS, AND YOU WILL BE DEEMED TO HAVE MADE THE ACKNOWLEDGMENTS AND THE REPRESENTATIONS AND WARRANTIES IT CONTAINS, JUST AS IF YOU HAD SIGNED IT.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Under the provisions of Article 2.02.A(16) and Article 2.02-1 of the Texas Business Corporation Act and Article VI of our Amended and Restated Bylaws, we may indemnify our directors, officers, employees and agents and purchase and maintain liability insurance for those persons. Article 2.02-1 provides that any director or officer of a Texas corporation may be indemnified against judgments, penalties, fines, settlements and reasonable expenses actually incurred by him in connection with or in defending any action, suit or proceeding in which he is a party by reason of his position. With respect to any proceeding arising from actions taken in his official capacity as a director or officer, he may be indemnified so long as it shall be determined that he conducted himself in good faith and that he reasonably believed that such conduct was in the corporation’s best interests. In cases not concerning conduct in his official capacity as a director or officer, a director may be indemnified as long as he reasonably believed that his conduct was not opposed to the corporation’s best interests. In the case of any criminal proceeding, a director or officer may be indemnified if he had no reasonable cause to believe his conduct was unlawful. If a director or officer is wholly successful, on the merits or otherwise, in connection with such a proceeding, such indemnification is mandatory.

Our articles of incorporation provide for indemnification of our directors to the full extent permitted by applicable law. Article VI of our bylaws provides, in general, that we will indemnify our directors under the circumstances permitted under the Texas Business Corporation Act. In addition, we have entered into indemnification agreements with our directors. These agreements provide that if a director is a party or is threatened to be made a party to any action, we will indemnify the director and hold the director harmless against any and all liabilities or losses incurred in connection with such action if it arises out of or is related to the fact that the director is or was serving as a director, to the fullest extent permitted by then applicable law. Further, if Texas law is amended to authorize the further elimination or limitation of directors’ liability, then the liability of our directors will automatically be limited to the fullest extent provided by law.

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Schedules are omitted because they either are not required or are not applicable or because equivalent information has been included in the financial statements, the notes thereto or elsewhere herein.

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Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrants, we have been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by a registrant of expenses incurred or paid by a director, officer or controlling person of such registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, such registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

Each registrant hereby undertakes:

To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser, if such registrant is subject to Rule 430C, each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

That, for the purpose of determining liability of such registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities, in a primary offering of securities of such registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if

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the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(a) any preliminary prospectus or prospectus of the undersigned registrants relating to the offering required to be filed pursuant to Rule 424;

(b) any free writing prospectus relating to the offering prepared by or on behalf of such registrant or used or referred to by the undersigned registrants;

(c) the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrants or their securities provided by or on behalf of such registrant; and

(d) any other communication that is an offer in the offering made by such registrant to the purchaser.

That, for purposes of determining any liability under the Securities Act of 1933, each filing of a registrant’s annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

To deliver or cause to be delivered with the prospectus, to each person to whom the prospectus is sent or given, the latest annual report to security holders that is incorporated by reference in the prospectus and furnished pursuant to and meeting the requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of 1934; and, where interim financial information required to be presented by Article 3 of Regulation S-X are not set forth in the prospectus, to deliver, or cause to be delivered to each person to whom the prospectus is sent or given, the latest quarterly report that is specifically incorporated by reference in the prospectus to provide such interim financial information.

To respond to requests for information that is incorporated by reference into the prospectus pursuant to Items 4, 10(b), 11, or 13 of this Form, within one business day of receipt of such request, and to send the incorporated documents by first class mail or other equally prompt means. This includes information contained in documents filed subsequent to the effective date of the registration statement through the date of responding to the request.

To supply by means of a post-effective amendment all information concerning a transaction, and the company being acquired involved therein, that was not the subject of and included in the registration statement when it became effective.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on November 4, 2011.

Each person whose signature appears below appoints John D. Gibbons and Thomas F. Getten, and each of them, any of whom may act without the joinder of the other, as his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement and any Registration Statement (including any amendment thereto) that is to be effective upon filing pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he might or would do in person, hereby ratifying and confirming all that said attorney-in-fact and agent or any of them or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and the dates indicated.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on November 4, 2011.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on November 4, 2011.