Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations (Tables)

v3.8.0.1
Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2017
Asset Retirement Obligation Disclosure [Abstract]  
Summary of Changes to Asset Retirement Obligation

A summary of the changes to our ARO is as follows (in thousands):  

 

Balance, December 31, 2016

$

334,438

 

Liabilities settled

 

(56,226

)

Accretion of discount

 

12,820

 

Revisions of estimated liabilities (1)

 

13,984

 

Balance, September 30, 2017

 

305,016

 

Less current portion

 

29,456

 

Long-term

$

275,560

 

 

 

(1)

Revisions were primarily related to changes from sustained casing pressure at four fields.  Wells that experience sustained casing pressure require more days and greater work scope to complete the abandonment project.