Revisions of estimated liabilities due to Hurricane Ike
4,744
41,952
Revisions of estimated liabilities due to NTL 2010-G05 (1)
—
18,725
Revisions of estimated liabilities – all other
19,248
20,410
Asset retirement obligation, end of period
393,880
391,316
Less current portion
138,185
92,575
Long-term
$
255,695
$
298,741
(1)
NTL No. 2010-G05, "Decommissioning Guidance for Wells and Platforms" issued by the Bureau of Ocean Energy Management ("BOEM") (a) on September 15, 2010 and effective as of October 15, 2010, requires us to decommission any wells and platforms that have not been used during the past five years for exploration or production on active leases and are no longer capable of producing in paying quantities within three years. The accelerated time frame causes our estimated liabilities for ARO to be incurred in earlier periods, resulting in a higher present value of such liabilities.
(a)
In June 2010, the Minerals Management Service changed its name to the Bureau of Ocean Energy Management, Regulation and Enforcement ("BOEMRE"). In October 2011, the BOEMRE was split into three separate entities: the Office of Natural Resources Revenue ("ONRR"), which assumed the functions of the Minerals Revenue Management Program; the BOEM, which is responsible for managing development of the nation's offshore resources in an environmentally and economically responsible way; and the Bureau of Safety and Environmental Enforcement ("BSEE"), which is responsible for enforcement of safety and environmental regulations.