Quarterly report pursuant to Section 13 or 15(d)

Asset Retirement Obligations

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Asset Retirement Obligations
9 Months Ended
Sep. 30, 2013
Asset Retirement Obligation [Abstract]  
Asset Retirement Obligations
Asset Retirement Obligations

The table below summarizes the Company’s asset retirement obligations activity for the nine months ended September 30, 2013:
Asset retirement obligations at January 1, 2013
 
$
13,301

Accretion expense
 
1,556

Liabilities incurred
 
624

Liabilities settled
 
(497
)
Revisions to estimate
 
(3,477
)
Asset retirement obligations at end of period
 
11,507

Less: Current asset retirement obligations
 
6,002

Long-term asset retirement obligations at September 30, 2013
 
$
5,505


Certain of the Company’s operating agreements require that assets be restricted for future abandonment obligations. Amounts recorded on the Consolidated Balance Sheets as restricted investments were $3,800 at September 30, 2013. These investments include primarily U.S. Government securities, and are held in abandonment trusts dedicated to pay future abandonment costs for several of the Company’s crude oil and natural gas properties.

On October 17, 2013, the Company announced entrance into an agreement to sell its interest in the Medusa field, Medusa Spar LLC, and substantially all of its Gulf of Mexico shelf properties to W&T. Under the agreement, which is expected to close on or before November 30, 2013, W&T will assume an estimated $4,500 of the ARO related to these offshore assets. See Note 2 for additional information.