Asset Retirement Obligation

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation [Abstract]

Asset Retirement Obligation

11. Asset Retirement Obligation

Our asset retirement obligations represent the estimated present value of the amount we will incur to plug, abandon and remediate our producing properties at the end of their productive lives in accordance with applicable laws. The following table summarizes the Company’s Asset Retirement Obligation transactions for the years ended December 31, 2017 and 2018 (in thousands):

Balance December 31, 2016	$	2,046
Accretion expense		141
Liabilities incurred		1
Liabilities settled		(45)
Liabilities sold properties		(11)
Revisions in estimated liabilities		138
Balance December 31, 2017	$	2,270
Accretion expense		141
Liabilities incurred		7
Liabilities settled		(41)
Revisions in estimated liabilities		(198)
Balance December 31, 2018	$	2,179

The revisions in estimated liabilities resulted from change in timing of wells to be plugged, change in inflation factor, and change in current plugging costs.