Suspended Exploratory Well Costs (Tables)

6 Months Ended

Jun. 30, 2011


	June 30,			December 31,
	2011			2010
Beginning balance at January 1	$	23,908		$	19,052
Additions to capitalized exploratory well costs pending the determination of proved reserves		35,463			28,897
Reclassifications based on determination of proved reserves		(11,619	)		(24,041	)
Capitalized exploratory well costs charged to expense		—			—

Balance at end of period		47,752			23,908
Less exploratory well costs that have been capitalized for a period of one year or less		(42,519	)		(13,181	)

Capitalized exploratory well costs that have been capitalized for a period greater than one year	$	5,233		$	10,727

Number of projects that have exploratory well costs that have been capitalized for a period greater than one year		3			4

Aging of capitalized exploratory well costs that have been suspended for more than one year


	Total		2011		2010		2009		2008

Capitalized exploratory well costs that have been capitalized for more than one year	$	5,233	$	255	$	334	$	3,065	$	1,579

- Definition

Tabular disclosure of the amount of exploratory well costs that have been capitalized after the completion of drilling and the number of projects for which those costs relate. Additionally, for exploratory well costs that have been capitalized for periods greater than one year at the most recent balance sheet date, this block of text may be used to disclose an aging of those amounts by year, or by using a range of years, and the number of projects to which those costs relate.

+ References+ Details