Exploratory Costs (Tables)

6 Months Ended

Jun. 30, 2011

Exploratory Costs

Capitalized Exploratory Well And Project Activity

	Three Months Ended June 30, 2011			Six Months Ended June 30, 2011
				(in thousands)
Beginning capitalized exploratory costs	$	80,530		$	96,193
Additions to exploratory costs pending the determination of proved reserves		140,081			214,345
Reclassification due to determination of proved reserves		(135,338	)		(195,682	)
Disposition of assets sold		—			(28,938	)
Exploratory well costs charged to exploration expense		(162	)		(807	)
Ending capitalized exploratory costs	$	85,111		$	85,111

Capitalized Exploratory Costs And The Number Of Projects For Which Exploratory Costs Have Been Capitalized

	June 30, 2011		December 31, 2010
	(in thousands, except project counts)
Capitalized exploratory costs that have been suspended:
One year or less	$	77,129	$	70,635
More than one year		7,982		25,558
	$	85,111	$	96,193
Number of projects with exploratory costs that have been suspended for a period greater than one year		1		3