Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities

12 Months Ended

Dec. 31, 2011

Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities

Schedule 3 – Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities

(Millions of dollars)	United States			Canada		Malaysia		United Kingdom			Republic of the Congo			Other		Total
Year Ended December 31, 2011
Property acquisition costs
Unproved	$	233.8			18.5		0.0		0.0			0.0			27.0		279.3
Proved		0.0			0.0		0.0		0.0			23.5			0.0		23.5
Total acquisition costs		233.8			18.5		0.0		0.0			23.5			27.0		302.8
Exploration costs*		253.2			76.0		0.7		0.5			0.5			231.6		562.5
Development costs*		263.9			871.9		705.5		30.5			78.7			3.8		1,954.3
Total costs incurred		750.9			966.4		706.2		31.0			102.7			262.4		2,819.6
Charged to expense
Dry hole expense		0.6			50.6		0.1		0.0			18.1			181.6		251.0
Geophysical and other costs		35.9			10.2		11.0		0.5			2.9			60.2		120.7
Total charged to expense		36.5			60.8		11.1		0.5			21.0			241.8		371.7
Property additions	$	714.4			905.6		695.1		30.5			81.7			20.6		2,447.9
Year Ended December 31, 2010
Property acquisition costs
Unproved	$	129.8			78.6		0.0		0.0			0.0			34.4		242.8
Proved		0.0			22.0		0.0		0.0			0.0			0.0		22.0
Total acquisition costs		129.8			100.6		0.0		0.0			0.0			34.4		264.8
Exploration costs*		204.1			1.8		99.6		6.7			93.5			67.7		473.4
Development costs*		98.3			721.0		396.7		15.5			132.3			2.0		1,365.8
Total costs incurred		432.2			823.4		496.3		22.2			225.8			104.1		2,104.0
Charged to expense
Dry hole expense		(1.4	)		0.0		14.3		15.2			35.5			26.5		90.1
Geophysical and other costs		37.1			1.9		5.5		1.0			20.9			27.8		94.2
Total charged to expense		35.7			1.9		19.8		16.2			56.4			54.3		184.3
Property additions	$	396.5			821.5		476.5		6.0			169.4			49.8		1,919.7
Year Ended December 31, 2009
Property acquisition costs
Unproved	$	82.4			31.0		0.0		0.0			0.0			4.7		118.1
Proved		0.0			0.0		0.0		0.0			0.0			0.0		0.0
Total acquisition costs		82.4			31.0		0.0		0.0			0.0			4.7		118.1
Exploration costs*		89.7			9.9		114.4		0.1			19.1			79.4		312.6
Development costs*		197.2			321.4		695.9		15.1			187.5			2.0		1,419.1
Total costs incurred		369.3			362.3		810.3		15.2			206.6			86.1		1,849.8
Charged to expense
Dry hole expense		11.3			0.0		55.0		0.0			13.9			45.1		125.3
Geophysical and other costs		16.2			10.0		0.8		0.2			(3.1	)		32.6		56.7
Total charged to expense		27.5			10.0		55.8		0.2			10.8			77.7		182.0
Property additions	$	341.8			352.3		754.5		15.0			195.8			8.4		1,667.8
*      Includes non-cash asset retirement costs as follows:
2011
Exploration costs	$	2.0			0.3		0.0		0.0			0.0			0.0		2.3
Development costs		15.8			20.1		0.3		10.8			2.1			0.0		49.1
	$	17.8			20.4		0.3		10.8			2.1			0.0		51.4
2010
Exploration costs	$	3.4			0.0		0.0		0.0			0.0			0.0		3.4
Development costs		23.7			17.1		8.6		10.7			5.8			0.0		65.9
	$	27.1			17.1		8.6		10.7			5.8			0.0		69.3
2009
Exploration costs	$	5.0			0.0		0.0		0.0			0.0			0.0		5.0
Development costs		0.0			22.2		15.5		(2.2	)		0.9			0.0		36.4
	$	5.0			22.2		15.5		(2.2	)		0.9			0.0		41.4