Segment Information

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Segment Information

14. Segment Information

Schlumberger previously reported its results on the basis of five business segments — Schlumberger Oilfield Services, WesternGeco, M-I SWACO, Smith Oilfield and Distribution and by geographical areas within Schlumberger Oilfield Services. As a result of the acquisitions of Smith and Geoservices, the range of Schlumberger’s activities comprising exploration and production services is so broad that it has changed the primary way in which it allocates resources and assesses performance. Consequently, effective with the first quarter of 2011, Schlumberger changed its primary reporting to product group segments (the “Groups”).

The Groups are as follows:

• Reservoir Characterization Group — Consists of the principal technologies involved in the finding and defining of hydrocarbon deposits. These include WesternGeco, Wireline, Testing Services, Schlumberger Information Services and Data & Consulting Services.

• Drilling Group — Consists of the principal technologies involved in the drilling and positioning of oil and gas wells and is comprised of Bits & Advanced Technologies, M-I SWACO, Geoservices, Drilling and Measurements, Pathfinder, Drilling Tools and Remedial Services, Dynamic Pressure Management and Integrated Project Management well construction projects.

• Reservoir Production Group — Consists of the principal technologies involved in the lifetime production of oil and gas reservoirs and includes Well Services, Completions and Artificial Lift, together with the Subsea and Water and Carbon Services activities and the Schlumberger Production Management field production projects.

The Groups are collectively referred to as “Oilfield Services”. Additionally, Schlumberger also reports the Distribution business, acquired in the Smith transaction, as a separate segment.

All prior period segment disclosures have been recast to reflect the new segments.

	(Stated in millions)
	Third Quarter 2011						Third Quarter 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	2,488		$	610		$	2,282	$	525
Drilling		3,676			613			2,049		307
Reservoir Production		3,373			707			2,300		378
Eliminations & other		9			1			15		9
		9,546			1,931			6,646		1,219
Distribution		698			31			199		9
Eliminations		(15	)		—			—		—
		683			31			199		9
Corporate & other		—			(158	)		—		(83	)
Interest income (1)		—			9			—		10
Interest expense (2)		—			(69	)		—		(51	)
Charges and credits (see Note 2)		—			(27	)		—		836
	$	10,229		$	1,717		$	6,845	$	1,940

(1)	Excludes interest income included in the segment results ($1 million in 2011; $2 million in 2010).
(2)	Excludes interest expense included in the segment results ($1 million in 2011; $- million in 2010).

	(Stated in millions)
	Nine Months 2011						Nine Months 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	7,142		$	1,672		$	6,831	$	1,647
Drilling		10,339			1,618			5,028		867
Reservoir Production		9,150			1,848			6,271		786
Eliminations & other		27			(2	)		50		73
		26,658			5,136			18,180		3,373
Distribution		1,935			77			199		9
Eliminations		(27	)		—			—		—
		1,908			77			199		9
Corporate & other		—			(437	)		—		(251	)
Interest income (1)		—			28			—		34
Interest expense (2)		—			(208	)		—		(144	)
Charges and credits (see Note 2)		—			(143	)		—		801
	$	28,566		$	4,453		$	18,379	$	3,822

(1)	Excludes interest income included in the segment results ($1 million in 2011; $10 million in 2010).
(2)	Excludes interest expense included in the segment results ($4 million in 2011; $2 million in 2010).