Segment Information

3 Months Ended

Jun. 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 (“IPM”) 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 production activities of IPM.

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)
	Second Quarter 2011						Second Quarter 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	2,461		$	602		$	2,302	$	554
Drilling		3,458			538			1,524		286
Reservoir Production		3,060			613			2,088		249
Eliminations & other		11			(3	)		23		31
		8,990			1,750			5,937		1,120
Distribution		637			24			—		—
Eliminations		(6	)		—			—		—
		631			24			—		—
Corporate & other		—			(135	)		—		(89	)
Interest income (1)		—			10			—		11
Interest expense (2)		—			(69	)		—		(49	)
Charges (see Note 2)		—			(82	)		—		—
	$	9,621		$	1,498		$	5,937	$	993

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

	(Stated in millions)
	Six Months 2011						Six Months 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	4,654		$	1,062		$	4,549	$	1,123
Drilling		6,662			1,005			2,979		560
Reservoir Production		5,777			1,141			3,971		408
Eliminations & other		18			(3	)		35		64
		17,111			3,205			11,534		2,155
Distribution		1,238			46			—		—
Eliminations		(12	)		—			—		—
		1,226			46			—		—
Corporate & other		—			(278	)		—		(170	)
Interest income (1)		—			19			—		24
Interest expense (2)		—			(140	)		—		(92	)
Charges (see Note 2)		—			(116	)		—		(35	)
	$	18,337		$	2,736		$	11,534	$	1,882

(1)	Excludes interest income included in the segment results ($- million in 2011; $7 million in 2010).
(2)	Excludes interest expense included in the segment results ($2 million in 2011; $7 million in 2010).