Multiclient Seismic Data

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Multiclient Seismic Data

7. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the six months ended June 30, 2013 was as follows:

	(Stated in millions)
Balance at December 31, 2012	$	518
Capitalized in period		222
Charged to expense		(106	)
Balance at June 30, 2013	$	634