Multiclient Seismic Data

12 Months Ended

Dec. 31, 2017

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data

7. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data is as follows:

(Stated in millions)
	2017			2016
Balance at beginning of year	$	1,073		$	1,026
Capitalized in period		276			630
Charged to expense		(377	)		(385	)
Impairment charge (see Note 3)		(245	)		(198	)
	$	727		$	1,073