Multiclient Seismic Data

6 Months Ended

Jun. 30, 2018

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data

6.   Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the six months ended June 30, 2018 was as follows:

(Stated in millions)
Balance at December 31, 2017	$	727
Capitalized in period		47
Charged to expense		(88	)
Balance at June 30, 2018	$	686