Multiclient Seismic Data

9 Months Ended

Sep. 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 nine months ended September 30, 2018 was as follows:

(Stated in millions)
Balance at December 31, 2017	$	727
Capitalized in period		63
Charged to expense		(151	)
Balance at September 30, 2018	$	639