The survey will total 25,000 kms of long offset seismic data in the offshore areas of multiple countries.

About 10,000 kms of seismic data has been acquired to date using the M/V Artemis Atlantic vessel and the remaining acquisition will continue into the second half of 2011.

The companies said that the data will improve the understanding of highly prospective areas along the northwest African Passive Margin and adds to TGS’ existing and continuous multi-client 2D seismic library along the African margin.

TGS will perform data processing, with the full program expected to be completed in 2012.