French player CGG has been awarded a two-part ocean-bottom node (OBN) 4D seismic imaging project to be carried out in the Petrobras-operated Sapinhoa Surround pre-salt area in the prolific Santos basin offshore Brazil.

CGG has been subcontracted by US-based PXGEO, which ran a baseline 3D seismic survey in Sapinhoa Surround encompassing 575 square kilometres that is already being processed.

The 4D OBN campaign is designed to improve geological insight and assist Petrobras with better management of oil recovery and production development in the region.