Norwegian survey service firm TGS is set to start a new seismic survey in the Mauritania, Senegal, Gambia, Guinea Bissau and Guinea Conakry (MSGBC) Basin, offshore north-west Africa.

The Senegal North Ultra-Deep offshore three-dimensional (3D) survey covers an area of more than 5,100km² equipped with an advanced broadband acquisition set-up.

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Supported by Senegalese national oil company Petrosen, TGS has partnered with geophysical and geological services provider GeoPartners for this project. The company will use the BGP Prospector vessel for the survey.

This stand-alone northern Senegal survey is the continuation of the recently completed Jaan 3D seismic survey, which is TGS’ 3D dataset covering the southern portion of the MSGBC Basin. The survey will illuminate plays in the ultra-deep levels to build upon the success the basin has experienced with Sangomar (SNE) field, the GTA complex and Yakaar discoveries.

TGS CEO Kristian Johansen said: “This survey will provide the industry with essential subsurface insight ahead of Senegal’s Offshore License Round which is scheduled to commence early next year. SN-UDO-19 extends our coverage in a highly prospective region where TGS has been actively acquiring data for almost two years.

“The MSGBC Basin remains a key region for TGS where our unique combination of multibeam, seafloor sampling, seismic, interpretation and imaging products deliver the best subsurface knowledge in the industry.

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“As we expand offshore activities in the Southern Atlantic, we are well-positioned to provide our customers with valuable insights to further develop opportunities both offshore Senegal and in the wider region.”

The project is expected to last for 75 days, with fast track data available three months after the acquisition. TGS noted that the complete dataset will be available by the fourth quarter of 2020.