TGS has secured more than 100,000 contiguous sq km of modern seismic data.

Energy data and intelligence provider, TGS, has tapped offshore Mauritania and the wider West African Atlantic Margin for a large-scale multi-client 3D seismic project called the Mauritania MegaSurvey 

With this initiative, TGS has secured more than 100,000 contiguous square kilometers of modern seismic data, which will add to its existing offshore Mauritania multi-client library. Strategically positioned for extension and integration, the move will allow TGS to give operators easy and one-stop access across the offshore of Mauritania, making possible the regional interpretation of the full source to sink from nearshore to the ultradeep.

For an informed portfolio decision-making, operators can interpret complex regional-scale seismic with continuity across multiple exploration plays, simplifying robust basin screening and prospect maturation. The MegaSurvey's harmonised 3D seismic dataset over a large contiguous area eliminates uncertainties by ensuring confident geological interpretation backed by the clarity of structural and stratigraphic frameworks. Companies can leverage the survey for de-risking acreage evaluation before going ahead with drilling or licensing decisions.

TGS’ interests in the Mauritanian offshore is supported by the Mauritanian Ministry as its advanced datasets make the region attractive for exploration investment opportunities.

David Hajovsky, executive vice president of Multi-Client at TGS, said, “The Mauritania MegaSurvey delivers strategic regional value for our customers. By integrating with broader West African subsurface frameworks, the survey provides deeper insight into basin architecture and petroleum systems along the Atlantic Margin. This regional perspective enables operators to assess Mauritania in the context of neighboring proven and emerging basins, supporting play fairway analysis and a more robust understanding of cross-border geological trends.”

The Mauritania MegaSurvey further strengthens TGS’ multi-client leadership offshore West Africa and complements the company’s extensive portfolio of 2D seismic, 3D seismic, and well data across the region.

The 3D survey is set to start in December 2025.

Shearwater Geoservices has partnered with Harvex Geosolutions and the Nigerian Upstream Petroleum Regulatory Commission (NUPRC) to begin fresh multi-client seismic project offshore Nigeria

Supported by strong industry funding, the 3D survey is set to start in December 2025. Shearwater is gearing up to deploy its high-end vessel SW Duchess for the project, whereby it will be operational over a period of two months. It will heavily support survey work for extracting high-resolution subsurface data across the Western Niger Delta Basin which, in turn, will influence significant exploration decisions and future license rounds in one of West Africa’s most prospective oil and gas regions.

“This project underscores the growing momentum of our multi-client business and our key role in supporting exploration across key global basins,” said Irene Waage Basili, CEO of Shearwater. “By investing in high-quality seismic data, where we can both capture rapid returns and create longer-term value, we are enabling smarter decisions and helping to shape the future of energy security in West Africa and beyond.” 

Previously, Shearwater also announced service contract offshore Ghana, carrying out the region's first deepwater Ocean Bottom Node (OBN) seismic survey in the Jubilee and TEN fields. This contract was a result of the company's already well-established presence in West African regions, including the deployment of the SW Tasman vessel and Pearl node OBN platform. Since late 2024, these platforms have been instrumental in conducting OBN surveys across the region, starting with Côte d'Ivoire, and continuing with surveys in Angola.

The 4,300 sq km high-end data set will bring valuable insights. (Image source: Viridien)

As Angola gears up for its upcoming licensing round, Viridien has announced a new multi-client seismic reimaging programme over Angola’s highly prospective offshore Block 22

The 4,300 sq km high-end data set will bring valuable insight into underexplored structures along the Atlantic Hinge zone, following the same trend as the proven Cameia and Golfinho fields. Fast-track results are scheduled for delivery in Q1 2026 and final products in Q3/Q4 2026.

The Block 22 data set will be reimaged by using Viridien's latest proven proprietary technologies, including time-lag FWI, Q-FWI, Q-Kirchhoff and advanced deghosting and demultiple. This data will complement its 2,900 sq km of data over nearby block 20/11, giving operators access to a combined regional coverage of over 7,200 sq km of ultramodern broadband PSDM data to conduct regional pre-salt and post-salt play evaluation in the Kwanza Basin.

Dechun Lin, Head of Earth Data, Viridien, said, “Viridien is delighted to continue its strong relationship with Angola's national energy agency, ANPG (Agência Nacional de Petróleo, Gás e Biocombustíveis), and longstanding presence in Angola by committing to this new reimaging project which will support their important upcoming licensing round. We have the most modern 3D broadband seismic data available offshore Angola and will continue to generate value from it to provide critical support for industry decision-making and help to increase exploration success.”

TGS work is backed by modern seismic and aeromagnetic library. (Image source: TGS)

Energy intelligence firm, TGS, has extended its agreement with the Ministry of Petroleum and Mineral Resources (MOPMR) to the continued rights to market and license geophysical data covering Somalia’s offshore basins

The agreement will support TGS' vision to aid the progress of underexplored regions with its comprehensive regional data library for the evaluation of significant exploration potential. The company assures operators of the reliability of its datasets in assessing investment opportunities across numerous available offshore blocks.

In Somalia, TGS is exclusively offering valuable insights into more than 46,000-line kms of modern 2D seismic data and beyond 50,000 kms of aeromagnetic data. The data reflecting the region's geological framework and prospectivity is backed by the company's cutting-edge acquisition technology and advanced imaging solutions.

“This extension further underscores our long-term commitment to the Federal Republic of Somalia and its offshore licensing programme,” said David Hajovsky, executive vice president multi-client at TGS. “With access to our exclusive, modern seismic and aeromagnetic library we are ready to support the Ministry of Petroleum & Mineral Resources as they open up one of the world’s last frontier hydrocarbon provinces.”