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Shearwater, TGS win offshore seismic contracts in India, Brazil
Two Oslo, Norway-listed owners will use survey ships for seismic investigations supporting exploration in hydrocarbon basins in the Indian and Atlantic oceans
Shearwater Geoservices has secured a contract to deliver various seismic surveys in a hydrocarbon basin in the Indian Ocean, starting in Q4 2025.
The Bergen, Norway-headquartered owner will use two vessels from its fleet to shoot a combination of 2D and 3D seismic surveys in the Mahanadi and Krishna-Godavari basins off the east coast for Oil India Limited (OIL).
During Q4 2025 and into Q1 2026, these two vessels will complete 4,000 km2 of 2D seismic surveys and 5,000 km2 of 3D surveys.
Shearwater chief executive Irene Waage Basili said Shearwater was returning to India for its 10th consecutive season to acquire high-quality data.
“We are a significant contributor to India’s strategy of lowering the country’s energy deficit, having supported both the national seismic programme and Indian oil companies with 2D, 3D and ocean-bottom node data acquisition,” she said.
“Building understanding of the geology in this promising region is key to unlocking future investment opportunities for our client.”
OIL has carried out exploration activities in the Mahanadi basin since 1979 and drilled 16 wells in various blocks in that time. It started exploration in the Krishna-Godavari basin in 2019 and is committed to acquiring seismic surveys and drilling six wells.
In Brazil, Oslo-listed TGS has secured funding to begin the PAMA Phase II multi-client survey in the Pará-Maranhao (PAMA) basin that lies within the country’s equatorial margin.
TGS is using one of its Ramform Titan-class vessels to shoot 11,500 km2 of 3D seismic surveys on prospective blocks from Q3 2025 to March 2026.
These blocks are currently under nomination for upcoming license rounds scheduled for 2026 and 2027.
The PAMA first phase covered 19,343 km2 over more than 25 future exploration blocks within this basin, which TGS said was “one of the world’s largest, most unexplored, and highly prospective basins.”
Initial studies have identified a functioning deepwater petroleum system in the Cretaceous and Paleogene layers in this basin, so it has attracted industry interest and funding for this latest multi-client survey.
"We experienced strong industry interest and support for our PAMA Phase I survey, as the equatorial margin represents one of the most exciting exploration frontiers globally,” said TGS chief executive Kristian Johansen.
“With PAMA Phase II, we are expanding our data coverage significantly, and by using our acquisition capabilities and imaging expertise, this survey will provide substantial value for our clients’ exploration activities in the Para-Maranhao basin.”
TGS also has a Ramform Titan-class vessel acquiring seismic data as part of the Megabar extension multi-client project in the Barreirinhas Basin of Brazil.
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