TGS Announces Pelotas Norte Phase I Multi-client Survey Offshore Brazil

OSLO, Norway (17 November 2025) - TGS, a global leader in energy data and intelligence, is pleased to announce Pelotas Norte Phase I multi-client 3D survey in the Pelotas Basin, offshore southern Brazil. Phase I will encompass approximately 14,800 square kilometers across 21 exploration blocks, the majority of which lie in un-held acreage expected to be included in upcoming bid rounds.

A Ramform Titan-class vessel is scheduled to mobilize for the survey later in Q4, with project duration running into Q3 2026. The vessel is utilizing TGS GeoStreamer(®) technology, delivering high-resolution 3D seismic data delivery. The project is supported by industry funding.

The Pelotas Basin features early basin carbonates and passive margin clastic sequences, including three organic-rich intervals of Albian, Turonian and Paleocene ages. The basin attracts significant industry interest driven by its geological similarities to the conjugate margin and the proven hydrocarbon systems of West Africa.

Kristian Johansen, CEO of TGS, commented: "Exploration activity in the Pelotas Norte Basin is accelerating, with several major oil companies increasing their presence and commitment to the area. The Pelotas Norte Phase I multi-client survey significantly expands our seismic coverage. By leveraging our advanced acquisition capabilities and imaging expertise this survey will help our clients to better understand the basin's geological structures and derisk future exploration activities. Following the announcement of two large multi-client surveys in the Equatorial Margin earlier in Q3, the addition of Pelotas Norte Phase I brings the number of Ramform Titan-class vessels working offshore Brazil to three for the remainder of this year and well into next."

For more information, visit TGS.com or contact:

Bård Stenberg VP IR & Business Intelligence Mobile: +47 992 45 235 investor@tgs.com

About TGS

TGS provides advanced data and intelligence to companies active in the energy sector. With leading-edge technology and solutions spanning the entire energy value chain, TGS offers a comprehensive range of insights to help clients make better decisions. Our broad range of products and advanced data technologies, coupled with a global, extensive and diverse energy data library, make TGS a trusted partner in supporting the exploration and production of energy resources worldwide. For further information, please visit www.tgs.com (https://www.tgs.com/).

Forward Looking Statement

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