TGS Announces 3D Seismic Onshore Survey in the Uinta Basin

23 Oct 2025 07:00 CEST

OSLO, Norway (23 October 2025) - TGS, a global provider of energy data and
intelligence, announces the Roosevelt 3D seismic onshore survey in the Uinta
Basin. Covering 202 square miles of full fold data, this survey marks TGS' first
multi-client project in the region and a significant step in advancing
exploration within one of North America's prominent basins.

Kristian Johansen, CEO of TGS, commented, "The Roosevelt 3D survey is a pivotal
milestone in our expansion into the Uinta Basin. Through the application of
advanced subsurface imaging technologies, we are delivering high-resolution data
that enhances geological modeling, identifies critical subsurface features and
supports informed reservoir exploration and development decisions."

The survey targets key formations including the Green River, Wasatch and
Mesaverde formations, employing an AVO & Phase Compliant processing flow,
applying such techniques as Ray Based Image Correction & Optimization (RICO),
Dynamic Matching diving wave and reflection FWI, and OVT PSDM & PSTM by the TGS
Land processing team. Additionally, the survey covers 667 wells and includes
459 LAS logs and 2,649 rasters, providing a comprehensive dataset that supports
reservoir modeling and decision-making.

With the future of exploration in mind, the survey's flexible design ensures it
can adapt to the evolving needs of the industry, with plans to integrate depth
imaging capabilities in subsequent phases. To support ongoing exploration
efforts, receiver tails have been implemented to allow continuous data
acquisition, offering long-term adaptability for future exploration and
development projects in the region.

Recording for the Roosevelt 3D will begin in late Q4 2025, with final
acquisition expected to conclude in fall 2026. Preliminary data will be
available during 2026, and the fully processed dataset is scheduled for
completion by year-end 2026.

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 seismic 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
All statements in this press release other than statements of historical fact
are forward-looking statements, which are subject to a number of risks,
uncertainties and assumptions that are difficult to predict and are based upon
assumptions as to future events that may not prove accurate. These factors
include volatile market conditions, investment opportunities in new and existing
markets, demand for licensing of data within the energy industry, operational
challenges, and reliance on a cyclical industry and principal customers. Actual
results may differ materially from those expected or projected in the forward-
looking statements. TGS undertakes no responsibility or obligation to update or
alter forward-looking statements for any reason.

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