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TGS ASA

Regulatory News Service Oct 23, 2025

3774_rns_2025-10-23_4b5562c7-f969-4af3-bfff-638f28af296b.html

Regulatory News Service

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TGS Announces 3D Seismic Onshore Survey in the Uinta Basin

TGS Announces 3D Seismic Onshore Survey in the Uinta Basin

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

[email protected]

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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