OSLO, Norway (1 October 2026) – TGS, a leading global provider of energy data and intelligence, announces a 3D PSDM Multi-Parameter-FWI reprocessing project covering approximately 514 square kilometers over PETRONAS’ 2025 Megah discovery in Block SB-3K, offshore Sabah, Malaysia.

The project will apply TGS' advanced Elastic Multi-Parameter Full Waveform Inversion and depth imaging technologies on its own legacy Geostreamer Sabah multi-client 3D Phase 2 dataset, acquired in 2017. The project aims to deliver an improved dataset, utilizing a high-resolution velocity model and diffraction imaging across the Megah Field. Processing began in July 2026, with final products scheduled for April 2027.

"The Megah discovery has reinforced the exploration potential of this area, and advanced reprocessing can play an important role in reducing subsurface uncertainty," said EVP Multi-Client David Hajovsky. "This project highlights TGS' ability to apply leading imaging workflows where improved subsurface definition can directly support exploration and appraisal decisions."

The reprocessed data will support more confident geological interpretation, prospect evaluation, and future appraisal well planning.

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.

For media inquiries, contact:

Bård Stenberg

IR & Business Intelligence

investor@tgs.com