TGS kicks off Espirito Santo 3D seismic off Brazil

Oslo-listed seismic player TGS has launched the Espirito Santo multi-client 3D seismic survey offshore Brazil.

This survey should broaden the region’s 3D coverage while adding to the extensive offshore seismic library.

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It is a dual-azimuth survey, covering 2,694 square kilometres area.

For the purpose of the Espirito Santo Basin campaign, TGS mobilised the COSL vessel HYSY720.

Kristian Johansen, CEO at TGS, said, “We are pleased to commence this new survey as we grow our 3D library and further position TGS in the region. Further, we remain strongly committed to conducting our operations in a sustainable manner while providing first-class data and insights services offshore Brazil and all areas of operations around the world.”

Espirito Santo fast track data should be available in Q4 2021.

TGS said it will process the data using Dynamic Matching Full Wave Inversion (DM-FWI).

Specifically, DM-FWI is a technology that uses seismic reflection and refraction information to automatically update the velocity model and allows for superior, geologically coherent velocity models, improved subsurface analysis and reduced uncertainty. Dynamic Matching FWI achieves a step-change in velocity modelling where imaging in depth is clearer and more geologically consistent while overcoming many of the limitations of standard FWI, TGS explains.