TGS Dynamic Matching Full Waveform Inversion (DM FWI) workflow is a versatile solution with a proven record on various survey geometries and geological settings. The increased physics in E-DMFWI represents the next step in subsurface imaging: it significantly improves the focusing of velocity interfaces with strong contrast, resulting in improved imaging underneath complex structures.

 

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E-DMFWI: Superior Results in Legacy and Modern Acquisition 

Due to the elastic nature of the earth, Elastic Dynamic Matching FWI (E-DMFWI) has intrinsic advantages over the acoustic version, especially in geologically complex areas. The elastic wave equations can simulate both compressional (P waves) and shear waves (S waves), capturing more detailed information about the subsurface. TGS E-DMFWI algorithm achieves superior results in diverse complex geological settings and survey geometries, improving reservoir characterization and reducing exploration uncertainties.

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Gulf of America, Amendment I & II, in collaboration with SLB, featuring Elastic Dynamic Matching FWI (E-DMFWI) and FDR - Showcasing how complex salt bodies and intricate subsurface geology are illuminated and resolved using ultra-long offset sparse OBN acquisition combined with the advanced capabilities of TGS' E-DMFWI.
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Improved Physics for a Trusted and Versatile Solution 

Dynamic Matching FWI (DM FWI) has become the key algorithm in modern workflows to derive high-resolution velocity models. Benefiting from superior wavefield propagation physics in geologically complex areas, Elastic Dynamic Matching FWI (E-DMFWI) can produce accurate velocity models with greatly improved resolution compared to acoustic algorithms.  

E-DMFWI for Improved Reservoir Predictability

Elastic Dynamic Matching Full Waveform Inversion (E-DMFWI) Derived Reflectivity (FDR) addresses illumination challenges beneath salt canopies while improving reflector continuity and the clarity of salt-sediment interfaces. These advances are critical for identifying and de-risking salt-related traps and improving the predictability of reservoir presence, quality and continuity.  

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Legacy  WAZ streamer RTM
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E-DMFWI FDR
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Legacy velocity model and KPSDM
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Final velocity model and FDR

E-DMFWI for Complex Imaging

The application of E-DMFWI to multi-azimuth streamer data achieves superior imaging of mud volcanoes, small gas pockets and channels in the post-Messinian, as well as improved resolution of complex Messinian and pre-Messinian layers. As illustrated by this Nile Delta case study, incorporating elastic effects for both P- and S-waves reduces boundary smearing and enhances the accuracy of velocity models.  

E-DMFWI for DAS VSP

By employing the elastic wave equation for wavefield propagation, Dynamic Matching FWI produces an accurate velocity model that better represents the earth’s geology. Taking advantage of the contribution from converted P-wave energy, E-DMFWI improves illumination for DAS VSP data alleviating the limited fold coverage due to the specific acquisition geometries.

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DM FWI (Acoustic)
E-DMFWI

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