Near surface characterization by elastic full waveform inversion of surface waves

Accurate near-surface imaging in the Middle East is challenging due to strong velocity contrasts in the shallow geology. This technical article highlights the application of Elastic Full-Waveform Inversion (FWI) of surface waves, leveraging low-frequency virtual data from 3D interferometry and active surface waves to build a detailed shear velocity (Vs) model. Compared to legacy models, the updated Vs model delivers improved subsurface resolution, simplified geological structures, and better alignment with well markers, enhancing overall seismic imaging.