The ultimate challenge for shear-waves is to deliver amplitudes in depth and imaging reliability of P-waves, for estimation of reservoir quality, geomechanical parameters for well completion, and 3D/4D fluid-pressure characterization. Coherent converted P- to S-wave (PS-wave) depth imaging, a comprehensive joint P-S velocity estimation (transverse-isotropy, TI) and shear-splitting correction to principal components could enable more accurate multi-mode P-S inversion for VP/VS ratio and bulk density from seismic. In this case study, we investigate the Lupin 3D9C survey in Midland basin for the technical reliability of PS-wave imaging in depth. An important goal is to establish a common-earth-model of velocity and anisotropy to provide inversion ready depth gathers for P- and S-wavefields (PS, SH, SV). Final anisotropy analysis amplitude maps for each mode show potential sensitivity to fractures, faults and stress field intensity. These maps are computed after shear-wave splitting (SWS) analysis, by differencing the fast and slow (S1– S2) stack for each shear-wavefield. These maps show an E-W lineament identifies a strike-slip fault, not observed in P-wave depth slices. These results, shared learnings and suggestions for improvements are discussed for shear processing, advancing S-wave depth imaging for all modes and amplitude interpretation, including rock property estimation.

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