3D VTI, Angle-dependent Imaging of PP Borehole Seismic Data

We extended 3D anisotropic Pre-Stack Depth Migration (PreSDM) to be applicable to borehole seismic data. We adjusted PreSDM to produce angle-dependent Common Image Point (CIP) gathers using both types of imaging conditions: cross-correlation and deconvolution. We demonstrate the effectiveness of our method with 3D borehole seismic data from the Arabian Gulf, Saudi Arabia. The deconvolution imaging condition yields well-balanced migration amplitudes and produces suitable CIP gathers for anisotropic velocity model building and pre-stack elastic inversion. The final migrated results show an enhanced image of the target sand stringers both in the immediate vicinity and away from the borehole.