Paper Summary

The Angola basin is characterized by steeply dipping sediments with rapid changes in dip direction particularly in mini-basins between salt bodies. This creates difficulties in anisotropic model building using grid-based tomography. Hence, we incorporated geologic dip information available from Kirchhoff Pre-stack Depth Migration (PSDM) stacks into the tomographic inversion to obtain better model updates which follow the geologic structure. This improves focusing, amplitude and continuity of reflectors after migration, and minimizes the use of additional smoothing after inversion.