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SPECIAL REPORT: Integrating surface seismic velocity into subsurface interpretation in the gulf

06/02/2008
The critical role played by accurate seismic velocity measurements in imaging is well documented. Optimal summing of prestack time migrated (PSTM) data depends on accurate seismic velocity measurements, and the PSTM image quality is degraded when suboptimal velocity measurements are used in stacking the data.Seismic interval velocity models are needed for prestack depth migration (PSDM), and substandard velocity models yield substandard depth images. In both processing strategies, flat offset gathers are used to gauge the validity of the velocity used.Seismic velocities are also used to generate pore pressure and stress volumes for well planning and subsurface interpretation. Accurate PST...
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