Enhancements to 3-D pre-SDM salt-flank imaging

Here we present a technique for performing residual move-out correction of all CRP gathers output from the final iteration of a 3-D pre-stack depth mi gration. We Will show the effectiveness of this approach for improving the imaging of seismic events not explicitly described in the velocity-depth mo del, and for compensating for residual move-out resulting from small errors in the velocity-depth model. The results will be demonstrated on North Sea 3-D pre-stack depth migrated data examples.