Conclusions

With noise commonly plaguing the interpretation of velocity semblance panels, super-gathers are an important tool for increasing signal both for stacking and residual velocities. Though super-gathers are normally treated as conventional gathers, significant improvements in the quality of semblance panels are achieved by applying dip corrections. An application of the technique to 3D land dataset produces high quality semblance panels over complex geological structures where relatively steep dips are present. The size of super-gathers can be increased significantly beyond the point at which semblance panels would degrade without the corrections. Because the full-volume correction can be easily integrated with existing tools, it is likely to be useful for many different velocity analysis applications, including automatic picking and residual analysis after depth migration.