Removing Distortions Caused by Water Velocity Variations – Method for Dynamic Correction

G-42 REMOVING DISTORTIONS CAUSED BY WATER VELOCITY VARIATIONS – METHOD FOR DYNAMIC CORRECTION Abstract 1 Physical changes in ocean properties may occur during marine acquisition that can cause variations in water velocity. The result is a dynamic difference in traveltimes between overlapping infill data acquired at a later date. Such timing discrepancies may prevent accurate merging and imaging of the data. Unfortunately classical wave-equation solutions to this problem are typically impractical for 3D marine geometries. We present an approximate version of wave-equation layer replacement that addresses the temporal errors in data from Nova Scotia. Introduction. During marine acquisition deficiencies in