One Step Better than Static Corrections – The Topographic Datuming Operator

C-07 ONE STEP BETTER THEN STATIC CORRECTIONS - THE TOPOGRAPHIC DATUMING OPERATOR Abstract 1 We formulate an analytical expression of a new prestack operator the Topographic Datuming Operator (TDO). This datuming operator generalizes the operation of static corrections which is very well known in the seismic exploration community and widely used in land seismic data processing. TDO eliminates the essential assumption of vertical incidence to the Earth’s surface of the downward- and upward-propagating reflected wavefield which is not valid in the presence of high-velocity shallow layers and/or large offset-to-reflector depth ratios. The assumptions of equivalent constant velocities for the overburden