3-D MIGRATION OF CROSS-SPREAD DATA - RESOLUTION AND AMPLITUDE ASPECTS

Ideally, full prestack migration involves a 4-D integration along the source and receiver coordinates. Obviously, for cross-spread data (typ ical for land acquisition) this 4-D integration cannot be effectuated, An analysis is presented of the resolution and amplitude behavior of full prestack migration, applied to cross-spread data. Moreover, a pro posal is made to modify operators that partly compensate far the dimin ishing effects of the cross-spread aquisition geometry on amplitudes a nd resolution.