METHOD FOR EXTENDING THE LATERAL SUBSURFACE COVERAGE IN VSP SURVEYS

摘要

ABSTRACT OF THE DISCLOSUREIn a VSP survey, the subsurface coverage of thebounce points of primary reflections is limited to one-halfthe offset between a borehole and an acoustic-source point.The subsurface coverage may be extended by use of selectedmultiply-reflected wavefield arrivals.