3D VSP Converted Wave Depth Migration

M-16 3D VSP CONVERTED WAVE DEPTH MIGRATION P. BICQUART and L. MORLEY Summary 1 WesternGeco 10001 Richmond Avenue P.O. Box 2469 Houston TX 77252-2469 USA Even as surface-seismic surveys have moved to increasing levels of product sophistication over the last twenty years the borehole-seismic industry has continued to maintain step. Initial product offerings in near-offset VSPs gave way to 2D walkaway surveys which in turn were upstaged by full 3D/3C acquisition and processing. Indeed the ability of 3D VSPs to image small-scale features in the reservoir was recently demonstrated in a paper by Constance et al (1999). These authors showed