3-D prestack depth migration and velocity model building

摘要

Prior to performing a full-volume 3-D prestack depth migration (preSDM), it is necessary to be confident that the velocity-depth model is reliable. The derivation of such a model is addressed here. However, we first review the limitations of poststack imaging techniques and describe 3-D tomographic inversion, which can be used to derive a good starting model for depth imaging.