Anisotropy Pays

摘要

Significant improvements in defining salt boundaries and in positioning reflectors and salt overhangs by properly accounting for the effect of anisotropy were achieved by TGS-NOPEC Geophysical Co. (TGS) in its Mississippi Canyon Revival survey covering some 660 Gulf of Mexico OCS blocks. Success hinged on the strategic combination of a well tying aniso-tropic sediment model, anisotropic pre-stack Kirchhoff migration, modeling of salt bodies with overhangs, and iterations of both supra-and subsalt tomography on a regional scale.