Prestack Kirchoff Time Migration for Anisotropic Media

P261 PRESTACK KIRCHOFF TIME MIGRATION FOR ANISOTROPIC MEDIA Abstract 1 Prestack Kirchhoff time migration for transversely isotropic media with a vertical symmetry axis (VTI media) is implemented using an analytical offset-midpoint traveltime equation; Cheop's pyramid equivalent equation for VTI media. This analytical equation is similar in structure to that of the familiar double-square-root (DSR) equation but far more complex. It includes higher order terms necessary to better handle anisotropy as well as vertical inhomogeneity. Application of the Kirchoff time migration method to the anisotropic Marmousi model and data demonstrates the effectiveness of the approach in better handling complex media in