A MATLAB version of Equivalent Offset Migration (EOM)

John C. Bancroft

Equivalent offset migration continues to be a viable method of prestack migration that is used in anisotropic prestack depth migrations, but is more commonly used in prestack time migrations. The continued interest has prompted further developments in a MATLAB computing environment. This version uses a script or text file to define files and parameters. The input data are required to be in SEGY format that have been corrected to a horizontal datum, all statics applied, but with no moveout correction. The output is a SEGY file of CSP gathers, which are ready for velocity analysis. The moveout velocity of these gathers is of the RMS type that is independent of dip. Moveout correction, amplitude scaling, and stacking complete the prestack migration.