Prestack v(z) f-k migration from common-offset sections

Xinxiang Li, Gary F. Margrave

A scheme of migration from separated common-offset sections using the v(z) f-k nonstationary filtering theory is presented in this paper. It is a direct extension of the v(z) f-k CDP-offset domain prestack migration algorithm for the whole prestack data volume. This migration scheme provides high quality migration images and opportunities for migration error correction, especially for converted wave data migration where migration velocities are difficult to observe. The current computer implementation of the algorithm is accurate but very time consuming. Along with the migration algorithm, partial NMO required by common-offset binning before NMO correction is also discussed.