Horizon-based residual depth migration velocity analysis

摘要

A method is disclosed for processing seismic data. The method includes prestack depth migrating (32) the seismic data to generate common image gathers using an initial velocity-depth model (33). Horizons in the migrated seismic data are selected (34). Residual migration velocity analysis (35) in the depth-offset domain is performed with respect to each selected horizon, and the velocity-depth model is updated based on the residual migration velocity analysis.