Residual migration-velocity analysis in the plane-wave domain

摘要

Over the last few years, migration-velocity analysis methods have been developed for 2-D and 3-D models by extending the assumptions and approximations used for rms velocity models. Computational requirements for these analyses have increased dramatically because top-down layer-stripping migration is needed to derive interval velocities directly instead of using rms velocities and then converting into interval velocities. We estab- lish exact equations for 1-D and 2-D residual velocity analysis in the depth-plane-wave domain and use these in an iterative and interactive migration velocity anal- ysis program.