Migration Velocity Analysis By Double Path-Integral Migration

The idea of path-integral imaging is to sum over the migrated<br>images obtained for a set of migration velocity models.<br>Those velocities where common-image gathers align<br>horizontally are stationary, thus favoring these images in<br>the overall stack. In this way, the overall image forms with<br>no knowledge of the true velocity model. However, the velocity<br>information associated with the final image can be<br>determined in the process. By executing the path-integral<br>imaging twice, weighting one of the stacks with the velocity<br>value, the stationary velocities that produce the final image<br>can then be extracted by a division of the two images. A<br>numerical example demonstrates that quantitative information<br>about the migration velocity model can be determined<br>by double path-integral migration.