High-order Finite Difference Prestack Reverse Time Depth Migration

This dissertation mainly studied the project of migration in seismic data process. In order to achieve higher computational efficiency, shot sources and shot records were synthetized and parallel algorithm was proposed. The accuracy of this method is as good as Pseudospectral Method. The result of Mamousi model could prove the accuracy, efficiency and practice of this algorithm.This dissertation reviewed migration technology history from such phase shift migration as one way wave equation stacked2D migration method to such prestack reverse time depth migration as two way wave equation and theory of migration imaging. In order to further understanding of those theory, we calculated simple models. Also, we evaluate those theory. At last, we proposed high order finite difference parallel depth migration algorithm.