Abstract
AbstractThe 3‐D wave equation prestack depth migration is one of the most important steps in the structure imaging and the inversion of elastic parameters of complex medium. It is very difficult to deal with for the implement of this technique relates not only to the innovation of the wavefield extrapolation theory but also large scale calculation. This paper is to get the result of the experiment and completely realize the 3‐D symplectic wave equation prestack depth migration of SEG/EAGE Salt and Overthrust model. We discuss in detail the imaging ability of our symplectic 3‐D prestack depth migration software system with complex geologic structures including the following topics: 1) The choice of imaging parameters , the effect on the migration result of the seismic wavelet and comparison between 2‐D and 3‐D prestack depth migration result of the Salt model. 2) The presentation of the impulse response of the Overthrust model. 3) The imaging result of the two international models indicates that our software system accommodate great transversal velocity variation and have ability of imaging complex geologic structures.
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