Constituent Porous Transverse Isotropic Medium Seismic Wave Propagation Simulation Research

In the seismic prospecting, numerical simulation is an efficient method in which we study the seismic waves'propagation in all kinds of medium so as to be better working on the seismic data of acquiring, processing, explanation and backward. Wave equations numerical simulation is actually calculate the solution of seismic waves'equations which contains all information of seismic waves'propagation under different medium situation. Trough the seismic numerical simulation, we can study the seismic waves'mechanism, validate and modify explanation methods and research the reverse questions, which has significant meanings in the seismic data acquiring, data processing & explanation and lithology evaluation. So this paper's work becomes more and more necessary as 3D seismic prospecting and complex medium fine imagination's popularly carrying out.Isotropic medium is the foundation of other medium. But the real stratum is more complex, which is not only asymmetry, viscidity but also bears anisotropism. Transverse isotropic medium is one of the most popular anisotropic medium comparing to reality. In this paper, we first carried out our work from isotropic medium, and then extended to the transverse isotropic medium; at last draw into component porous medium. In the component porous medium, people can study the wave's propagation rules and descript the underground stratum structure and lithology character, which has very important theory and reality meanings.In this paper, we deduced the 2D transverse isotropic porous medium wave propagation equations, and used the finite difference method to calculate. We finally got the snapshot and CDP record of the medium, in which we can find the P and S wave, reflection and transmission wave. At the same time we also studied the seismic wave's property variations as the porosity changing. Because the numerical dispersion weakens the seismic record, we utilized the Flux-Correction Transport method to eliminate the numerical dispersion and emphasize reflection waves.