TI介质裂纹散射研究

Research on crack scattering in transversally isotropic medium

本文把地质构造的复杂形态，如断层、地堑、尖灭、不整合等视为裂纹群组合体，由此我们阐述了横向各向同性介质（TI介质）的基本概念及其波传播的基本方程，从而给出了TI介质中裂纹对P波和SH波散射场的远场解析式与数值结果。该项研究对于地震衍射CT以及裂隙几何形状（方位、大小、厚度）的探测均具有理论意义与实用价值。

Complicated geologic configuration such as fault, graben, pinch, uncon formity and so on can be considered as a crack system. We detail the basic concept of transversally-isotropic medium and the wave equation in the medium,thus deducing the far-field analytic and numerical results of P and SH-wave scattering fields caused by cracks in the medium. The research result is very useful to both seismic diffraction tomography and crack determination including orientation,size and thickness.