VTI介质中井间地震三分量数据的波场特征

Wavefield characteristic of 3C crosswell seismic data in the VTI media

用波动方程的有限差分数值解法,模拟了井间地震观测到的VTI介质中传播的波场,合成井间地震共炮点的三分量记录,对比识别了野外实际井间地震三分量观测记录上的快纵波、慢纵波、快横波和慢横波,分析了各类波的传播速度和偏振特性,为井间地震数据的波场分离、不同类型波场的成像以及纵横波和快慢波的联合解释提供依据。

This paper simulates the 3C crosswell seismic data of a common source gathered in VTI medias with the finite difference method, and identifies the quick P wave, the slow P wave, the quick S wave and the slow S wave in the crossweU seismic field. And it analyses the waves transmitting velocity and polarity, which can provide the guidance for wavefiled separation of crosswell seismic data,imaging of different waves and combining interpretation of the P wave, the S wave, the quick and the slow waves.