含AVO效应的转换波速度分析方法

摘要

当转换波地震记录存在振幅值随炮检距变化,尤其是极性发生反转时,传统转换波速度分析计算结果不准确.为此,按照PP波AB相似系数速度分析方法,解决PP波AVO效应的思路,对存在AVO现象的转换波资料进行AB相似系数方法的拓展,推导出用于解决转换波含有AVO现象的AB相似系数方法,为提高转换波速度分析精度提供了理论支撑.%Conventional velocity analysis results of converted wave are inaccurate when amplitude change with offset existing in converted wave seismic record, especially polarity reversed. Therefor, based on the consideration of AB similar coefficient velocity analysis of PP wave to resolve the AVO effection, the authors extend converted wave data with AVO phenomenon by AB similar coefficient method, and derive AB similar coefficient method to settle the converted wave with AVO phenomenon, which provide theoretical support to improve the accuracy in converted wave velocity analysis.