双平方根方程谐波分解法提取角度道集及AVO反演

Double-square-root Equation Based Harmonic Wave Decomposition to Extract Angle Gathers and AVO Inversion

AVO反演的精度取决于所用振幅是否准确,叠前偏移可以使振幅归位同时校正非均质地层引起的振幅畸变,通过叠前偏移改善AVO反演的精度已成为新的研究热点。研究综合了保幅偏移、角度道集提取以及AVO反演等前人的工作,对基于双平方根方程的谐波分解法进行了改善,获得了更高精度的角度道集,通过模型数据与实际数据试算验证了方法的可行性。

Accuracy of AVO inversion depended on the amplitude,prestack imgration could correct the amplitude distortion caused by nonhomogeneous strata,to improve the accuracy of AVO inversion with prestack migration was a new skill.The methods of true amplitude migration,angle gathers extraction and AVO inversion were studied based on double-square-root equation with the harmonic decomposition method to get a high-precision angle gathering through the model data and actual data to verify the feasibility of the method.