基于入射角的AVO近似及属性提取

AVO approximation and attribute extraction based on the incident angle

本文基于佐普里兹方程的Aki和Shuey近似式,利用斯内尔定律,建立了反射系数与上层入射角、岩石物性参数间新的近似表达式。此改进近似式将反射系数表示为上层入射角的函数,其计算结果的误差较现有常规方法小,为下一步准确提取AVO属性奠定了基础。应用本文近似式对模型和实际数据的处理均取得了显著效果。

Based on the Aki approximation and Shuey approximation formula of Zoeppritz equation,the new inherent relationship among the reflectivity,the incident angle of the upper layer and the petrophysical parameters is established by Snell's Law and petrophysical analysis.The new approximation equation is the function of the incident angle of the upper layer.This new approximation solved the problems that result from the actual computations and provided the foundation of the sequential extraction of exact AVO attributes.The application of this new method in both model data and real seismic data shows significant results.