基于入射角的AVO近似及属性提取  

AVO approximation and attribute extraction based on the incident angle

作　　者：张广智[1] 郑静静[2] 王玉梅[2] 钮学民[2] 印兴耀[1] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266555 [2]中国石化胜利油田物探研究院,山东东营257022

出　　处：《石油地球物理勘探》2012年第4期578-583,682+513,共6页Oil Geophysical Prospecting

基　　金：国家油气重大专项(2011ZX05014-001-010HZ);中国石油科技创新基金(2011D-5006-0301);中央高校基本科研业务费专项资金(11CX05006A);地震叠前宽角度反演及储层表征技术研究(P09071)等资助

摘　　要：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.

关 键 词：AVO近似 属性提取 入射角 佐普里兹方程 波阻抗界面 反射系数 

分 类 号：P631[天文地球—地质矿产勘探]