AVO approximation and attribute extraction based on the incident angle
Zhang Guangzhi1, Zheng Jingjing2, Wang Yumei2, Niu Xuemin2, Yin Xingyao1
1. School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266555,China;
2. Geophysical Research Institute,Shengli Geo-physical Company,Dongying,Shandong 257022,China
Abstract：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.
