Applying accurate gradients of seismic wave reflection coefficients (SWRC) to the inversion of seismic wave velocities

作     者：LIU FuPing MENG XianJun XIAO JiaQi WANG YuMei SHEN GuoQiang 

作者机构：Beijing Institute of Graphic CommunicationBeijing 102600China Shengli Geophysical Research Institute of SINOPECDongying 257022China Greatwall Drilling Company ofCNPCBeijing 100101China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2012年第55卷第12期

页      面：1953-1960页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 070801[理学-固体地球物理学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0708[理学-地球物理学] 

基　　金：supported by Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality(PHR(IHLB))(Grant No.PHR201107145) 

主　　题：Zoeppritz’s partial derivative equations inversion of seismic wave velocity grads of seismic wave reflection coefficients (SWRCs) multi-angle inversion 

摘      要：Through solving the Zoeppritz s partial derivative equations, we have obtained accurate partial derivatives of reflected coefficients of seismic wave with respect to Pand S-wave *** those partial derivatives, a multi-angle inversion is developed for seismic wave *** examples of different formation models show that if the number of iterations goes over 10, the relative error of inversion results is less than 1%, whether or not there is interference among the reflection *** we only have the reflected seismograms of P-wave, and only invert for velocities of P-wave, the multi-angle inversion is able to obtain a high computation *** we have the reflected seismograms of both P-wave and VS-wave, and simultaneously invert for the velocities of P-wave and VS-wave, the computation precisions of VS-wave velocities improves gradually with the increase of the number of angles, but the computation precision of P-wave velocities becomes *** matter whether the reflected seismic waves from the different reflection interface are coherent or non-coherent, this method is able to achieve a higher computation *** it is based on the accurate solution of the gradient of SWRCs without any additional restriction, the multi-angle inversion method can be applied to seismic inversion of total *** removing the difficulties caused by simplified Zoeppritz formulas that the conventional AVO technology struggles with, the multiangle inversion method extended the application range of AVO technology and improved the computation precision and speed of inversion of seismic wave velocities.