叠前地震资料AVA变参数反演方法  

AVA inversion using replacing parameters method for pre-stack seismic data

作　　者：代荣获 张繁昌[1] 刘汉卿 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,青岛266580

出　　处：《地球物理学进展》2015年第1期261-266,共6页Progress in Geophysics

基　　金：国家重点基础研究发展计划(2013CB228604)资助

摘　　要：线性AVA反演将纵横波速度比作为常数,从而把非线性AVA反演问题线性化,以得到稳定的反演结果.为突破这一假设条件对AVA反演的限制,本文把纵横波速度比作为未知量,通过变换反演参数,将非线性AVA反演问题线性化,再利用广义线性反演方法求解,得到合理稳定的储层参数.利用实际工区井数据考察了方法的可行性和抗噪性.最后,将该方法应用到实际地震数据,得到了合理的反演结果,说明本反演方法的可靠性与适用性.Linear AVA inversion method takes the ratio of Swave velocity to P-wave velocity as a constant to linearize the nonlinear AVA problem through to obtain a stable inversion result.In order to break the limits caused by this assumption in AVA inversion applications,we regard the velocity ratio as an unknown quantity,and linearize the nonlinear AVA inverse problem through replacing the inversion parameters.Then,we use the generalized linear inversion method to solve the inverse problem and obtain a reasonable and stable reservoir parameter.We investigate the feasibility and noise immunity using the well data from actual survey.Finally,the method is applied to real seismic data and the inversion results are reasonable.

关 键 词：AVA反演 变参数 线性化 储层参数 广义线性反演 

分 类 号：P631[天文地球—地质矿产勘探]