石油地球物理勘探2025，Vol.60Issue(3)：761-774,14.DOI:10.13810/j.cnki.issn.1000-7210.20240195
应用互相关目标函数和贝叶斯理论的纵波和转换波联合AVO反演方法
Joint AVO inversion method of PP-and PS-wave based on cross-correlation objective function and Bayesian theory
摘要
Abstract
The joint AVO inversion objective function of PP- and PS-wave is usually constructed based on the L2 norm,and its effect is greatly affected by the signal-to-noise ratio(SNR)of seismic data.In this paper,a joint AVO inversion method of PP- and PS-wave is proposed.Based on the Bayesian theory,this method com-bines PP- and PS-wave seismic data,and constructs an objective function based on normalized zero-delay cross-correlation algorithm for inversion.The combination of PP- and PS-wave seismic data can enhance the stability of the inversion algorithm.The strategy of normalizing seismic data and the cross-correlation objective function can enhance the noise immunity of the inversion algorithm.Therefore,the method in this paper can provide the P-wave velocity,S-wave velocity and density parameters with high accuracy using the seismic data with lower SNR.The test results of model data whose SNRs are 7 dB and 1 dB respectively and actual data show that the proposed method can achieve high-accuracy inversion results by seismic data with lower SNR.Compared with the joint inversion using the objective function based on the L2 norm,the results show that the proposed method has smaller error and more robust anti-noise performance.关键词
纵波和转换波/联合反演/AVO反演/归一化零延迟互相关目标函数/贝叶斯理论Key words
PP-wave and PS-wave/joint inversion/AVO inversion/normalized zero-delay cross-correlation ob-jective function/Bayesian theory分类
天文与地球科学引用本文复制引用
董子龙,刘洋,孙宇航,田文彬,邸希..应用互相关目标函数和贝叶斯理论的纵波和转换波联合AVO反演方法[J].石油地球物理勘探,2025,60(3):761-774,14.基金项目
本项研究受中石化科技攻关项目"涠西OBN多分量地震资料处理技术"(P23098)资助. （P23098）
