石油地球物理勘探2024，Vol.59Issue(4)：828-836,9.DOI:10.13810/j.cnki.issn.1000-7210.2024.04.020
自适应时窗多道相关的叠后地震波阻抗反演方法
Post-stack seismic impedance inversion method with multi-channel correlation under adaptive window
摘要
Abstract
At present,the main way to improve the lateral continuity of inversion is still the regularization method based on the assumption of prior information of model parameters.When the prior information contra-dicts the actual situation,the regularization method will have problems.Therefore,based on the theory and method of multi-channel inversion,a post-stack seismic impedance inversion method with multi-channel correla-tion under an adaptive window is proposed.Firstly,using the idea of active learning,the position of key fea-tures of seismic data is screened by querying the original seismic data.Secondly,the seismic data are divided into time windows of different scales according to the above locations,which is helpful for fault information pro-tection and abnormal body boundary identification.Thirdly,the correlation between seismic traces in the adap-tive window is calculated according to the dot multiplication.Finally,the"weighted sum"seismic trace is used to obtain the reconstructed seismic trace,which is the constraint condition of the inversion objective function.With the help of the idea of active learning and local correlation of seismic data,the proposed method can better reflect the correlation between multiple channels in the adaptive window and can be processed in pa-rallel.The model test and the field data test show that the proposed method has good lateral continuity of inversion results,and can take into account the special structural information.However,the computational efficiency is low,and there are some limitations in the shallow and deep areas with large speed differences,making the proposed method suitable for narrow areas with special structures.关键词
自适应时窗/多道相关/横向连续性/相关性/地震波阻抗反演Key words
adaptive window/multi-channel correlation/lateral continuity/correlation/seismic impedance inversion分类
天文与地球科学引用本文复制引用
彭真,许辉群,张伟..自适应时窗多道相关的叠后地震波阻抗反演方法[J].石油地球物理勘探,2024,59(4):828-836,9.基金项目
本项研究受中国石油天然气股份有限公司勘探开发研究院地球物理重点实验室开放基金资助课题"考虑标签与网络适应性的高分辨率地震波阻抗反演技术"(2022-KFKT-25)资助. （2022-KFKT-25）
