石油科学通报2025，Vol.10Issue(4)：666-680,15.DOI:10.3969/j.issn.2096-1693.2025.01.018
一种基于叠后-叠前联合反演的储层表征方法
A seismic reservoir characterization method based on post and pre-stack joint inversion
摘要
Abstract
Seismic petrophysical inversion is an effective method for reservoir physical property evaluation.Direct prediction of reservoir parameters from seismic data has lower uncertainty and higher accuracy than estimation of reservoir parameters from seis-mic elastic parameters.However,at present,there is little discussion on the establishment of initial model in direct reservoir param-eter inversion.A reasonable initial model can not only improve the accuracy of inversion results but also reduce the calculation cost of inversion process.To solve this problem,this paper proposes a seismic reservoir characterization method based on pre-stack and post-stack joint inversion,which combines post-stack impedance inversion and statistical rock physical model to provide a reliable initial model for pre-stack seismic rock physical inversion,and makes full use of the high signal-to-noise ratio of post-stack seismic data and the high resolution of pre-stack seismic data to improve the stability and accuracy of reservoir parameter inversion.Firstly,the critical porosity model is calibrated based on the existing logging data,and the reservoir parametric reflection coefficient formula is constructed based on Zoeppritz reflection coefficient equation,which establishes the direct relationship between seismic data and reservoir physical properties.Then the P-wave impedance is obtained by post-stack inversion,and the initial model of reservoir physical parameter inversion is obtained by using the statistical petrophysical model obtained from logging data.Finally,based on Bayesian framework and Cauchy prior constraints,the inversion of physical property parameters such as porosity,shale content and water saturation from pre-stack seismic data is realized.The synthetic tests show that the superior anti-noise performance of post-stack impedance can provide a reliable initial model for reservoir parameter prediction,and can significantly improve the accuracy of physical property inversion.The field data test verifies the advantages of this method in improving inversion accuracy and enhancing lateral continuity in direct estimation of reservoir physical properties.关键词
叠后-叠前联合反演/地震岩石物理反演/地震储层表征/贝叶斯框架/初始模型Key words
combination of post and pre-stack seismic inversion/petrophysical inversion/seismic reservoir characterization/Bayesian framework/initial model分类
天文与地球科学引用本文复制引用
苗发维,贺艳晓,唐征新,依圣博,倪京阳..一种基于叠后-叠前联合反演的储层表征方法[J].石油科学通报,2025,10(4):666-680,15.基金项目
国家自然科学基金项目(42374129,U24B6001) （42374129,U24B6001）
中国石油天然气集团有限公司科技管理部资助项目(物探应用基础实验和前沿理论方法研究2022DQ0604-01) （物探应用基础实验和前沿理论方法研究2022DQ0604-01）
中国石油大学(北京)科研基金项目(2462024PTJS007) （北京）
教育部复杂油气藏勘探开发工程研究中心开放课题基金项目(ZX20240163)联合资助 （ZX20240163）
