海相油气地质2025，Vol.30Issue(6)：613-624,12.DOI:10.3969/j.issn.1672-9854.2025.06.007
碎屑岩储层非线性频变反演与含气砂岩预测方法研究
Research on nonlinear frequency dependent inversion of clastic rock reservoirs and prediction methods of gas-bearing sandstones
摘要
Abstract
Frequency-dependent AVO inversion based on viscoelastic theory is an effective method that uses dispersion characteristics to guide fluid identification.The formation quality factors obtained by inversion have certain effects in the fluid detection of clastic rock reservoirs.However,at present,most of the inversion methods for quality factors are linear inversions based on linear reflection coefficient approximation equations.Moreover,the nonlinear inversion method based on the highly accurate and less assumption-based exact Zoeppritz equation fails to provide stable solutions,and has low computational efficiency,which restricts its large-scale application ability in three-dimensional work areas.To address the above issues,based on Bortfeld's nonlinear approximation,this study derived the nonlinear reflection coefficient equation considering seismic frequency.While ensuring the accuracy of the equation,it reduce its complexity.On this basis,a new pre-stack nonlinear two-step frequency-dependent inversion method is developed to predict the quality factor of the stratum,and reasonable and effective fluid identification results are obtained.It provides a strong basis for the prediction of gas-bearing clastic rock reservoirs.The applicability of this method in reservoir containment assessment is verified by the synthetic record tests and actual work area applications.关键词
碎屑岩储层/黏弹性介质/非线性频变反演/品质因子/流体识别Key words
clastic rock reservoir/viscoelastic medium/nonlinear frequency-dependent inversion/quality factor/fluid identification分类
能源科技引用本文复制引用
阴国锋,吕鹏,朱振鑫,曾勇坚,孙进,张奎..碎屑岩储层非线性频变反演与含气砂岩预测方法研究[J].海相油气地质,2025,30(6):613-624,12.基金项目
本文受中国石油化工股份有限公司课题"孔雀亭东部低带深层地震资料目标处理"(编号:34000000-24-ZC0613-0064)资助 （编号:34000000-24-ZC0613-0064）
