石油物探2026，Vol.65Issue(5)：809-820,12.DOI:10.12431/issn.1000-1441.2025.0333
地震-地质联合断层封堵性评价方法及勘探实践
A seismic-geological approach for fault sealing evaluation:Exploration practice in Kongdian Formation,southern slope of Dongying sag,Jiyang Depression
摘要
Abstract
Fault sealing evaluation is a critical component in the exploration of complex structural reservoirs,where quantitative methods based on 3D seismic data represent a key research focus for reservoir evaluation and drilling deployment in well-sparse areas or early exploration stages.This study proposes an integrated approach for fault sealing evaluation by incorporating geological principles and 3D seismic data.Results indicate that the lithologic configuration of fault walls,shale gouge ratio(SGR),and fault plane dip are the primary controls on sealing capacity.Seismic data analysis and forward modeling reveal significant attribute discrepancies(e.g.,amplitude variation rate and frequency anomaly)across fault planes with good sealing performance.By establishing a multivariate regression model that links seismic attribute discrepancy indices,SGR,and fault plane dip to discovered hydrocarbon accumulations,we develop a quantitative characterization method for fault sealing capacity based on seismic attribute variations.This method enables effective evaluation of fault sealing in well-sparse regions.Its application in the Dongying sag of the Jiyang Depression successfully identifies 12 sealing faults,guides the deployment of 8 exploration wells,and achieves an 85%penetration ratio of oil layers,providing robust support for target optimization during early-stage exploration.关键词
断层封堵性/三维地震/地震属性差异/少井区评价/东营凹陷Key words
fault sealing evaluation/3D seismic data/seismic attribute discrepancy/well-sparse area evaluation/Dongying sag分类
能源科技引用本文复制引用
张伟忠,曲志鹏,李博,向雪梅,邹少峰,于正军,张天骄,纪利祥..地震-地质联合断层封堵性评价方法及勘探实践[J].石油物探,2026,65(5):809-820,12.基金项目
国家油气重大科技专项(2024ZD1400100)和中石化科技攻关项目(P25104)共同资助. This research is financially supported by the National Major Science and Technology Project for Oil and Gas(Grant No.2024ZD1400100)and the Sinopec Science and Technology Project(Grant No.P25104). （2024ZD1400100）
