大庆石油地质与开发2025，Vol.44Issue(4)：20-30,11.DOI:10.19597/J.ISSN.1000-3754.202403022
辽河坳陷东部凹陷中南部古生界潜山油气藏储层特征及成藏条件
Reservoir characteristics and hydrocarbon accumulation conditions of Paleozoic buried hill in central-southern part of eastern sag in Liaohe Depression
摘要
Abstract
Large-scale multi-layers buried-hill oil and gas reservoirs develop in central-southern part of eastern sag in Liaohe Depression with good oil and gas shows.In order to study reservoir characteristics of Paleozoic buried hill with different lithologies in different eras and hydrocarbon accumulation conditions,based on large amount of data from drilling in work area,wells in adjacent areas and seismic sections,by using core and thin section observation,porosity and permeability measurement,mercury injection experiment and seismic interpretation,Paleozoic buried-hill reservoirs are evaluated in depth from various perspectives of reservoir rock pore types,permeability and pore-throats,and the main controlling factors and accumulation patterns are discussed by using seismic sections.The re-sults show that oil in buried hill originates from Paleogene source rock in eastern sag.Reservoir bodies include bur-ied-hill high-quality weathering crust reservoirs and inner buried-hill reservoirs,with well-developed fractures.Pa-leozoic reservoir types include Lower Paleozoic carbonate reservoirs and Upper Paleozoic carbonate-clastic reser-voirs,providing favourable sites for hydrocarbon accumulation.Hydrocarbon accumulation patterns include young source and old reservoir-fault and unconformity migration-buried hill structural traps.The main controlling factors of reservoir accumulation include faults,structural traps,spatio-temporal configuration of source-reservoir-seal and fractures development degree.The research provides basis for further oil and gas exploration deployment in Liaohe Oilfield,and also provides new idea for evaluating hydrocarbon accumulation in multi-layers buried hill.关键词
多层系潜山/风化壳储层/裂缝/压汞曲线/成藏条件/辽河坳陷/东部凹陷Key words
multi-layers buried hill/weathering crust reservoir/fracture/mercury injection curve/accumulation conditions/Liaohe Depression/eastern sag分类
能源科技引用本文复制引用
杨光达,杜庆国,陈彦,张东伟,刘海涛,周艳,汪百齐,翁文胜,王伟成,郭军敏..辽河坳陷东部凹陷中南部古生界潜山油气藏储层特征及成藏条件[J].大庆石油地质与开发,2025,44(4):20-30,11.基金项目
国家重点研发专项子课题"中国东部新生代陆相湖盆有机碳转化及油气富集与分布"(2023YFF0804303) （2023YFF0804303）
辽河油田公司重大专项"辽河坳陷深层天然气成藏机理与勘探战略研究"(2021KJZX-02). （2021KJZX-02）
