杨光达,陈彦,张东伟,刘海涛,周艳,汪百齐,翁文胜,王伟成,郭军敏,杜庆国
YANG Guangda,CHEN Yan,ZHANG Dongwei,LIU Haitao,ZHOU Yan,WANG Baiqi,WENG Wensheng,WANG Weicheng,GUO Junmin,DU Qingguo

• 1:中国石油辽河油田分公司勘探开发研究院
• 2:中国石油勘探开发研究院

摘要(Abstract)：

辽河坳陷东部凹陷中南部发育大规模的多层系潜山油气藏，且油气显示较好。为探究古生界不同时代不同岩性的潜山储层特征及油气成藏条件，基于大量工区钻井、邻区井及地震剖面数据，利用岩心、薄片观察、孔渗测定、压汞实验及地震解释方法，从储层岩石孔隙类型、渗透率及孔喉等多角度对古生界潜山储层进行了深入研究，并利用地震剖面探讨其成藏主控因素及成藏模式。结果表明：潜山原油来源于东部凹陷的古近系烃源岩；储集体为潜山优质风化壳储层及潜山内幕储层，裂缝较为发育；古生界储层类型包括下古生界碳酸盐岩储层和上古生界碳酸盐岩―碎屑岩2种储层，为油气聚集提供了良好的场所；油气成藏过程为新生古储―断层、不整合面运移―潜山构造圈闭聚集成藏模式；成藏主要控制因素包括断层、构造圈闭、生储盖时空配置、裂缝发育程度。研究成果为辽河油田下一步油气勘探部署提供依据，同时为多层系潜山油气成藏评价提供了新思路。
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 buriedhill reservoirs are evaluated in depth from various perspectives of reservoir rock pore types, permeability and porethroats, and the main controlling factors and accumulation patterns are discussed by using seismic sections. The results show that oil in buried hill originates from Paleogene source rock in eastern sag. Reservoir bodies include buried-hill high-quality weathering crust reservoirs and inner buried-hill reservoirs, with well-developed fractures. Paleozoic reservoir types include Lower Paleozoic carbonate reservoirs and Upper Paleozoic carbonate-clastic reservoirs, 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(KeyWords)： 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
multi-layers buried hill;weathering crust reservoir;fracture;mercury injection curve;accumulation conditions;Liaohe Depression;eastern sag

Abstract:

Keywords:

基金项目(Foundation): 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）;; 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）

作者(Author): 杨光达,陈彦,张东伟,刘海涛,周艳,汪百齐,翁文胜,王伟成,郭军敏,杜庆国
YANG Guangda,CHEN Yan,ZHANG Dongwei,LIU Haitao,ZHOU Yan,WANG Baiqi,WENG Wensheng,WANG Weicheng,GUO Junmin,DU Qingguo

DOI: 10.19597/J.ISSN.1000-3754.202403022

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