大庆石油地质与开发2025，Vol.44Issue(2)：1-10,10.DOI:10.19597/J.ISSN.1000-3754.202309043
川东北地区侏罗系页岩油储层地质特征及资源潜力
Geologic characteristics and resource potential of Jurassic shale oil reservoirs in northeastern Sichuan
摘要
Abstract
Regarding the issues of reservoir heterogeneity and unclear potential of resources in Jurassic Liang-gaoshan Formation shale oil in northeastern Sichuan,"4 properties"characteristics such as lithology and properties are clarified based on core experiments data analysis,and resource potential of Jurassic shale oil in northeastern Sichuan is determined via volumetric method.The results show that the shale of Lianggaoshan Formation exhibits high quartz content characteristics,and the lithology is mostly laminated felsic shale with siliceous laminae devel-oped.Lithological assemblage of shale strata series in Da'anzhai and Dongyuemiao members of Ziliujing Formation is similar,dominated by limestone-shale interbedding,and the lithology is mostly laminated mixed shale with cal-careous laminae developed.Average porosity of the 3 sets of shale reservoirs is 4%～9%,and reservoir space types mainly include siliceous intergranular pores,clay intercrystaline pores,pyrite intercrystaline pores,organic matter-hosted pores and lamellation fractures.Evaluation of"seven properties"relationship determines that the bottom of 1st sub-member in upper member of Lianggaoshan Formation,the bottom of 2nd sub-member in upper member of Lianggaoshan Formation and the top of 3rd sub-member in upper member of Lianggaoshan Formation are optimal sweet spots of Lianggaoshan Formation,while the middle part of Da'anzhai Member and the top of Dongyuemiao Member are optimal sweet spots of Ziliujing Formation.Finally,the resource potential evaluation of the 3 shale stra-ta series via volumetric method determines that Yilong-Dazhu area is a favorable play for further exploration of conti-nental shale oil and gas of Jurassic in Sichuan Basin.The research provides foundation for increasing reserves and production of shale oil in Lianggaoshan Formation.关键词
川东北地区/侏罗系/页岩油/富集特征/资源潜力Key words
northeastern Sichuan/Jurassic/shale oil/enrichment characteristics/resource potential分类
石油、天然气工程引用本文复制引用
王显东,王志国,成德安,马威奇,安测,曾宏斌,徐亮..川东北地区侏罗系页岩油储层地质特征及资源潜力[J].大庆石油地质与开发,2025,44(2):1-10,10.基金项目
中国石油天然气股份有限公司科学研究与技术开发项目"四川盆地大庆探区侏罗系陆相页岩油富集机理与关键评价技术研究"(2022DJ1809). （2022DJ1809）
