大庆石油地质与开发2025，Vol.44Issue(2)：38-49,12.DOI:10.19597/J.ISSN.1000-3754.202309025
川东北地区侏罗系凉高山组页岩储层地质特征及页岩油气勘探潜力
Geological characteristics of shale reservoirs and exploration potential of shale oil and gas in Jurassic Lianggaoshan Formation of northeastern Sichuan Basin
摘要
Abstract
Mineral composition of shale reservoirs in Lianggaoshan Formation of northeastern Sichuan Basin is com-plex.Clarifying basic geological characteristics of organic geochemistry and mineral composition is conductive to evaluate shale oil sweet spots and to optimize favorable areas.Shale reservoir samples from Lianggaoshan Formation are selected to reveal basic geological characteristics including mineral composition,microscopic pore structure,oil-bearing property and fluidity of shale reservoirs by experimental methods of whole rock XRD,FE-SEM,low-temperature nitrogen adsorption,high-pressure mercury injection,NMR and CLSM,and to analyze shale oil explo-ration potential.The results show that Lianggaoshan Formation shale in northeastern Sichuan Basin is mainly com-posed of quartz and clay minerals,with good source rock quality and geological basis for high production.Reservoir space is dominated by intergranular pores,intraranular pores and organic matter-hosted pores.Oil in shale is en-riched clusteredly in felsic-intergranular pores,linearly along lamellation fractures and scatteredly in matrix pores,with obvious separation between light components and heavy components.NMR centrifugation calculated movable oil content of Lianggaoshan Formation is 0.80～3.26 mg/g and movable oil rate is 13%～24%.Lianggaoshan Forma-tion shale has good organic geochemical property,excellent microscopic pore structure,high proportion of siliceous minerals and high brittleness index,which is conducive to stimulation.Estimated shale oil resource is 26.75×108 t and shale gas resource is 1.72×1012 m3 in Lianggaoshan Formation,indicating enormous resource potential.The re-search provides theoretical guidance and technical support for exploration and development of lacustrine shale oil in Lianggaoshan Formation in Sichuan Basin.关键词
页岩储层/页岩油/含油性/地质特征/四川盆地/凉高山组Key words
shale reservoir/shale oil/oil-bearing property/geological characteristics/Sichuan Basin/Liang-gaoshan Formation分类
石油、天然气工程引用本文复制引用
张金旭,王有智,陈绪强,祝斯淼,朱彦平..川东北地区侏罗系凉高山组页岩储层地质特征及页岩油气勘探潜力[J].大庆石油地质与开发,2025,44(2):38-49,12.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）
黑龙江省"百千万"工程科技重大专项"松辽盆地北部古龙页岩油成藏条件及甜点分布规律研究"(SC2020ZX05A0023). （SC2020ZX05A0023）
