大庆石油地质与开发2025，Vol.44Issue(4)：42-50,9.DOI:10.19597/J.ISSN.1000-3754.202402002
四川盆地平昌地区凉高山组页岩油气富集条件及有利区预测
Oil and gas enrichment conditions and favorable areas prediction of Liang-gaoshan Formation shale in Pingchang area of Sichuan Basin
摘要
Abstract
Continental shale of mid-Jurassic Lianggaoshan Formation in Pingchang area is one of the important fields for shale oil and gas exploration in Sichuan Basin.Hydrocarbon generation potential of Lianggaoshan Forma-tion shale is clarified through organic geochemical methods of rock pyrolysis and organic petrology.Reservoir quali-ty of Lianggaoshan Formation shale is determined by integrating reservoir property and oil and gas bearing property,pore types and microstructure,hydrocarbon mobility characterization,brittle mineral content and fracability charac-teristics.On this basis,favorable areas for shale oil exploration in Lianggaoshan Formation of Pingchang area are se-lected.The results show that Lianggaoshan Formation in Pingchang area develops shallow-deep lacustrine facies or-ganic-rich mud shale.Deep-lacustrine facies mud shale is mainly developed in 1-1 reservoir member in upper Liang-gaoshan Formation,with characteristics of large thickness,moderate organic matter abundance,good organic mat-ter type,high maturity,large hydrocarbon generation potential and high oil-gas conversion rate.Mud shale reser-voir develops lamellar fractures and reticular fractures,with good physical property.Pore type is dominated by inor-ganic pores,most of which are medium pores and large pores,with good oil and gas bearing property,making it the best geological sweet spot layer.Sandstone-shale interbeds in 1-2 reservoir member in upper Lianggaoshan Forma-tion have high content of brittle minerals,good fracability and good oil-bearing property due to being adjacent to 1-1 reservoir member in upper Lianggaoshan Formation,making it a good engineering sweet spot layer.Sand-shale as-semblage interval of 1st sub-member in upper Lianggaoshan Formation has stable material condition for in-situ en-richment of condensate oil-light oil,with large resource potential and good prospect for shale oil exploration.关键词
页岩油/烃源岩/页岩储层/侏罗系/凉高山组/平昌地区/四川盆地Key words
shale oil/source rock/shale reservoir/Jurassic system/Lianggaoshan Formation/Pingchang area/Sichuan Basin分类
能源科技引用本文复制引用
汪海燕,邱彤,王志国,董忠良,王继平,黄科翔..四川盆地平昌地区凉高山组页岩油气富集条件及有利区预测[J].大庆石油地质与开发,2025,44(4):42-50,9.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）
