苏北盆地高邮凹陷阜二段页岩储集空间类型及孔喉结构特征  

Shale reservoir pore types and pore throat structure characteristics of the second member of Funing Formation in Gaoyou Sag,Subei Basin

作　　者：朱相羽 段宏亮[1] 李鹏 刘忠宝[2,3] 仇永峰 ZHU Xiangyu;DUAN Hongliang;LI Peng;LIU Zhongbao;QIU Yongfeng(Sinopec Jiangsu Oilfield Company,Yangzhou 225009,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,Beijing 102206,China;Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production,Beijing 102206,China)

机构地区：[1]中国石化江苏油田分公司,江苏扬州225009 [2]页岩油气富集机理与高效开发全国重点实验室,北京102206 [3]中国石化页岩油气勘探开发重点实验室,北京102206

出　　处：《复杂油气藏》2023年第1期1-6,共6页Complex Hydrocarbon Reservoirs

基　　金：中国石化科技开发部项目(编号:P21113),江苏省卓越博士后计划。

摘　　要：为揭示陆相页岩油孔隙结构发育特征,以苏北盆地高邮凹陷阜二段页岩为例,采用氩离子抛光-扫描电镜、氮气吸附和高压压汞等多种测试方法,分析了孔隙类型及孔喉结构特征。结果表明:高邮凹陷阜二段页岩孔隙类型主要以无机矿物质孔为主,其次为有机质孔,无机矿物质孔隙以黏土矿物间孔和碳酸盐岩粒内溶蚀孔为主,有机质孔隙为镜质体内有机质孔、有机黏土复合体内有机质孔和固体沥青内有机质孔。阜二段页岩以介孔为主,平均占比达72.87%,是提供吸附场所的主要介质,喉道以纳米级孔喉为主,页岩的有机-无机物质组成是控制孔喉结构的关键因素。In order to reveal the characteristics of pore structure development of lacustrine shale oil,taking the shale of the second member of Funing Formation in Gaoyou Sag,Subei Basin as an example,various testing methods such as argon ion polishing-scanning electron microscopy,nitrogen adsorption,and high pressure mercury intrusion were used to analyze the pore type and pore throat structure characteristics.The results show that the pore types of shale in the second member of Funing Formation of Gaoyou Sag are mainly inorganic mineral pores,followed by organic matter pores.The inorganic mineral pores are mainly clay mineral interpores and carbonate intragranular corrosion pores.The organic matter pores are organic matter pores in vitrinite,organic matter pores in organic clay complexes,and organic matter pores in solid asphalt.The shale in the second member of Funing Formation is mainly mesoporous,accounting for 72.87%on average.It is the main medium for providing adsorption sites.The throat is mainly composed of nanoscale pores and throats.The organic-inorganic composition of the shale is a key factor in controlling the pore throat structure.

关 键 词：页岩储层 孔喉结构 阜二段 苏北盆地 

分 类 号：P618.13[天文地球—矿床学]