荆门探区深层页岩储层孔喉特征  

Pore throat characteristics of deep shale reservoir in Jingmen exploration area

作　　者：陈宇杰 李小明[1] 吝文[2] 马丽红 刘德勋[2] 柳吉荣 CHEN Yujie;LI Xiaoming;LIN Wen;MA Lihong;LIU Dexun;LIU Jirong(North China Institute of Science and Technology,Yanjiao,065201,China;Department of Shale Gas,Research Institute of Petroleum Exploration and Development,Beijing,100083,China)

机构地区：[1]华北科技学院,北京东燕郊065201 [2]中国石油勘探开发研究院页岩气研究所,北京100083

出　　处：《华北科技学院学报》2021年第3期45-54,共10页Journal of North China Institute of Science and Technology

基　　金：国家油气重大专项“四川盆地及周缘页岩气形成富集条件、选区平均技术及应用”(2017ZX05035);国家重大专项“昭通页岩气勘探开发示范工程”(ZX05063);中国石油天然气有限公司重点项目“非常规油气勘探开发关键技术研究”(2017B49)。

摘　　要：深层页岩气是页岩气勘探开发的重要接替领域,页岩气储层研究是页岩气勘探与开发的理论基础。为深入认识荆门深层页岩气储层孔喉特征,选取YT1井五峰组-龙马溪组一段页岩为研究对象,采用氩离子抛光、聚焦离子束扫描电镜和CO_(2)-N_(2)联测孔径的方法,获得微孔、介孔和宏孔的页岩全孔径表征,明确深层页岩孔喉特征及主控因素。结果表明:研究区五峰组-龙马溪组页岩孔径以微孔为主,中孔和宏孔所占比例较少,有机孔为主要发育孔隙类型;孔径分布形态呈分散型,具有两个主峰:分别在0.4~0.7 nm和1~2 nm之间。有机碳含量(TOC)与石英含量是影响荆门探区五峰-龙马溪组页岩孔隙发育的关键因素,分别决定了微孔和大介孔的孔隙体积与比表面积。研究结果可为荆门探区深层页岩气合理开发提供依据。deep shale gas is an important succeeding field of shale gas exploration and development,and shale gas reservoir research is the theoretical basis of shale gas exploration and development.In order to deeply understand the pore throat characteristics of Jingmen deep shale gas reservoir,the shale from Wufeng Formation to Longmaxi formation of well YT1 was selected as the research object.The full pore size characterization of microporous,mesoporous and macroporous shale was obtained by means of argon ion polishing,focused ion beam scanning electron microscopy and CO_(2)-N_(2) joint pore size measurement,and the pore throat characteristics and main controlling factors of deep shale were determined.The results show that the pore size of Wufeng Longmaxi shale in the study area is mainly micropore,and the proportion of mesopore and macropore is less,and the organic pore is the main pore type;The pore size distribution is dispersive and has two main peaks:0.4-0.7 nm and 1-2 nm,respectively.total organic carbon(TOC)and quartz content are the key factors affecting the pore development of Wufeng Longmaxi formation shale in Jingmen exploration area,which determine the pore volume and specific surface area of micropores and macropores respectively.The research results can provide a basis for the rational development of deep shale gas in Jingmen exploration area.

关 键 词：荆门探区 深层页岩 孔喉特征 全孔径 主控因素 

分 类 号：TE135[石油与天然气工程—油气勘探]