[an error occurred while processing this directive] 世界地质 2019, 38(4) 999-1011 DOI:   10.3969/j.issn.1004-5589.2019.04.011  ISSN: 1004-5589 CN: 22-1111/P
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有机质孔隙
有机黏土复合体
页岩气储层
下寒武统
上扬子地区
本文作者相关文章
刘忠宝
边瑞康
高波
王鹏威
王濡岳
金治光
杜伟
PubMed
Article by Liu Z
Article by Bian R
Article by Gao B
Article by Wang P
Article by Wang R
Article by Jin Z
Article by Du W
上扬子地区下寒武统页岩有机质孔隙类型及发育特征
刘忠宝1,2, 边瑞康2, 高波2, 王鹏威2, 王濡岳2, 金治光3, 杜伟2
1. 页岩油气富集机理与有效开发国家重点实验室, 北京 100083;
2. 中国石油化工股份有限公司 石油勘探开发研究院, 北京 100083;
3. 中国石油大学(北京)地球科学学院, 北京 102249
摘要： 为揭示古老层系过成熟页岩有机质孔隙的发育特征，以上扬子地区下寒武统页岩为例，采用岩石薄片、有机岩石学、有机地球化学、氩离子抛光-扫描电镜等多种技术方法，重点从有机质组成及有机质的赋存方式的角度，开展了有机质孔隙类型的识别，分析了各类孔隙的发育特征及形成机制。研究结果表明：下寒武统页岩主要发育3种有机质孔隙类型：固体沥青内有机质孔隙、有机质-无机矿物复合体内有机质孔隙及莓状黄铁矿集合体内有机质孔隙；页岩固体沥青内有机质孔隙普遍较发育，但孔径小（<30 nm），页岩中天然气大量散失是导致有机质孔隙坍塌萎缩变小的主要原因；有机黏土复合体和莓状黄铁矿集合体形成的稳定抗压结构，有利于有机质孔隙及页岩气的保存。
关键词： 有机质孔隙   有机黏土复合体   页岩气储层   下寒武统   上扬子地区  
Organic matter pore types and development characteristics of Lower Cambrian shale in Upper Yangtze area
LIU Zhong-bao1,2, BIAN Rui-kang2, GAO Bo2, WANG Peng-wei2, WANG Ru-yue2, JIN Zhi-guang3, DU Wei2
1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China;
2. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;
3. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China
Abstract: To reveal the organic matter pore development characteristics of the over-mature shale in the old strata, organic matter pores identification, development characteristics and forming mechanism of pores of Lower Cambrian shale in Upper Yangtze area were studied based on organic components and occurrence manner through thin-sections, organic petrology, organic geochemistry and Ar ion milling/SEM technologies. Results show that or-ganic matter pores in the Lower Cambrian shale consist of three types, i. e., organic matter pores in the solid bitu-men, in the organic matter-inorganic mineral complex and in the strawberry pyrite assemblage. Organic matter pores in the solid bitumen widely occurred but with small pore diameter (<30 nm), and the expulsion of massive gas was responsible for the collapse and shrinkage of organic matter pores. Organic matter-clay complex and straw-berry pyrite assemblage can form stable anti-compression structures, which are favorable for the preservation of or-ganic matter pores and shale gas in them.
Keywords: organic matter pores   organic matter-clay complex   Lower Cambrian   Upper Yangtze area  
收稿日期 2019-06-12 修回日期 2019-10-10 网络版发布日期  
DOI: 10.3969/j.issn.1004-5589.2019.04.011
基金项目:

国家自然科学基金项目（41872124）、中国石化科技部项目（P15114）与国家科技重大专项（2017ZX05036002001）联合资助。

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