Pore Structure Characteristics of Taiyuan Formation Shale in Qinshui Basin

Hongyue Duan; Wenkai Zhang; Xinquan Wang; Kaizi Jiang; Tingting Huang

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Pore Structure Characteristics of Taiyuan Formation Shale in Qinshui Basin

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摘要

Qinshui Basin is located in the southeast of Shanxi Province, China. Taking the shale of Taiyuan Formation in Qinshui Basin as the research object, the study analyzed the pore size of the shale of Taiyuan formation in detail from micropore to macropore by the methods of mercury injection, liquid nitrogen analysis and combination of liquid nitrogen and mercury injection. The results show that: 1) the visible pores and macropores are poorly developed and distributed unevenly in the shale of Taiyuan formation, and the micropores are well developed in the shale, and there are more open pores in the pore diameter range, and the pore connectivity is good;2) the liquid nitrogen experiment shows that the pores of Taiyuan Shale are relatively developed between 15 nm and 20 nm, and the formation of hysteresis loop may be caused by some narrow slit pores with similar layered structure;3) the comprehensive analysis of liquid nitrogen and mercury injection experiments shows that the shale of the Taiyuan formation mainly develops micropores, the Mesopores is not developed, the pore volume at 10 - 100 nm is more developed than other parts, and the specific surface is mainly contributed by micropores, which can improve the efficiency of shale gas resolution;at the same time, it provides a channel for Shale gas migration, which is beneficial to the development of shale gas.

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《地球科学和环境保护期刊（英文）》 |2020年第7期|P.126-146|共21页
作者
Hongyue Duan; Wenkai Zhang; Xinquan Wang; Kaizi Jiang; Tingting Huang;
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作者单位

School of Resources and Geosciences China University of Mining and Technology Xuzhou ChinaShanxi Key Laboratory of Resources Environment and Disaster Monitoring Shanxi Coal Geology Geophysical Surveying Exploration Institute Jinzhong China;

Shanxi Key Laboratory of Resources Environment and Disaster Monitoring Shanxi Coal Geology Geophysical Surveying Exploration Institute Jinzhong China;

Shanxi Key Laboratory of Resources Environment and Disaster Monitoring Shanxi Coal Geology Geophysical Surveying Exploration Institute Jinzhong China;

Shanxi Key Laboratory of Resources Environment and Disaster Monitoring Shanxi Coal Geology Geophysical Surveying Exploration Institute Jinzhong China;

School of Earth and Space Sciences University of Science and Technology of China Hefei China;

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原文格式 PDF
正文语种 chi
中图分类矿床学;
关键词
Qinshui Basin; Taiyuan Formation; Shale; Pore Structure; Mercury Intrusion Method; Liquid Nitrogen Method;

机译：沁水盆地太原组页岩孔隙结构汞侵入法液氮法;

Pore Structure Characteristics of Taiyuan Formation Shale in Qinshui Basin

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