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Evolution of Pore Structure and Methane Adsorption in Lower Silurian Longmaxi Shale: Implications for Uplifted Shale Gas Reservoirs

文献类型：期刊论文

作者Wang, Duo1,2,3,4; Li, Xiao2; Li, Shouding2; Li, Guanfang2,4; Mao, Tianqiao2,4; Zheng, Bo2,4
刊名ROCK MECHANICS AND ROCK ENGINEERING
出版日期2023-07-13
页码19
关键词Pore structure evolution Shallow burial shale Gas storage capacity Mineral composition and fabric
ISSN号0723-2632
DOI10.1007/s00603-023-03441-w
英文摘要Pore volume, pore size and adsorption capacity are fundamental factors that control gas storage and production in shale reservoirs. We investigated the evolution of pore structure and adsorption capacity as functions of lithology and present-day burial depth. Nineteen shale samples from the Wufeng-Longmaxi Formation from shallow depths (present depths < 700 m) in the Sichuan Basin, China, were analyzed to elucidate the evolution of the pore system, applying N-2/CO2 isotherm adsorption, high-resolution FE-SEM, FIB-SEM, and CH4 isotherm adsorption. Two comparison basin models with 700 m and 4000 m present-day burial depth were constructed to illustrate the impact of uplift on pore structure and methane adsorption. The results indicate that mineral structure, rock fabric, and TOC content are essential factors affecting the pore structure. Pores of various sizes are preserved through different mechanisms during the compaction. The development of micropores is mainly controlled by thermal maturity and TOC content. In contrast, mesopores and macropores are stress-sensitive and prone to be compacted during deposition. Methane adsorption capacity is highly related to the burial depth. During the process of reservoir uplift, the methane adsorption capacity of the reservoir gradually increases with decreasing burial depth, with a transition point occurring between 700 and 1300 m. Furthermore, as the reservoir continues to uplift to burial depths below 700 m, the methane adsorption capacity of the reservoir in normally pressured shale gas formations rapidly decreases. However, for overpressured shale gas reservoirs, there is no significant change in the methane adsorption capacity of the reservoir.
WOS关键词SOUTHERN SICHUAN BASIN ; STORAGE CAPACITY ; THERMAL MATURITY ; JIAOSHIBA AREA ; GEOLOGICAL CONTROLS ; MIGRATION PATHWAYS ; CHINA IMPLICATIONS ; ORGANIC POROSITY ; BLACK SHALES ; WUFENG
资助项目National Natural Science Foundation of China[42090023]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:001029629000003
出版者SPRINGER WIEN
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/111298]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Wang, Duo; Li, Xiao
作者单位1.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G2E3, Canada
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
3.SINOPEC Petr Explorat & Prod Res Inst, Beijing 100083, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Duo,Li, Xiao,Li, Shouding,et al. Evolution of Pore Structure and Methane Adsorption in Lower Silurian Longmaxi Shale: Implications for Uplifted Shale Gas Reservoirs[J]. ROCK MECHANICS AND ROCK ENGINEERING,2023:19.
APA Wang, Duo,Li, Xiao,Li, Shouding,Li, Guanfang,Mao, Tianqiao,&Zheng, Bo.(2023).Evolution of Pore Structure and Methane Adsorption in Lower Silurian Longmaxi Shale: Implications for Uplifted Shale Gas Reservoirs.ROCK MECHANICS AND ROCK ENGINEERING,19.
MLA Wang, Duo,et al."Evolution of Pore Structure and Methane Adsorption in Lower Silurian Longmaxi Shale: Implications for Uplifted Shale Gas Reservoirs".ROCK MECHANICS AND ROCK ENGINEERING (2023):19.

入库方式： OAI收割

来源：地质与地球物理研究所

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