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Direct imaging of micropores in shale kerogen

文献类型：期刊论文

作者Liu, Yu4; Su, Chi2,3; Shang, Fuhua1
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2022-12-01
卷号146页码:5
关键词Shale gas Kerogen Micropore Molecular structure
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2022.105928
英文摘要Although micropores (<2 nm) play an important role in shale gas storage, these pores have not been imaged previously. Aberration-corrected scanning transmission electron microscope (AC-STEM) with a secondary elec-tron detector (SED) has been used here to study such pores in kerogen isolated from Longmaxi shale. In addition, a three-dimensional (3D) kerogen molecular model was constructed based on 13C Nuclear Magnetic Resonance (13C NMR), Fourier transform infrared spectroscopy (FT-IR) and CO2 adsorption experiments, to further study the relationship between micropores and kerogen molecule. The results show that AC-TEM with SED can directly image pores smaller than 2 nm in the kerogen particle by operating in the scanning transmission electron mi-croscopy (STEM) mode. These micropores can occur everywhere on the kerogen surface, which is consistent with the large micropore volume and surface area determined by gas (CO2 and N2) adsorption experiments. The surface of the 3D kerogen model is similar to that observed in the SED-STEM images in terms of surface morphology and scale. This suggests that the 3D model of the kerogen molecule is a good representation of the kerogen sample. This study links the direct images of micropores in kerogen sample and the kerogen molecular models, which is important for further understanding of shale gas storage, as these micropores and molecules provide the sites and surface energy for methane storage.
WOS关键词PORE STRUCTURE ; COAL
资助项目National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; [42172156] ; [41872132] ; [2022YQDC07]
WOS研究方向Geology
语种英语
WOS记录号WOS:000869570200002
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
源URL[http://ir.iggcas.ac.cn/handle/132A11/107793]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Liu, Yu
作者单位1.China Univ Min & Technol, Key Lab Coalbed Methane Resources & Reservoir Form, Minist Educ, Xuzhou 221008, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.China Univ Min & Technol, Coll Geosci & Survey Engn, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yu,Su, Chi,Shang, Fuhua. Direct imaging of micropores in shale kerogen[J]. MARINE AND PETROLEUM GEOLOGY,2022,146:5.
APA Liu, Yu,Su, Chi,&Shang, Fuhua.(2022).Direct imaging of micropores in shale kerogen.MARINE AND PETROLEUM GEOLOGY,146,5.
MLA Liu, Yu,et al."Direct imaging of micropores in shale kerogen".MARINE AND PETROLEUM GEOLOGY 146(2022):5.

入库方式： OAI收割

来源：地质与地球物理研究所

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