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  2. 广州地球化学研究所
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  4. 有机地球化学国家重点实验室
Combining atomic force microscopy and nanoindentation helps characterizing in-situ mechanical properties of organic matter in shale

文献类型：期刊论文

作者Wang, Jianfeng1,2,5,6,7; Dziadkowiec, Joanna5,6; Liu, Yuke4; Jiang, Wenmin2,7; Zheng, Yijun2,7; Xiong, Yongqiang2,7; Peng, Ping'an2,7; Renard, Francois3,5,6
刊名INTERNATIONAL JOURNAL OF COAL GEOLOGY
出版日期2024-01-05
卷号281页码:14
关键词Organic matter Wufeng-Longmaxi shale In-situ Nanoindentation Atomic force microscopy Mechanical properties
ISSN号0166-5162
DOI10.1016/j.coal.2023.104406
英文摘要The quantification of mechanical properties of organic matter in shale is of significance for the fine prediction and characterization of shale reservoir's mechanical properties. Due to the micron-sized and dispersed distribution of organic matter particles in shale, the accurate evaluation of the actual mechanical response remains challenging. This work focuses on shale from Wufeng-Longmaxi Formation, which is the main shale gas exploration and development formation in China. A method based on atomic force microscopy (AFM) with an optical microscope (i.e., in-situ AFM technique) is presented to locate the organic matter in-situ and then visualize and quantify its mechanical properties using AFM Young's modulus mapping. The merits and limitations for determining the mechanical properties of organic matter in shale between the AFM and the more conventional nanoindentation technique are discussed. Results show that combining in-situ nanoindentation and in-situ AFM mapping provides more accurate description of the mechanical properties of organic matter in shale than traditional grid indentation methods with low spatial resolution. The Young's moduli of organic matter calculated from nanoindentation are around twice smaller than those obtained from AFM measurements mainly because the elasto-plastic deformation zone of organic matter in nanoindentation tests is larger and can be additionally affected by the presence of inorganic particles and/or larger micro-pores in organic matter. The Young's modulus and hardness of graptolite in the shale obtained by nanoindentation are slightly larger than those of solid bitumen at the same thermal maturity. Both in-situ AFM and in-situ nanoindentation results show that the mechanical strength of organic matter increases with increasing maturity. Overall, the presented approach shows a great potential for accurate and in-situ measurement of the mechanical properties of organic matter in shale at the nanoscale, which may be beneficial to the development of rock mechanical models for the accurate evaluation of the actual mechanical properties of shale.
WOS研究方向Energy & Fuels ; Geology
语种英语
WOS记录号WOS:001160069400001
源URL[http://ir.gig.ac.cn/handle/344008/76288]  
专题有机地球化学国家重点实验室
通讯作者Dziadkowiec, Joanna; Xiong, Yongqiang
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
3.Univ Gustave Eiffel, Univ Grenoble Alpes, Univ Savoie Mont Blanc, CNRS,IRD,ISTerre, F-38000 Grenoble, France
4.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
5.Univ Oslo, Njord Ctr, Dept Phys, N-0316 Oslo, Norway
6.Univ Oslo, Njord Ctr, Dept Geosci, N-0316 Oslo, Norway
7.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Jianfeng,Dziadkowiec, Joanna,Liu, Yuke,et al. Combining atomic force microscopy and nanoindentation helps characterizing in-situ mechanical properties of organic matter in shale[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2024,281:14.
APA Wang, Jianfeng.,Dziadkowiec, Joanna.,Liu, Yuke.,Jiang, Wenmin.,Zheng, Yijun.,...&Renard, Francois.(2024).Combining atomic force microscopy and nanoindentation helps characterizing in-situ mechanical properties of organic matter in shale.INTERNATIONAL JOURNAL OF COAL GEOLOGY,281,14.
MLA Wang, Jianfeng,et al."Combining atomic force microscopy and nanoindentation helps characterizing in-situ mechanical properties of organic matter in shale".INTERNATIONAL JOURNAL OF COAL GEOLOGY 281(2024):14.

入库方式： OAI收割

来源：广州地球化学研究所

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