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An Experimental Analysis of Microcrack Generation during Hydraulic Fracturing of Shale

文献类型：期刊论文

作者Qu, Xiaolei1,2; Zhang, Yunkai1,2; Liu, Fanyue1,2; He, Jianming3,4; Dyskin, Arcady V.5; Qi, Chengzhi1,2
刊名COATINGS
出版日期2022-04-01
卷号12期号:4页码:14
关键词fracture propagation stress singularity microcrack generation microcrack statistics
DOI10.3390/coatings12040483
英文摘要Hydraulic fracturing is commonly applied in the shale gas exploitation industry. However, the mechanical mechanism of permeability under fracturing has so far been unclear. In this study, an analysis of laboratory experiments on hydraulic fracture propagation and bedding plane reactivation in shale is presented. To investigate microcrack occurrence under fracturing, several small slices were collected from the fracture surface and scanned with a scanning electron microscope (SEM). It was found that observed microscopic microcracks could not be produced by fluid pressure as the latter generated compressive stresses at the site of microcracks. Rather, the microcracks were produced by tensile stress concentration in front of the propagating fracture. This implies that bedding plane reactivation was caused by fracture propagation along the plane. An analysis of microcrack lengths showed that shale exhibited anisotropy in fracture toughness with resistance to fracture propagation parallel to bedding planes being twice as small compared to resistance to fracture propagation in the direction normal to bedding planes.
WOS关键词FLUID-DRIVEN FRACTURE ; PROPAGATION ; INITIATION ; SANDSTONE ; PRESSURE ; BEHAVIOR ; GROWTH ; WATER ; ROCK
资助项目National Natural Science Foundation of China[41877270] ; Australian Research Council[DP190103260]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000787492400001
出版者MDPI
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Australian Research Council ; Australian Research Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/105146]  
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Qu, Xiaolei
作者单位1.Beijing Univ Civil Engn & Architecture, Beijing Res Ctr Engn Struct & New Mat, Beijing 100044, Peoples R China
2.Beijing Adv Innovat Ctr Future Urban Design, Beijing 100044, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Dept Geophys, Beijing 100049, Peoples R China
5.Univ Western Australia, Dept Civil Environm & Min Engn, Crawley, WA 6009, Australia
推荐引用方式
GB/T 7714		 Qu, Xiaolei,Zhang, Yunkai,Liu, Fanyue,et al. An Experimental Analysis of Microcrack Generation during Hydraulic Fracturing of Shale[J]. COATINGS,2022,12(4):14.
APA Qu, Xiaolei,Zhang, Yunkai,Liu, Fanyue,He, Jianming,Dyskin, Arcady V.,&Qi, Chengzhi.(2022).An Experimental Analysis of Microcrack Generation during Hydraulic Fracturing of Shale.COATINGS,12(4),14.
MLA Qu, Xiaolei,et al."An Experimental Analysis of Microcrack Generation during Hydraulic Fracturing of Shale".COATINGS 12.4(2022):14.

入库方式： OAI收割

来源：地质与地球物理研究所

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