IGGCAS OpenIR  > 页岩气与地质工程院重点实验室
An Experimental Analysis of Microcrack Generation during Hydraulic Fracturing of Shale
Qu, Xiaolei1,2; Zhang, Yunkai1,2; Liu, Fanyue1,2; He, Jianming3,4; Dyskin, Arcady V.5; Qi, Chengzhi1,2
2022-04-01
Source PublicationCOATINGS
Volume12Issue:4Pages:14
AbstractHydraulic 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.
Keywordfracture propagation stress singularity microcrack generation microcrack statistics
DOI10.3390/coatings12040483
Funding OrganizationNational 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
WOS KeywordFLUID-DRIVEN FRACTURE ; PROPAGATION ; INITIATION ; SANDSTONE ; PRESSURE ; BEHAVIOR ; GROWTH ; WATER ; ROCK
Language英语
Funding ProjectNational Natural Science Foundation of China[41877270] ; Australian Research Council[DP190103260]
Funding OrganizationNational 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
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000787492400001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105146
Collection页岩气与地质工程院重点实验室
Corresponding AuthorQu, Xiaolei
Affiliation1.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
Recommended Citation
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.
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