Effect of natural filling fracture on the cracking process of shale Brazilian disc containing a central straight notched flaw
文献类型：期刊论文
| 作者 | Zhou, Jun1,2; Zeng, Yijin4,5; Guo, Yintong1,2; Chang, Xin1,2; Liu, Liwang1,2; Wang, Lei1,2; Hou, Zhenkun3; Yang, Chunhe1,2 |
| 刊名 | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
 |
| 出版日期 | 2021 |
| 卷号 | 196页码:18 |
| 关键词 | Natural fracture Fracture interaction Crack propagation Acoustic emission (AE) Central straight notched Brazilian disc (CSNBD) Shale |
| ISSN号 | 0920-4105 |
| DOI | 10.1016/j.petrol.2020.107993 |
| 英文摘要 | The interaction between hydraulic fractures and natural fractures is a key factor in the forming of complex networks during shale fracturing. In spite of abundant natural filling fractures having been found in practical shale layers, previous studies have either ignored the effects of natural fractures or highly simplified them. In order to investigate how the natural filling fracture effect on crack propagation, in this paper, the central straight notched Brazilian discs (CSNBD) of shale under different loading angles were used to study the crack initiation and propagation via digital image correlation (DIC) method. The testing results reveal that the natural filling fracture leads to larger loading displacement, more active acoustic emission signals and lower strength, which indicates that the infillings may contain numerous micro-cracks, therefore, making the filling fracture a weak structure; The crack propagating path was unaffected when the filling natural fracture is parallel to loading line, while the natural filling fractures still on the risk of cracking due to the incompatible deformation between the natural infillings and the host rock; Besides, the initial cracking angle of the crack tip near the natural filling fracture increases while it decreases for the crack tip away from the natural filling fracture when the loading angle is 30 degrees, 60 degrees and 90 degrees, nevertheless, for these discs without an infilling fracture, the two wing cracks are nearly symmetrical and initial cracking angles are almost equal. This research manifests that, on the laboratory scale, the failure modes and the cracking patterns of shale become more complicated when natural filling fractures exist. Therefore the influences of natural filling fractures could be even more significant when it is referred to the practical scale of on-site hydraulic fracturing, the related topics should be further studied in detail. |
| 资助项目 | National Natural Science Foundation of China[51574218] ; National Science and Technology Major Project of China[2016ZX05060-004] ; National Science and Technology Major Project of China[2017ZX05036-003] ; China postdoctoral science foundation[2019M662918] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z019018] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515110836] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000600808100155 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25513]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Guo, Yintong; Chang, Xin |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Guangzhou Inst Bldg Sci Co Ltd, Guangzhou 510440, Peoples R China 4.State Key Lab Shale Oil & Gas Enrichment Mech & E, Beijing 100101, Peoples R China 5.SINOPEC Res Inst Petr Engn, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Jun,Zeng, Yijin,Guo, Yintong,et al. Effect of natural filling fracture on the cracking process of shale Brazilian disc containing a central straight notched flaw[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2021,196:18. |
| APA | Zhou, Jun.,Zeng, Yijin.,Guo, Yintong.,Chang, Xin.,Liu, Liwang.,...&Yang, Chunhe.(2021).Effect of natural filling fracture on the cracking process of shale Brazilian disc containing a central straight notched flaw.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,196,18. |
| MLA | Zhou, Jun,et al."Effect of natural filling fracture on the cracking process of shale Brazilian disc containing a central straight notched flaw".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 196(2021):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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