Numerical study of initiation pressure in hydraulic fracturing by dual criterion for non-circular wellbore
文献类型：期刊论文
| 作者 | Zhou, Zai-Le1,2; Yang, Dian-Sen1,2; Chen, Wei-Zhong1,2; Zhang, Xi3; Wu, Bai-Lin3; Zhang, Feng-Shou4 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 252期号:-页码:15 |
| 关键词 | Initiation pressure Initiation length Dual criterion Wellbore breakout Multi-initiation points |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2021.107804 |
| 英文摘要 | In this paper, the DDM numerical method is used to calculate the initiation pressure and initiation length of the circular wellbore, or the further elongated and non-elongated 'dog-ear' breakout wellbore under different sizes and different stress states. An analysis is made about the transfer of the fracture initiation point for the further elongated breakout wellbore and its possible impacts. The numerical results show that for small-size wellbore ((Rw sigma t2)/KIC2 2), the initiation pressure is dominated by fracture toughness, and for large-size wellbore ((Rw sigma t2)/KIC2 6.4), the initiation fracture is dominated by tensile strength. There is only small difference between the initiation pressure of the 'dog-ear'breakout wellbore and the circular wellbore. With further elongation of the 'dog-ear' wellbore or increase of the curvature radius around initiation point, the initiation pressure fracture along the direction of the maximum principal stress also increases in most cases. The further elongated 'dog-ear' wellbore causes the initiation point of the wellbore to deviate away from the direction of the maximum principal stress, and the existence of at least four initiation points tends to cause X-shaped fracture initiation around the wellbore, which may promote the further increase of the initiation pressure. The research in this paper provides a new possible version of multi-fracture initiation around wellbore and abnormally high initiation pressure during fracturing operation. |
| 资助项目 | National Natural Science Foundation of China[51879260] ; National Natural Science Foundation of China[51879258] ; National Natural Science Foundation of China[11672099] ; China Postdoctoral Science foundation[2020M672456] ; CAS Interdisciplinary Innovation Team[JCTD201817] ; Key Research Program of the Chinese Academy of Sciences[KFZD-SW-423] ; Hubei Provincial Natural Science Foundation of China[2018CFA012] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000681100000006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/27641]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CSIRO Energy, Clayton, Vic 3168, Australia 4.Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Zai-Le,Yang, Dian-Sen,Chen, Wei-Zhong,et al. Numerical study of initiation pressure in hydraulic fracturing by dual criterion for non-circular wellbore[J]. ENGINEERING FRACTURE MECHANICS,2021,252(-):15. |
| APA | Zhou, Zai-Le,Yang, Dian-Sen,Chen, Wei-Zhong,Zhang, Xi,Wu, Bai-Lin,&Zhang, Feng-Shou.(2021).Numerical study of initiation pressure in hydraulic fracturing by dual criterion for non-circular wellbore.ENGINEERING FRACTURE MECHANICS,252(-),15. |
| MLA | Zhou, Zai-Le,et al."Numerical study of initiation pressure in hydraulic fracturing by dual criterion for non-circular wellbore".ENGINEERING FRACTURE MECHANICS 252.-(2021):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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