Multifracture initiation from a series of noncircular convex wellbores
文献类型：期刊论文
| 作者 | Zhou, Zai-Le1,2; Guo, Yin-Tong1,2; Zhang, Xi3; Huang, Guang-Tan1,2 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 276期号:-页码:- |
| 关键词 | Dual criterion Initiation location Initiation pressure Convex wellbore High tortuosity of fracture |
| ISSN号 | 0013-7944 |
| 英文摘要 | In this study, a numerical model is proposed based on the dual toughness and strength criterion for fracture initiation to determine the fracture initiation location and initiation pressure. In the model, hydraulic fractures emanate from a noncircular convex wellbore, which is considered as a jointed cross between an ellipse and a circle. Numerical studies were performed to explore the behaviors associated with fracture initiation under different stress combinations. The results indicate that the initiation pressure is sensitive to the geometric parameters of the wellbore. The initiation location is mainly controlled by the wellbore shape under a near-equal stress state characterized by the ratio of deviation (S) to mean (P) stresses (S/P < 0.10); if S/P > 0.50, the initiation location is dominated by the stress state. For an intermediate stress state (0.10 = S/P = 0.50), the initiation location is affected by both the stress state and wellbore shape; multiple fractures are easier to initiate in the presence of a noncircular wellbore and tend to develop into an X shape. In addition, X-shaped fractures prefer externally expanded wellbores. The subsequent propagations of the X-shaped fractures were also modeled, and these fractures exhibited a strong near-well tortuosity. |
| 学科主题 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001003749400015 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35056]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing 100049, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 3.China University of Geoscience, Wuhan 430074, China |
| 推荐引用方式 GB/T 7714 | Zhou, Zai-Le,Guo, Yin-Tong,Zhang, Xi,et al. Multifracture initiation from a series of noncircular convex wellbores[J]. ENGINEERING FRACTURE MECHANICS,2022,276(-):-. |
| APA | Zhou, Zai-Le,Guo, Yin-Tong,Zhang, Xi,&Huang, Guang-Tan.(2022).Multifracture initiation from a series of noncircular convex wellbores.ENGINEERING FRACTURE MECHANICS,276(-),-. |
| MLA | Zhou, Zai-Le,et al."Multifracture initiation from a series of noncircular convex wellbores".ENGINEERING FRACTURE MECHANICS 276.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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