Study on the influence of vertical stress difference coefficient on fracture characteristics of shale under high stress
文献类型：期刊论文
| 作者 | Chang, Xin4; Qiu, Guozhou4,5; Li, Jing5; Guo, Yintong4; Hu, Zhiwen1; Yang, Hanzhi1,2,4; Zhang, Xinao4; Liu, Yongjiang3 |
| 刊名 | ENERGY SCIENCE & ENGINEERING
 |
| 出版日期 | 2024-07-31 |
| 页码 | 16 |
| 关键词 | fracture characteristics high stress shale vertical stress difference coefficient Xsite discrete grid method |
| DOI | 10.1002/ese3.1819 |
| 英文摘要 | To study the effect of vertical stress difference coefficient on fracture characteristics of shale fracturing, high stress true triaxial hydraulic fracturing test was carried out. By analyzing the profile after fracturing, it was found that the area of hydraulic fracture increased with the increase of vertical stress difference coefficient, and the probability of shear fracture will increase when the stress difference coefficient was high. A high vertical stress differential coefficient exerts a strong control over the direction of crack propagation, while a low vertical stress difference coefficient is beneficial to improve the roughness of hydraulic fracture surface and promote the formation of complex fracture network. By analyzing the pump pressure curves of different tests, it was found that with the increase of vertical stress difference coefficient, the formation and expansion of hydraulic fractures were more difficult. The surface characteristics of hydraulic fractures were quantified based on three-dimensional topography scanning technology, combined with fractal dimension and fracture area calculation method, the results showed that with the increase of vertical stress difference coefficient, the fractal dimension and fracture area decreased. Since shale is stratified, and the transformation of reservoir is mainly reflected in the enhancement of fracture complexity through tensile failure, Xsite discrete grid method was used to study the influence of fracture propagation behavior with different bedding strengths. The results showed that when the bedding tensile strength was high, hydraulic fractures were easy to pass through the bedding, and when the bedding tensile strength was low, hydraulic fractures were easy to be captured by natural fractures. In addition, tensile cracks were easy to form when the tensile strength of bedding was low, shear cracks were easy to form when the strength of bedding was high, and the fracture volume was larger when the strength of bedding was low. This study provides a theoretical basis for hydraulic fracturing in engineering. |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:001280992400001 |
| 出版者 | WILEY |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42150]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Guozhou |
| 作者单位 | 1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing, Peoples R China 2.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB, Canada 3.Sinopec, Shale Gas Dev Technol Serv Co JHOSC, Wuhan, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 5.China Univ Petr East China, Sch Pipeline & Civil Engn, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Xin,Qiu, Guozhou,Li, Jing,et al. Study on the influence of vertical stress difference coefficient on fracture characteristics of shale under high stress[J]. ENERGY SCIENCE & ENGINEERING,2024:16. |
| APA | Chang, Xin.,Qiu, Guozhou.,Li, Jing.,Guo, Yintong.,Hu, Zhiwen.,...&Liu, Yongjiang.(2024).Study on the influence of vertical stress difference coefficient on fracture characteristics of shale under high stress.ENERGY SCIENCE & ENGINEERING,16. |
| MLA | Chang, Xin,et al."Study on the influence of vertical stress difference coefficient on fracture characteristics of shale under high stress".ENERGY SCIENCE & ENGINEERING (2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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