Visualization and characterization of experimental hydraulic fractures interacting with karst fracture-cavity distributions
文献类型：期刊论文
| 作者 | Yang, Hanzhi1; Chang, Xin2; Yang, Chunhe1,2; Guo, Wuhao2; Wang, Lei2; Zhao, Guokai1; Guo, Yintong2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-05-01 |
| 卷号 | 16期号:5页码:1667-1683 |
| 关键词 | Karst fracture-cavity reservoir Fracturing experiment Fracture propagation Cross-sectional morphology Stimulation effectiveness |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.08.010 |
| 英文摘要 | Karst fracture-cavity carbonate reservoirs, in which natural cavities are connected by natural fractures to form cavity clusters in many circumstances, have become significant fields of oil and gas exploration and exploitation. Proppant fracturing is considered as the best method for exploiting carbonate reservoirs; however, previous studies primarily focused on the effects of individual types of geological formations, such as natural fractures or cavities, on fracture propagation. In this study, true-triaxial physical simulation experiments were systematically performed under four types of stress difference conditions after the accurate prefabrication of four types of different fracture-cavity distributions in artificial samples. Subsequently, the interaction mechanism between the hydraulic fractures and fracture-cavity structures was systematically analyzed in combination with the stress distribution, cross-sectional morphology of the main propagation path, and three-dimensional visualization of the overall fracture network. It was found that the propagation of hydraulic fractures near the cavity was inhibited by the stress concentration surrounding the cavity. In contrast, a natural fracture with a smaller approach angle (0 degrees and 30 degrees) around the cavity can alleviate the stress concentration and significantly facilitate the connection with the cavity. In addition, the hydraulic fracture crossed the natural fracture at the 45 degrees approach angle and bypassed the cavity under higher stress difference conditions. A new stimulation effectiveness evaluation index was established based on the stimulated reservoir area (SRA), tortuosity of the hydraulic fractures (T), and connectivity index (CI) of the cavities. These findings provide new insights into the fracturing design of carbonate reservoirs. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[52104046] ; National Natural Science Foundation of China[52104010] ; China Scholarship Council |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001290945700001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42218]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Chang, Xin |
| 作者单位 | 1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Hanzhi,Chang, Xin,Yang, Chunhe,et al. Visualization and characterization of experimental hydraulic fractures interacting with karst fracture-cavity distributions[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(5):1667-1683. |
| APA | Yang, Hanzhi.,Chang, Xin.,Yang, Chunhe.,Guo, Wuhao.,Wang, Lei.,...&Guo, Yintong.(2024).Visualization and characterization of experimental hydraulic fractures interacting with karst fracture-cavity distributions.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(5),1667-1683. |
| MLA | Yang, Hanzhi,et al."Visualization and characterization of experimental hydraulic fractures interacting with karst fracture-cavity distributions".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.5(2024):1667-1683. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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