Effect of mesoscopic heterogeneity on hydraulic fracturing characteristics of granite under high temperature
文献类型：期刊论文
| 作者 | Jiang, Changbao4; Lei, Yunpeng4; Deng, Bozhi4; Fan, Xiangyu3; Li, Minghui2; Wu, Mingyang1 |
| 刊名 | GEOENERGY SCIENCE AND ENGINEERING
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 246页码:17 |
| ISSN号 | 2949-8929 |
| DOI | 10.1016/j.geoen.2024.213626 |
| 英文摘要 | Hot dry rock (HDR) geothermal energy is a high-temperature renewable resource with great potential. Studying the physical properties of hot dry rock is significant for geothermal energy development. At the mesoscopic level, differences in mineral composition, grain size, and spatial distribution within granite contribute to its heterogeneity, which significantly affects the efficiency of reservoir stimulation during geothermal energy extraction. To elucidate the influence of granite heterogeneity on hydraulic fracture propagation, this study proposes a new method for characterizing heterogeneity using scanning electron microscopy (SEM) combined with image digitization techniques, introducing the mesoscopic heterogeneity factor (R). Hydraulic fracturing experiments were performed on two types of granite with different heterogeneity under high temperature conditions (25 degrees C-300 degrees C). Experimental results reveal that the R-value of one granite is 2.1 times that of the other. The breakdown pressure of the samples with larger R-value is consistently lower than that of samples with lower R-value, while their hydraulic fractures exhibit greater complexity and higher fractal dimensions for both fracture surfaces and overall fracture networks, indicating significant fractal characteristics. These findings demonstrate that granites with larger R-values are more susceptible to temperature effects, leading to degraded mechanical properties and the formation of rougher and more complex fracture networks. This study provides theoretical support for optimizing reservoir stimulation strategies in the extraction of HDR geothermal energy. |
| 资助项目 | National Natural Science Foundation of China[52274111] ; National Natural Science Foundation of China[52192625] ; National Natural Science Foundation of China[52474209] ; National Natural Science Foundation of China[52474125] ; Special Funding for Postdoctoral Research Projects in Chongqing[2021XM2004] ; Guangdong Provincial Key Laboratory of Deep Earth Science and Geothermal Energy Utilization[DESGEEU-2023-5] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001397375200001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37224]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Deng, Bozhi |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Shenzhen Univ, Inst Deep Earth Sci & Green Energy, Guangdong Prov Key Lab Deep Earth Sci & Geothermal, Shenzhen 518060, Peoples R China 3.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploitat, Chengdu 610500, Peoples R China 4.Chongqing Univ, Sch Resources & Safety Engn, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Changbao,Lei, Yunpeng,Deng, Bozhi,et al. Effect of mesoscopic heterogeneity on hydraulic fracturing characteristics of granite under high temperature[J]. GEOENERGY SCIENCE AND ENGINEERING,2025,246:17. |
| APA | Jiang, Changbao,Lei, Yunpeng,Deng, Bozhi,Fan, Xiangyu,Li, Minghui,&Wu, Mingyang.(2025).Effect of mesoscopic heterogeneity on hydraulic fracturing characteristics of granite under high temperature.GEOENERGY SCIENCE AND ENGINEERING,246,17. |
| MLA | Jiang, Changbao,et al."Effect of mesoscopic heterogeneity on hydraulic fracturing characteristics of granite under high temperature".GEOENERGY SCIENCE AND ENGINEERING 246(2025):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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