Development status and research recommendations for thermal extraction technology in deep hot dry rock reservoirs
Diquan Li, Ning Li, Jing Jia, Hongguang Yu, Qinghu Fan, Lichang Wang, Ahmed Mohsen
发布时间：2024-03-19
关键词：enhanced geothermal system, hot dry rock reservoir, thermoelastic stress, thermo‐hydro‐mechanicalcoupling
摘要：this article delves into a detailed discussion on the influence of fracture spacing, fracture permeability, fracture length, fluid injection rate, and injected fluid temperature on the performance of the EGS. In light of the thermo-hydro-mechanical coupling challenges associated with high-temperature reservoirs, it is suggested that future research efforts should focus on investigating the impact of thermo-induced stresses on the stability of the artificial fracture network within the EGS during long-term (>30 years) circulation of hot and cold fluids.
阅读全文 PDF 引用A thermal stress loading technique for large-sized hot dry rock mechanical tests
Huiling Ci, Bing Bai, Hongwu Lei, Yan Zou, Jianfeng Liu
发布时间：2024-04-26
关键词：Deep rock engineering, high‐temperature and high‐stress conditions, hot dry rock, large‐sized modeltest, thermal stress loading
摘要：AbstractTesting of large-sized specimens is becoming increasingly important in deep underground rock mechanics and engineering. In traditional mechanical loading, stresses on large-sized specimens are achieved by large host frames and hydraulic pumps, which could lead to great investment. Low-cost testing machines clearly always have great appeal. In this study, a new approach is proposed using...
阅读全文 PDF 引用Application of integrated geophysical techniques in geothermal exploration in Binhai County, Jiangsu Province
Juncheng Wang, Shiyin Gao, Jianguo Wang, Lin Li, Xiaoyan Gong, Jinbao Su
发布时间：2024-09-27
关键词：Application of integrated geophysical techniques in geothermal exploration Binhai County Jiangsu Province
摘要：AbstractIntegrated geophysical technology is a necessary and effective means for geothermal exploration. However, integration of geophysical technology for large-scale surveys with those for geothermal reservoir localization is still in development. This study used the controlled source audio-frequency magnetotelluric method technology for large-scale exploration to obtain underground electrica...
阅读全文 PDF 引用Performance analysis of deep borehole heat exchangers for decarbonization of heating systems
Andreas E. D. Lund
发布时间：2024-05-16
关键词：clean energy, deep borehole exchangers, energy transition, geothermal heat, ground‐coupledheat pump
摘要：AbstractMeeting the climate change mitigation targets will require a substantial shift from fossil to clean fuels in the heating sector. Heat pumps with deep borehole exchangers are a promising solution to reduce emissions. Here the thermal behavior of deep borehole exchangers (DBHEs) ranging from 1 to 2 km was analyzed for various heat flow profiles. A strong correlation between thermal energ...
阅读全文 PDF 引用Impact of well placement and flow rate on production efficiency and stress field in the fractured geothermal reservoirs
Xinghui Wu, Meifeng Cai, Xu Wu, Ketong Zhang, Ziqing Yin, Yu Zhu
发布时间：2024-09-27
关键词：Impact of well placement and flow rate on production efficiency stress field in the fractured geothermal reservoirs
摘要：AbstractGeothermal energy has gained wide attention as a renewable alternative for mitigating greenhouse gas emissions. The advancements in enhanced geothermal system technology have enabled the exploitation of previously inaccessible geothermal resources. However, the extraction of geothermal energy from deep reservoirs poses many challenges due to high-temperature and high-geostress condition...
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