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Heat extraction study of a novel hydrothermal open-loop geothermal system in a multi-lateral horizontal well

Author

Listed:
  • Wang, Gaosheng
  • Song, Xianzhi
  • Yu, Chao
  • Shi, Yu
  • Song, Guofeng
  • Xu, Fuqiang
  • Ji, Jiayan
  • Song, Zihao

Abstract

The efficient development of hydrothermal resource is an important focus in the global geothermal industry. A novel hydrothermal open-loop geothermal system in a multi-lateral horizontal well is presented to achieve the simultaneous exploitation of multi-layer reservoirs and accelerate the large-scale development of the hydrothermal resource. To investigate the detailed performance of the novel geothermal system, a novel 3D fluid flow and heat transfer numerical model is established based on the local thermal non-equilibrium and dual porosity theories. The flow and temperature fields are analyzed, while the pressure and temperature interferences between the lateral wellbores of the multi-lateral horizontal well system are comprehensively investigated. The influences of the injection flow rate, lateral-wellbore number, spacing between the injection segment and the main wellbore, fracture aperture on the heat extraction are studied. Furthermore, the thermal characteristics of the novel geothermal system and traditional doublet well system are compared for the first time. The investigation indicates that the flow impedance of the novel geothermal system can decrease by 75.38%, and its energy efficiency reaches 8 times that of the doublet well system. The findings can provide a key reference for scientific research and application of the novel and traditional geothermal systems.

Suggested Citation

  • Wang, Gaosheng & Song, Xianzhi & Yu, Chao & Shi, Yu & Song, Guofeng & Xu, Fuqiang & Ji, Jiayan & Song, Zihao, 2022. "Heat extraction study of a novel hydrothermal open-loop geothermal system in a multi-lateral horizontal well," Energy, Elsevier, vol. 242(C).
  • Handle: RePEc:eee:energy:v:242:y:2022:i:c:s0360544221027766
    DOI: 10.1016/j.energy.2021.122527
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    2. Gao, Xuefeng & Zhang, Yanjun & Cheng, Yuxiang & Huang, Yibin & Deng, Hao & Ma, Yongjie, 2022. "A novel strategy utilizing local fracture networks to enhance CBHE heat extraction performance: A case study of the Songyuan geothermal field in China," Energy, Elsevier, vol. 255(C).
    3. Qiao, Mingzheng & Jing, Zefeng & Feng, Chenchen & Li, Minghui & Chen, Cheng & Zou, Xupeng & Zhou, Yujuan, 2024. "Review on heat extraction systems of hot dry rock: Classifications, benefits, limitations, research status and future prospects," Renewable and Sustainable Energy Reviews, Elsevier, vol. 196(C).
    4. Duan, Hongyu & Ma, Dan & Zou, Liangchao & Xie, Shijie & Liu, Yong, 2024. "Co-exploitation of coal and geothermal energy through water-conducting structures: Improving extraction efficiency of geothermal well," Renewable Energy, Elsevier, vol. 228(C).
    5. Li, Shuang & Wang, Gaosheng & Zhou, Mengmeng & Song, Xianzhi & Shi, Yu & Yi, Junlin & Zhao, Jialin & Zhou, Yifan, 2024. "Thermal performance of an aquifer thermal energy storage system: Insights from novel multilateral wells," Energy, Elsevier, vol. 294(C).

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