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Fracturing of granite rock with supercritical water for superhot geothermal resources

Author

Listed:
  • Liu, Bailong
  • Suzuki, Anna
  • Watanabe, Noriaki
  • Ishibashi, Takuya
  • Sakaguchi, Kiyotoshi
  • Ito, Takatoshi

Abstract

Fracture patterns induced by supercritical-water fracturing show complex fracture networks with branched and isolated fractures. Such fracture patterns are expected to effectively increase permeability and significantly improve the heat exchange surface area. We clarify the mechanism of complex fracture induced by supercritical water using a coupled model and discuss the performance of the supercritical-water fracturing under geothermal environments. The numerical approaches to the coupled model are the pore-scale network method and finite element method with cohesive elements. Supercritical-water fracturing in granite at the laboratory scale was simulated and compared with the experimental results. The simulation results of fracture patterns are in good agreement with the experimental results.

Suggested Citation

  • Liu, Bailong & Suzuki, Anna & Watanabe, Noriaki & Ishibashi, Takuya & Sakaguchi, Kiyotoshi & Ito, Takatoshi, 2022. "Fracturing of granite rock with supercritical water for superhot geothermal resources," Renewable Energy, Elsevier, vol. 184(C), pages 56-67.
    • Handle: RePEc:eee:renene:v:184:y:2022:i:c:p:56-67
    DOI: 10.1016/j.renene.2021.11.062
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    Citations

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    Cited by:

    1. Chenbo Liu & Gan Feng & Hongqiang Xie & Jilan Wang & Zhipan Duan & Ye Tao & Gongda Lu & Huining Xu & Yaoqing Hu & Chun Li & Yuefei Hu & Qiuhong Wu & Lu Chen, 2022. "Study on the Accuracy of Fracture Criteria in Predicting Fracture Characteristics of Granite with Different Occurrence Depths," Energies, MDPI, vol. 15(23), pages 1-17, December.
    2. Ma, Yuanyuan & Li, Shibin & Zhang, Ligang & Liu, Songze & Wang, Ming, 2023. "Heat extraction performance evaluation of U-shaped well geothermal production system under different well-layout parameters and engineering schemes," Renewable Energy, Elsevier, vol. 203(C), pages 473-484.

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