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Coupled thermal–hydraulic–mechanical model for an enhanced geothermal system and numerical analysis of its heat mining performance

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  • Zhou, Luming
  • Zhu, Zhende
  • Xie, Xinghua
  • Hu, Yunjin

Abstract

The operation of an enhanced geothermal system (EGS) involves a complex thermal–hydraulic–mechanical (THM) coupling process, which is important for exploiting the geothermal energy contained in hot dry rocks. In this study, the THM coupling mechanism in an EGS reservoir is explained, and a fully coupled THM mathematical model with local thermal nonequilibrium of a dual media is established, considering the dynamic changes in the properties of the rock matrix, fractures, and fluid during EGS operation. The model is verified through an example of the thermoelastic consolidation of a saturated soil. The heat transfer, fluid flow, and mechanical characteristics of a geothermal reservoir over 40 years are studied via a numerical simulation of a 2D geometric model. The effects of fracture occurrence, coupling conditions, and model parameters on the mining performance are analyzed. The results show that the dual-media model can reflect the anisotropy in the temperature, pressure, and stress due to the presence of fractures. An area with a more complex fracture network and smaller spacing is found to be more conducive for heat transfer. The inlet–outlet pressure differences, thermal expansion coefficient of the rock matrix, and initial fracture permeability have significant effects. When the inlet–outlet pressure difference is increased from 4 to 10 MPa, the heat extraction ratio increases from 56% to 89% at 40 years, and the initial output thermal power is increased from 9.2 to 24.9 MW. When the coefficient of thermal expansion is increased from 1 × 10−6 to 7 × 10−6 K−1, the heat extraction ratio is increased from 54% to 84%, and the initial output thermal power is increased from 8.5 to 19.7 MW. When the initial permeability is increased from 1 × 10−11 to 2.5 × 10−11 m2, the heat extraction ratio increases from 74% to 92%. These results provide a reference for optimizing the mining effect of the EGS.

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  • Zhou, Luming & Zhu, Zhende & Xie, Xinghua & Hu, Yunjin, 2022. "Coupled thermal–hydraulic–mechanical model for an enhanced geothermal system and numerical analysis of its heat mining performance," Renewable Energy, Elsevier, vol. 181(C), pages 1440-1458.
    • Handle: RePEc:eee:renene:v:181:y:2022:i:c:p:1440-1458
    DOI: 10.1016/j.renene.2021.10.014
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    1. Shi, Yu & Song, Xianzhi & Shen, Zhonghou & Wang, Gaosheng & Li, Xiaojiang & Zheng, Rui & Geng, Lidong & Li, Jiacheng & Zhang, Shikun, 2018. "Numerical investigation on heat extraction performance of a CO2 enhanced geothermal system with multilateral wells," Energy, Elsevier, vol. 163(C), pages 38-51.
    2. Lu, Shyi-Min, 2018. "A global review of enhanced geothermal system (EGS)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 2902-2921.
    3. Zhang, Jie & Xie, Jingxuan, 2020. "Effect of reservoir’s permeability and porosity on the performance of cellular development model for enhanced geothermal system," Renewable Energy, Elsevier, vol. 148(C), pages 824-838.
    4. Zhao, Yangsheng & Feng, Zijun & Feng, Zengchao & Yang, Dong & Liang, Weiguo, 2015. "THM (Thermo-hydro-mechanical) coupled mathematical model of fractured media and numerical simulation of a 3D enhanced geothermal system at 573 K and buried depth 6000–7000 M," Energy, Elsevier, vol. 82(C), pages 193-205.
    5. Muhammad Haris & Michael Z. Hou & Wentao Feng & Jiashun Luo & Muhammad Khurram Zahoor & Jianxing Liao, 2020. "Investigative Coupled Thermo-Hydro-Mechanical Modelling Approach for Geothermal Heat Extraction through Multistage Hydraulic Fracturing from Hot Geothermal Sedimentary Systems," Energies, MDPI, vol. 13(13), pages 1-21, July.
    6. Zhang, Wei & Qu, Zhanqing & Guo, Tiankui & Wang, Zhiyuan, 2019. "Study of the enhanced geothermal system (EGS) heat mining from variably fractured hot dry rock under thermal stress," Renewable Energy, Elsevier, vol. 143(C), pages 855-871.
    7. Zeng, Yu-Chao & Su, Zheng & Wu, Neng-You, 2013. "Numerical simulation of heat production potential from hot dry rock by water circulating through two horizontal wells at Desert Peak geothermal field," Energy, Elsevier, vol. 56(C), pages 92-107.
    8. Anderson, Austin & Rezaie, Behnaz, 2019. "Geothermal technology: Trends and potential role in a sustainable future," Applied Energy, Elsevier, vol. 248(C), pages 18-34.
    9. Chamorro, César R. & García-Cuesta, José L. & Mondéjar, María E. & Pérez-Madrazo, Alfonso, 2014. "Enhanced geothermal systems in Europe: An estimation and comparison of the technical and sustainable potentials," Energy, Elsevier, vol. 65(C), pages 250-263.
    10. Zhao, Yangsheng & Feng, Zijun & Xi, Baoping & Wan, Zhijun & Yang, Dong & Liang, Weiguo, 2015. "Deformation and instability failure of borehole at high temperature and high pressure in Hot Dry Rock exploitation," Renewable Energy, Elsevier, vol. 77(C), pages 159-165.
    11. Franco, Alessandro & Vaccaro, Maurizio, 2014. "Numerical simulation of geothermal reservoirs for the sustainable design of energy plants: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 30(C), pages 987-1002.
    12. Asai, Pranay & Panja, Palash & McLennan, John & Moore, Joseph, 2018. "Performance evaluation of enhanced geothermal system (EGS): Surrogate models, sensitivity study and ranking key parameters," Renewable Energy, Elsevier, vol. 122(C), pages 184-195.
    13. Xu, Chaoshui & Dowd, Peter Alan & Tian, Zhao Feng, 2015. "A simplified coupled hydro-thermal model for enhanced geothermal systems," Applied Energy, Elsevier, vol. 140(C), pages 135-145.
    14. Melikoglu, Mehmet, 2017. "Geothermal energy in Turkey and around the World: A review of the literature and an analysis based on Turkey's Vision 2023 energy targets," Renewable and Sustainable Energy Reviews, Elsevier, vol. 76(C), pages 485-492.
    15. Zhu, Jialing & Hu, Kaiyong & Lu, Xinli & Huang, Xiaoxue & Liu, Ketao & Wu, Xiujie, 2015. "A review of geothermal energy resources, development, and applications in China: Current status and prospects," Energy, Elsevier, vol. 93(P1), pages 466-483.
    16. Wei, Xin & Feng, Zi-jun & Zhao, Yang-sheng, 2019. "Numerical simulation of thermo-hydro-mechanical coupling effect in mining fault-mode hot dry rock geothermal energy," Renewable Energy, Elsevier, vol. 139(C), pages 120-135.
    17. Sun, Zhi-xue & Zhang, Xu & Xu, Yi & Yao, Jun & Wang, Hao-xuan & Lv, Shuhuan & Sun, Zhi-lei & Huang, Yong & Cai, Ming-yu & Huang, Xiaoxue, 2017. "Numerical simulation of the heat extraction in EGS with thermal-hydraulic-mechanical coupling method based on discrete fractures model," Energy, Elsevier, vol. 120(C), pages 20-33.
    18. Zeng, Yu-Chao & Wu, Neng-You & Su, Zheng & Wang, Xiao-Xing & Hu, Jian, 2013. "Numerical simulation of heat production potential from hot dry rock by water circulating through a novel single vertical fracture at Desert Peak geothermal field," Energy, Elsevier, vol. 63(C), pages 268-282.
    19. Song, Xianzhi & Shi, Yu & Li, Gensheng & Yang, Ruiyue & Wang, Gaosheng & Zheng, Rui & Li, Jiacheng & Lyu, Zehao, 2018. "Numerical simulation of heat extraction performance in enhanced geothermal system with multilateral wells," Applied Energy, Elsevier, vol. 218(C), pages 325-337.
    20. Chamorro, César R. & Mondéjar, María E. & Ramos, Roberto & Segovia, José J. & Martín, María C. & Villamañán, Miguel A., 2012. "World geothermal power production status: Energy, environmental and economic study of high enthalpy technologies," Energy, Elsevier, vol. 42(1), pages 10-18.
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