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Determination of optimum parameters of doublet system in a horizontally fractured geothermal reservoir

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  • Chandrasiri Ekneligoda, Thushan
  • Min, Ki-Bok

Abstract

The parameters for the optimum production temperature of a geothermal well were determined by using both an analytical and convective conductive heat transfer numerical model. The numerical model was verified with the available analytical solutions. The production temperatures for different mass flow rate, number of fractures, fracture width, and production time were combined to obtain the minimum fracture length and the half spacing. The velocity profile in a single fracture was incorporated in the numerical model in deriving the minimum fracture length that allows for target production temperature. A nomogram solution is also presented for the evaluation of the production temperature that incorporates the mass flow rate, fracture width, fracture length, number of conductive fractures, host rock temperature, and the production time. The minimum fracture half spacing was investigated in order to prevent thermal interference between the fluid-carrying fractures by using the numerical model. The minimum fracture length is determined to be 600 m for maintaining 10% thermal drawdown after 10 years of production with 20 fractures when the mass flow rate and fracture width are 40 kg/sec and 100 m, respectively. The results from this study can provide a preliminary guideline to optimize the various design parameters involved in hydraulic stimulation and geothermal production in the EGS reservoir.

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  • Chandrasiri Ekneligoda, Thushan & Min, Ki-Bok, 2014. "Determination of optimum parameters of doublet system in a horizontally fractured geothermal reservoir," Renewable Energy, Elsevier, vol. 65(C), pages 152-160.
    • Handle: RePEc:eee:renene:v:65:y:2014:i:c:p:152-160
    DOI: 10.1016/j.renene.2013.08.003
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    1. Zhai, Haizhen & Jin, Guangrong & Liu, Lihua & Su, Zheng & Zeng, Yuchao & Liu, Jie & Li, Guangyu & Feng, Chuangji & Wu, Nengyou, 2023. "Parametric study of the geothermal exploitation performance from a HDR reservoir through multilateral horizontal wells: The Qiabuqia geothermal area, Gonghe Basin," Energy, Elsevier, vol. 275(C).
    2. 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.
    3. Kang, Fangchao & Li, Yingchun & Tang, Chun'an & Huang, Xin & Li, Tianjiao, 2022. "Competition between cooling contraction and fluid overpressure on aperture evolution in a geothermal system," Renewable Energy, Elsevier, vol. 186(C), pages 704-716.
    4. Hyrzyński, Rafał & Ziółkowski, Paweł & Gotzman, Sylwia & Kraszewski, Bartosz & Ochrymiuk, Tomasz & Badur, Janusz, 2021. "Comprehensive thermodynamic analysis of the CAES system coupled with the underground thermal energy storage taking into account global, central and local level of energy conversion," Renewable Energy, Elsevier, vol. 169(C), pages 379-403.
    5. Zhang, Chao & Jiang, Guangzheng & Jia, Xiaofeng & Li, Shengtao & Zhang, Shengsheng & Hu, Di & Hu, Shengbiao & Wang, Yibo, 2019. "Parametric study of the production performance of an enhanced geothermal system: A case study at the Qiabuqia geothermal area, northeast Tibetan plateau," Renewable Energy, Elsevier, vol. 132(C), pages 959-978.
    6. Olasolo, P. & Juárez, M.C. & Morales, M.P. & D´Amico, Sebastiano & Liarte, I.A., 2016. "Enhanced geothermal systems (EGS): A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 56(C), pages 133-144.
    7. Jiang, Peixue & Li, Xiaolu & Xu, Ruina & Zhang, Fuzhen, 2016. "Heat extraction of novel underground well pattern systems for geothermal energy exploitation," Renewable Energy, Elsevier, vol. 90(C), pages 83-94.
    8. Gao, Xuefeng & Zhang, Yanjun & Huang, Yibin & Ma, Yongjie & Zhao, Yi & Liu, Qiangbin, 2021. "Study on heat extraction considering the number and orientation of multilateral wells in a complex fractured geothermal reservoir," Renewable Energy, Elsevier, vol. 177(C), pages 833-852.
    9. Anna Wachowicz-Pyzik & Anna Sowiżdżał & Leszek Pająk & Paweł Ziółkowski & Janusz Badur, 2020. "Assessment of the Effective Variants Leading to Higher Efficiency for the Geothermal Doublet, Using Numerical Analysis‒Case Study from Poland (Szczecin Trough)," Energies, MDPI, vol. 13(9), pages 1-20, May.
    10. Cheng, Wen-Long & Wang, Chang-Long & Nian, Yong-Le & Han, Bing-Bing & Liu, Jian, 2016. "Analysis of influencing factors of heat extraction from enhanced geothermal systems considering water losses," Energy, Elsevier, vol. 115(P1), pages 274-288.
    11. Salimzadeh, S. & Grandahl, M. & Medetbekova, M. & Nick, H.M., 2019. "A novel radial jet drilling stimulation technique for enhancing heat recovery from fractured geothermal reservoirs," Renewable Energy, Elsevier, vol. 139(C), pages 395-409.
    12. Guo, Liang-Liang & Zhang, Yong-Bo & Zhang, Yan-Jun & Yu, Zi-Wang & Zhang, Jia-Ning, 2018. "Experimental investigation of granite properties under different temperatures and pressures and numerical analysis of damage effect in enhanced geothermal system," Renewable Energy, Elsevier, vol. 126(C), pages 107-125.
    13. 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.
    14. Abbasi, Mahdi & Mansouri, Mehrshad & Daryasafar, Amin & Sharifi, Mohammad, 2019. "Analytical model for heat transfer between vertical fractures in fractured geothermal reservoirs during water injection," Renewable Energy, Elsevier, vol. 130(C), pages 73-86.
    15. Chi Yao & Yulong Shao & Jianhua Yang, 2018. "Numerical Investigation on the Influence of Areal Flow on EGS Thermal Exploitation Based on the 3-D T-H Single Fracture Model," Energies, MDPI, vol. 11(11), pages 1-19, November.

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