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<p>Geothermal energy is widely regarded as an environmentally friendly, clean, and renewable energy source. The widespread application of geothermal energy has become feasible with the rapid development of enhanced geothermal systems (EGS), which holds significant importance for addressing energy demands and achieving the goals of carbon peak and carbon neutrality. In this study, by integrating the geological structures of the Cooper Basin in Australia with microseismic records induced by hydraulic fracturing, two models are established: (1) a 3D zonal model with homogeneous permeability; and (2) a 3D model with heterogeneous permeability. Both models are calibrated to the results of a closed-loop test. Subsequently, fluid flow and heat transfer processes in various EGS configurations are simulated and a sensitivity analysis is performed to investigate the parameters affecting system performance. Due to hydraulic fracturing, the permeability of the reservoir increases and the connectivity between wells is significantly enhanced. The simulation results show that injection temperature, injection-production pressure difference and injection-production well spacing significantly affect thermal breakthrough and thermal energy recovery. This study can be applied to support the sustainable development and utilization of hot dry rock resources, providing more refined guidance for the design and operation of EGS projects.</p>

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Numerical simulations and analysis of enhanced geothermal reservoir parameters and thermal recovery based on microseismic data in the Cooper Basin, Australia

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Guodong Jin,
  • Jianchao Wang,
  • Zihan Ma,
  • Kunpeng Shi,
  • Yuyang Tan,
  • Weichao Yan,
  • Huilin Xing

摘要

Geothermal energy is widely regarded as an environmentally friendly, clean, and renewable energy source. The widespread application of geothermal energy has become feasible with the rapid development of enhanced geothermal systems (EGS), which holds significant importance for addressing energy demands and achieving the goals of carbon peak and carbon neutrality. In this study, by integrating the geological structures of the Cooper Basin in Australia with microseismic records induced by hydraulic fracturing, two models are established: (1) a 3D zonal model with homogeneous permeability; and (2) a 3D model with heterogeneous permeability. Both models are calibrated to the results of a closed-loop test. Subsequently, fluid flow and heat transfer processes in various EGS configurations are simulated and a sensitivity analysis is performed to investigate the parameters affecting system performance. Due to hydraulic fracturing, the permeability of the reservoir increases and the connectivity between wells is significantly enhanced. The simulation results show that injection temperature, injection-production pressure difference and injection-production well spacing significantly affect thermal breakthrough and thermal energy recovery. This study can be applied to support the sustainable development and utilization of hot dry rock resources, providing more refined guidance for the design and operation of EGS projects.