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Geothermal energy can help improve the energy mix and reduce carbon emissions. CO2 can be used as a heat exchange medium in the process of geothermal development, and at the same time, realize the geological storage of CO2. In this chapter, an enhanced geothermal system (EGS) with coupled thermal–hydraulic–mechanical (THM) containing discrete fractures is developed. Using the sensitivity analysis method, 13 formation parameters controlling the heat production performance of CO2−EGS were studied with thermal breakthrough time and net heat production rate as target parameters. It is found that the most important parameters affecting the heat production performance of CO2−EGS are matrix permeability and fracture aperture.

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Sensitivity Analysis of Stratigraphic Parameters on the Yield of CO2-Enhanced Geothermal Systems

  • 会议论文

  • 发表日期：

    2025年

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  • Bin Liu,
  • Chunyang Feng,
  • Kaiwen Hu

摘要

Geothermal energy can help improve the energy mix and reduce carbon emissions. CO2 can be used as a heat exchange medium in the process of geothermal development, and at the same time, realize the geological storage of CO2. In this chapter, an enhanced geothermal system (EGS) with coupled thermal–hydraulic–mechanical (THM) containing discrete fractures is developed. Using the sensitivity analysis method, 13 formation parameters controlling the heat production performance of CO2−EGS were studied with thermal breakthrough time and net heat production rate as target parameters. It is found that the most important parameters affecting the heat production performance of CO2−EGS are matrix permeability and fracture aperture.