Geothermal exploitation from depleted high temperature gas reservoirs via recycling supercritical CO2: Heat mining rate and salt precipitation effects

The geothermal energy in depleted high temperature gas reservoirs can be developed using existing wells and surface facilities via recycling water or supercritical CO2 after natural gas production. For a typical medium-size gas field, the recoverable geothermal energy can be equivalent to over 10 million tons of standard coal. The injection of CO2 can improve the heat mining rate, and it can also enhance gas recovery at the early stage of the...