For EGS projects, temperature is based on the reported resource temperature, or (if unavailable), the maximum bottom-hole temperature, or (if that’s also unavailable) the production temperature. For CLGS projects, it’s based on the reported reservoir temperature, or (if unavailable) the expected production temperature.

Project factsheets focus on projects that are at or approaching superhot rock temperatures, with an emphasis on findings relevant to geothermal in dry rock conditions.

The temperature modeling was developed by Clean Air Task Force in collaboration with the University of Twente. It gives a high-level estimate of regional superhot rock geothermal potential but should not be used as a prospecting tool. The Heat Endowment Methodology discusses the approach and methodology used to develop the temperature model. 450°C was selected as a target depth to provide a sufficient buffer and greater certainty that ultrahigh enthalpy fluids could be reliably produced for renewable energy generation, even after accounting for process heat loss and variations in geochemistry. Shallow thermal anomalies shown on the map are located at 5-7.5km depth.

Regional Assessments provide information about the potential of superhot rock geothermal to positively impact the energy system and economy of regions around the world.