Fig. 1
From: The risks of long-term re-injection in supercritical geothermal systems

Enhanced Supercritical Geothermal System. Schematic representation of a doublet system in an Enhanced Supercritical Geothermal System (ESGS), with pre-existing magmatic heat source that generates a convective hydrothermal circulation. A doublet system of injection/production alters the pressure and temperature fields, leading to potential fault instability