| Abstract |
The current geothermal resources under exploitation for electric generation in Mexico are of hydrothermal type and contained beneath four geothermal fields with an installed capacity of 958 MW (883 MW as running capacity). These fields produced 6524 GWh of electric energy last year, contributing to 2.4% of the national electric output for public service. Based in some recent assessments, the Mexican geothermal electric potential of hydrothermal origin and temperatures higher than 150°C can be established in 2310 MW. Given its type and temperatures, this potential can be developed with conventional technology. Following the terms suggested by the Australian geothermal code and so reflecting a decreasing grade of confidence, this potential is composed of 125 MW as Proven Reserves in the four fields in operation, 245 MW of Probable Reserves in the same fields and in Cerritos Colorados, 75 MW of Measured Resources in Cerro Prieto, 655 MW of Indicated Resources in 19 identified geothermal zones and 1210 MW of Inferred Resources in another geothermal zones. The theoretical potential of EGS-type geothermal resources has not been yet estimated in Mexico, following the protocol endorsed by the IGA. However, the stored heat in Mexico down to 3 km depth can be assessed in 56,960 EJ at temperatures higher than 150°C, based on an old but reasonable study made at global level. This thermal energy is just a fraction of the total available, and represents a power potential of 5250 MW. |