Characteristics of geothermal reservoirs in the Upper Rhine Graben of Baden-Wurttemberg and France

The project entitled aEurozDevelopment of an Internet Based Geothermal System for Germany includes the design of a geothermal information system for the deep hydrogeothermal resources of Germany. For the first time, hydraulic data from the entire Upper Rhine Graben in Baden-Wurttemberg and France were collected and interpreted. They give hydraulic conductivities in the geothermal reservoirs of the Hauptrogenstein, Oberer Muschelkalk and Buntsandstein. The mean value of the Hauptrogenstein south of Freiburg is T/H = 1,8 center dot 10(-6) m/s, and the Oberer Muschelkalk average is T/H = 2,0 center dot 10(-6) m/s. For the Buntsandstein, the hydraulic conductivity is T/H > 2,4 center dot 10(-7) m/s. Estimated hydraulic conductivities derived from productivity indices and permeability data are used for further comparative considerations.