Exploration of Deeper (2-5 km) Geothermal Energy Resources in Hungary

Abstract

The exploration of deep geothermal resources in a sedimentary basin requires new concepts. From a geological point of view, different approaches are needed in the cases of fractured carbonate and sandstone rocks. In carbonate rock, the main challenge is the determination of production well locations, while in sandstone, the most exciting question is reinjection. With respect to thermal energy, the optimal depth must be determined in every site where the temperature is high enough and there is still an appropriate thermal water flow-rate. In the Pannonian Basin, the geothermal exploration of deeper resources is in its early stages. However, MOL and its international affiliate, CEGE Ltd., have several years of experience in this field. The results of this geothermal exploration activity are described here.