Simulation of geothermal reinjection processes

Abstract

Currently efficient re-injection in sandstone reservoirs located in the Pannonian Basin is practiced on limited scale due to restricted design/demonstration experience in the area. The selected sites are located in SE Hungary and thus, from a geological point of view, in the central part of the Pannonian Basin, a group of lowlands and subdued mountains framed by the Carpathian arc, the Eastern Alps, and the Dinarides. The geothermal fluids are produced from the Upper Pannonian sandstone reservoir. The numerical simulation exercise carried out (using TOUGH2) focused on the hydraulic and thermal behaviour of the area interfacing the wellbore with the reservoir, in order to provide some ideas required to develop the filter area between the wellbore and the reservoir.