| Abstract |
The South Hungarian EGS Demonstration Project aims to produce 8.9 MWe net power with inlet temperature of 170 °C. The location of project is Békés county, in the vicinity of town of Mezőkovácsháza. The area is along the Battonya-Pusztaföldvár Ridge, where crystalline rocks consists of granite, granodiorite, gneiss, serpentinite, mylonite and quartzite. The targeted formation is poorly explored, and certain drilling risks are associated with overpressure and loss zones. A temperature model was developed based on the temperature data of deep wells. The targeted 170-180 °C is located at 2900-3125 m depth range. By the interpretation of available 3D seismic data set a targeting approach method was developed. The method is built on indication of homogeneity of rocks, the final well site is on an intermediate level of homogeneity. The present well design takes into consideration the associated drilling risks, the planned stimulation activities and the protection of groundwater resources. There are no well bore stress measurements in the basement in the vicinity of the well. The stress regime and principle directions can be inferred from earthquake focal mechanisms. For multi-zone stimulation AltaRock’s TZIM Technology will be used. The expected date for drilling of first EGS well is autumn of 2016 |