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Geological and drilling aspects of construction and exploitation geothermal systems HDR/EGS

Sapińska-Śliwa A., Kowalski T., Knez D., Śliwa T., Gonet A., Bieda A

AGH Drilling, Oil, Gas

2015

Vol. 32, no. 1

49--63

The article presents an overview of developing unconventional geothermal systems, such as Hot Dry Rock Systems (HDR), where is used the heat of dry rock and enhanced system with smali water tributary called Enhanced Geothermal Systems (EGS). These systems provide utilization of geothermal energy in reservoirs (i.a. granites) where conventional methods are not possible to use. Operation HDR/EGS involves the use rock heating through warming medium, which flowing between the production and injection boreholes. In most cases medium introduced artifically by hydraulic fracturing. Currently, most of the projects HDR/EGS is in the implementation phase. Based on gathered materials an analysis of the construction and exploitation geothermal systems. Take into account geological and drilling aspects.