Scale drillability maps as a tool to select the drilling technology to install Borehole Heat Exchange (BHE) probes

The main aim of EU funded project GEO4CIVHIC is the development, growth and spreading of more efficient and low-cost geothermal systems for conditioning retrofitting civil and historical buildings. Within this context, the assessment of the most suitable drilling technique to install borehole heat exchangers (BHE) is affected by the local geological, hydrogeological and thermal conditions. In order to provide professional (i.e. drillers, designers) and decision makers (i.e. building owners, policy makers) with preliminary information about expected drilling-time and costs for different geothermal systems, drillability maps at European and municipality scale are here presented.This work has been supported financially by the EU project GEO4CIVHIC, which is gratefully acknowledged by the author. The project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 792355REFERENCES