An information board has been installed at the site of the Velika Gorica geothermal site in Croatia, marking the start of the drilling work for the VGGT-1 geothermal well. Drilling is expected to commence by mid-December and continue until July 2025.

The VGGT-1 well will be drilled vertically to a target depth of 2900 meters, with the possibility of deepening by an additional 20 meters. Two reservoirs are expected to be intersected by the well – one at 2020 meters, and another at 2770 meters. Expected temperatures of the geothermal waters is at 90 °C.

Exploration activities at the Velika Gorica preliminary exploration area are being carried out as part of the project “Development of geothermal potential for heating needs” which is financed by the National Recovery and Resilience Plan (NRRP). The project aims to increase the contribution of renewable energy sources, and specifically geothermal, in the country’s heating sector.

Earlier this year, the Croatian Hydrocarbon Agency (AZU) awarded the contract for geothermal well drilling at the Velika Gorica, Zaprešic, Osijek, and Vinkovci to Crosco. The company had previously been involved in geothermal drilling at the Veliko Koronevo and Ernestinovo sites.