The Geological Research Center GTK has successfully drilled a medium-depth geothermal well in Kotka, which marks a milestone as it is the first time they have drilled a well deeper than 800 meters in the Kymenlaakso region. Project manager Annu Martinkauppi expressed that their expectations have been met exceedingly well, as the drilling faced no difficulties and the temperature levels of the rock matched their predictions. Medium-depth geothermal wells typically range from 600 to 2000 meters in depth.

The impressive aspect of this drilling project is not only the depth achieved but also the thermal conductivity of the surrounding rock, which turned out to be approximately 10% better than initially estimated. This improvement significantly enhances the well's capacity to generate heat, with one medium-depth geothermal well being capable of providing heating for about 5 to 7 single-family homes annually, according to Martinkauppi. This development indicates a promising future for geothermal energy utilization in the region, potentially offering a more sustainable heating solution.

This drilling initiative is part of the Geoenergialoikka project, which involves collaborations between GTK and the South-Eastern Finland University of Applied Sciences, Xamk. One of the project's goals is to explore the applicability of medium-depth geothermal wells for geothermal energy production, thus positioning the Kymenlaakso region as a key player in harnessing geothermal resources. The positive results from this project could pave the way for wider adoption of geothermal technology in addressing heating needs in Finland.