The project will demonstrate the insulation performance the insulation performance of the DualVac™ completion in our Heat4Ever™ solution, ensuring minimal energy loss during heat transport from +3 km underground to the surface.
The project integrates the DualVac™ completion assembly into the well, sustaining high thermal performance along the full +3 km depth.
The well performance results will provide further development and position Heat4Ever™ for larger-scale deployment and commercial adoption in the geothermal heating sector.
The project also explores the direct use of geothermal heat for district heating, demonstrating its potential for sustainable urban energy supply.
The well was investigated suitable for the project in mid 2025, and the well is scheduled to be fully operational in early 2026. The project will run for one year to demonstrate various well performance conditions.
The project is conducted in collaboration with GFZ (GFZ Helmholtz-Zentrum für Geoforschung) at the Gross Schönebeck research site, Germany.
Green Therma leads the development and system integration, supported by GFZ’s geothermal expertise and testing facilities.
The well is drilled using the same method as is used in oil drilling. A drilling rig with a 40-meter-high derrick is set up. In terms of area, the fenced site occupies about the same space as a football field. The “drill” that performs the well drilling is located in the derrick. The well has a diameter of approximately 1 meter at the surface. Drilling is carried out in sections, with each section gradually decreasing in diameter with depth. The drilling itself reaches 4–5 km of depth, with a horizontal stretch of 2–3 km. The drilling takes about three months and is conducted around the clock.
In addition, equipment needs to be transported to and from the site, and pipes need to be installed to connect the new facility to the district heating network.
Overall, establishing the well will take approximately six months if everything proceeds according to plan.
Drilling the well takes about three months. The full construction period with site activity will last about six months.
We expect the facility to be completed in 2027.
Before the well can be drilled, we need to conduct seismic surveys in the area around Storvorde. Small trucks will drive around on the roads and send pressure waves into the ground. This may be briefly noticeable. Each truck only passes the same spot once.
During the drilling phase, the construction site will experience increased traffic with trucks and large machinery.
Drilling the well is going to cause noise and possibly minor vibrations, without any risk to the surrounding buildings. Green Therma will work with the rig owner to explore options for soundproofing the components that are the primary sources of noise. Green Therma will involve the affected residents to examine possibilities for temporary noise barriers, soundproofing bedrooms, relocation, etc.
In addition, there will be lighting on the construction site. Drilling takes place over three months, and work on the site continues around the clock.
Green Therma’s project manager, Mads Sylvest Eegholm
