Aalborg-1: Drilling Denmark's Longest Geothermal Well

Green Therma, in collaboration with Aalborg Forsyning and project partners, is developing the Aalborg-1 deep geothermal project at Storvorde, north of Aalborg, Denmark.

Supported by an €11.5 million grant from the Danish Energy Technology Development and Demonstration Programme (EUDP), the project plans to drill a 7 km enclosed-loop geothermal well, with drilling scheduled to commence in late 2026 and heat delivery to Aalborg Forsyning's district heating network planned for 2027.

The well uses a patented co-axial enclosed-loop design with a vacuum-insulated inner pipe that functions similarly to a thermos flask, minimising heat loss as the heated fluid returns to the surface.

The planned well comprises approximately 4.5 km of vertical section followed by a 2.5 km deviated section and draws on drilling technologies and experience developed within the oil and gas industry.

The webinar will take participants through the story behind Aalborg-1, the well concept, the planned drilling operation and the technical challenges associated with constructing a 7 km geothermal well in Denmark.

It will also explore whether enclosed-loop technology can contribute to making geothermal energy more scalable and deployable across a wider range of geological settings, and what can be learned from applying established oil and gas drilling technologies to a new generation of geothermal wells.

About the Speakers

Kim Gunn Maver – Chief Geologist, Green Therma

Kim Gunn Maver holds a PhD in Geology and an MBA and has 35 years of experience in the oil and gas industry. He is one of the founders of Green Therma.

Over the past four years, he has published numerous papers and delivered presentations on geothermal energy and the development of new geothermal solutions.

www.greentherma.com

Mads Sylvest Eegholm – Project Manager, Green Therma

Mads Sylvest Eegholm holds an MSc in Geology and has extensive experience from both the oil and gas and offshore wind industries. He is the Project Manager responsible for the execution of the Aalborg-1 geothermal project.

About the Webinar Series

This webinar is part of a series of geothermal webinars initiated by Søren Weiss Hartmann, Drillconsult, in collaboration with IDA Energy, SPE Copenhagen Section and IADC.

The series focuses on geothermal drilling, technology, lessons learned, and opportunities to develop a more scalable geothermal industry in Denmark.

The webinars are being held in the lead-up to the IADC Geothermal Drilling Conference & Exhibition in Copenhagen in November 2026.

Explore the other Webinars in the Series

Aalborg-1: Drilling Denmark's Longest Geothermal Well - Green Therma

From Resource to Reality – Drilling Europe’s Geothermal Growth - Rystad Energy

De-Risking Geothermal: From Opportunity to Production - Ross Energy

Unlocking Denmark’s Geothermal Potential - GEUS

Webinar Coordination

For any questions regarding this webinar or the webinar series, please contact: Søren Weiss Hartmann, Drillconsult  mail@drillconsult.dk

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