Exploration begins for Ostvogtland geothermal heat project
Exploration efforts started (source: copyright Ostvogtland Wärme)
Alexander Richter
10 Mar 2025
Geothermal firms TLS Geothermics and Kalyosphere begin exploration for the Ostvogtland geothermal heating project in Saxony, Germany.
As reported by our German partners at TiefeGeothermie.de, the Ostvogtland geothermal project, located in the Vogtland district of Saxony, that aims at the utilization of geothermal energy for regional heating solutions has started exploration efforts. This initiative aligns with Germany’s broader efforts to transition to renewable heating and reduce reliance on fossil fuels.
The exploration phase, now underway, includes geological surveys and preliminary drilling to assess the underground conditions for geothermal heat extraction. Experts will evaluate the thermal and structural properties of the subsurface to determine the feasibility of deep geothermal utilization. Following the exploration phase, detailed analysis will guide the project’s next steps, including drilling and infrastructure planning. If successful, the geothermal plant could significantly contribute to the region’s heating supply, supporting both residential and industrial needs.
The project is backed by two experienced geothermal energy firms from France: TLS Geothermics and Kalyosphere. The kickoff event saw key figures from the industry participating in the ceremonial groundbreaking, including Sébastien Delannoy from TLS Geothermics and Gitta Wahl from Bestec, the company responsible for coordinating the geological surveys.
According to Mathieu Auxietre, CEO of TLS Geothermics, investing in this technology is not only about reducing CO? emissions but also about strengthening energy security, fostering economic growth, and creating local jobs. Nicolas Dall’asta, a geologist at TLS Geothermics, highlighted Saxony’s promising geological conditions for geothermal energy, emphasizing that initial studies indicate strong potential in the Auerbach region.
Alain Rabaute, geologist at Kalyosphere, explained that state-of-the-art geophysical and geological survey techniques are being used to evaluate underground conditions, all while adhering to the highest environmental and safety standards.
The exploration area spans nearly 850 square kilometers, covering parts of the Vogtlandkreis, Erzgebirgskreis, and the Zwickau district. Over 250 measurement points have been designated for geophysical studies. Special sensors, embedded 30 centimeters into the ground, will collect data over the next one to two months to analyze geological structures. These non-intrusive “silent measurements” assess natural ground vibrations as well as electrical and magnetic fields, ensuring no disruptions to local communities or the environment.
Jens Scharff, Mayor of Auerbach, expressed strong support for the project, emphasizing that leveraging local geothermal resources could provide long-term energy security for the region.
The data collected from this phase will be analyzed over the coming months, determining the next steps for deep geothermal development in the Ostvogtland region. With the involvement of experienced companies, strong local backing, and the use of cutting-edge technology, this project represents a significant step toward sustainable heating in Saxony.
Source: Our German partner website TiefeGeothermie.de
