Geothermal energy in Lower Saxony: First drilling in Ahnsbeck promising

Geothermal energy in Lower Saxony: First drilling in Ahnsbeck promising

Researchers at the University of Göttingen have made promising progress in the field of geothermal energy in Lower Saxony. Near Ahnsbeck in the Celle district, experts from the Baker Hughes company took a 2,500 meter deep drill core from the Rhät sandstone. This well is considered the first successful geothermal well in Lower Saxony and is part of the DemoCELL project, which is under the patronage of the Federal Ministry for Economic Affairs and Energy. The aim is to investigate the geothermal usability of the region to supply the surrounding area with geothermal energy.

The drilling work took place over an area of ​​two hectares. The special drilling technology made it possible to bring the drill core to the surface without losses. Dr. Matthias Franz, one of the lead researchers, is optimistic about the results, which so far indicate that the conditions for a usable geothermal reservoir are met. The 44 meter thick sandstone layer is sufficiently permeable to water, which increases the chances of future geothermal development.

Geothermal energy in Lower Saxony

The medium-deep subsurface in northern Germany offers a number of sandstone horizons that are used for geothermal purposes. The DemoCELL joint project is specifically investigating whether geothermal energy can be developed in Celle. The Middle Rhät sandstone, which is already used successfully in other cities such as Waren and Neustadt-Glewe, is a central element here. There are plans to establish Celle as a third location for geothermal use.

The Rhätsandstein lies at a depth of around 2,400 to 2,500 meters. So far, drilling has reached a depth of 2,390 meters. In order to ensure the stability of the borehole, the unstable layers above must first be secured. This includes preparatory work such as installing a pipe line to support the borehole as well as further drilling measures.

Technology and methodology

The drilling system in Ahnsbeck is optimized for the special requirements of geothermal energy and has one of the strongest European systems for extremely deep drilling. In view of the specific geological requirements, the plant carries out the work in 24-hour operation. The drill cores are examined to evaluate the storage properties and water permeability of the sandstone. A planned pump test as a hydraulic performance test is intended to provide further information about the reservoir.

The surveys carried out so far have proven to be crucial for the future geothermal development of the area. Geothermal energy could not only enable a more sustainable energy supply, but also make a significant contribution to reducing CO2 emissions. In Germany, this potential has so far been used comparatively little, which makes future projects all the more relevant. Currently, geothermal energy could potentially meet human energy needs by 2.5 times, further reinforcing the importance of this project.

In-depth research in geothermal energy, such as the DemoCELL project, could not only contribute to a modern energy supply, but could also be seen as an important step towards a more sustainable future. Further developments in this direction are eagerly awaited.

For more information about geothermal energy in Germany and its applications please read EnBW, where various aspects of geothermal energy use are explained in detail. Also Energy research comprehensively explains how geothermal development is progressing and what steps are being taken to establish Lower Saxony as a top location. You can also find out more on the website University of Göttingen about the latest research activities on geothermal potential in the region.