Luxembourg's geothermal potential: first results of a study
Sandra Seitamaa, Unsplash
A recently completed seismic sounding campaign conducted by Ponts et Chaussées in collaboration with Smart Seismic Solutions has provided the first detailed data on the structure of Luxembourg's deep subsurface. The research covered three key geological profiles:
- Foetz - Burange (east-west direction)
- Esch-sur-Alzette - Dudelange (east-west)
- Bettambourg - Dudelange (north-south)
At depths ranging from 750 to 2,200 metres, scientists have discovered rocks consisting mainly of sandstone and conglomerates, materials known for their porosity and ability to hold water. Groundwater temperatures in these layers are predicted to be between 40 and 70°C, opening up the prospect of using these reservoirs for geothermal energy.
Underground sources with such temperatures can be part of a sustainable energy supply, e.g. for heating buildings or producing hot water. However, the key factor is sufficient permeability of the layers so that the water can circulate freely and provide a steady flow of heat.
The findings are an important step towards assessing the energy potential of Luxembourg's underground sources. If the high permeability of the rocks is confirmed, these geothermal reservoirs could be the basis for the introduction of clean technologies. This would reduce dependence on fossil fuels and increase the sustainability of the country's energy system.
Deep seismic scanning thus opens up new opportunities for Luxembourg to develop green energy and clean heat supply.
