TLS Geothermics initiated two exploration projects in France in 2015.

These two projects were the subject of applications for exclusive permits to explore for high-temperature geothermal deposits.

These applications were granted in October 2017.

These two permits are now shared with Storengy (Engie).


The Geopulse project is the result of a collaboration between TLS Geothermics and Storengy, a subsidiary of ENGIE, in the exploration and development of geothermal energy in the Massif Central.

The objective of the project is to build a deep geothermal power plant with an electrical power of 5 MW, thanks to the hot water naturally present between 3000 and 3600 meters deep.

To access this resource, two deep wells must be drilled.


  • Sioule-Miouze permit
  • Location: St-Pierre-Roche (Puy-de-Dôme, FR)
  • November 2021: start of construction
  • October 2022: drilling and testing
  • Plant in service: 2025
  • Depth of the deposit (vertical): 3000m
  • Expected temperature: 160 to 200°C
  • Required flow rate: 360 m3/hour
  • Electrical power: 6 MW (and up to 12 MW)
  • Annual production: 45 GWh (or 90)
  • Electricity for 9000 homes