Bedretto Reservoir Project

Currently, the largest project at the Bedretto Lab is the Bedretto Reservoir Project. It encompasses three sub-projects with complementary targets for the development of a large-scale deep reservoir for the circulation of water and the storage and extraction of geothermal energy:

  1. VALTER
  2. DESTRESS
  3. ZoDrEx

The leaders of the SCCER-SoE, VALTER, DESTRESS and ZoDrEx projects decided to implement the parts of their projects that concern the Bedretto Lab in close collaboration. This allows them to optimize the use of resources and exploit synergies, for example the common use of monitoring systems, shared access to boreholes and reduced mobilization and installation costs (e. g. drilling).

Validation of Technologies for Reservoir Engineering (VALTER)

The project VALTER, funded by the Swiss Federal Office of Energy (SFOE), aims at demonstrating that a large rock volume can be stimulated to allow fluid circulation in significant quantities whilst keeping seismic risk under control. To achieve this, a high-resolution seismo-hydromechanical monitoring system in the boreholes and the tunnel helps to address the following questions:

  • What is the link between the stimulation concept, the hydro-mechanical response of the rock mass, and the creation of permeability and induced seismicity?
  • Which stimulation concept optimizes reservoir permeability and heat exchanger properties, while keeping seismicity at a reduced level?

Learn more about the VALTER project here.

Demonstration of soft stimulation treatments of geothermal reservoirs (DESTRESS)

The project DESTRESS, a Horizon 2020 project funded by the EU, aims at optimising stimulation treatments while minimising environmental impacts such as seismic events or pollution of groundwater reservoirs. The DESTRESS project is divided into seven work packages. Five will deliver technologies for prototype demonstration and two will demonstrate innovative stimulation treatments. The DESTRESS work in the Bedretto Lab targets the effectiveness of cyclic hydraulic treatments and of multi-stage stimulations.

Learn more about the DESTRESS project here.

Zonal Isolation, Drilling and Exploitation of EGS Projects (ZoDrEx)

The project ZoDrEx, funded by EU initiative Geothermica – Era Net, aims at demonstrating drilling, completion and production methods to increase the technical and economical chances of success in geothermal energy applications. At the Bedretto Lab, the project will focus on the performance of zonal isolation technologies and their potential importance during stimulations as well as on the fluid driven percussion drilling method in highly deviated trajectory boreholes to enhance drilling efficiency in crystalline rock.

The figure shows the experimental setup for the first experiment series at the Bedretto Lab combining the projects VALTER, DESTRESS and ZoDrEx in one experiment. The fracture and faults extrapolated from the tunnel are shown in map view for comparison.

Learn more about the ZoDrEx project here.

Zonal Isolation, Drilling and Exploitation of EGS Projects (ZoDrEx)

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Projects within the Bedretto Reservoir Project

  • VALTER
  • DESTRESS
  • ZoDrEx

Predecessor of the Bedretto Reservoir Project: Grimsel ISC