CO2 injection at the Mont Terri Underground Rock Laboratory

03/28/2014
CO2 injection experiment in the Mont Terri Underground Rock Laboratory, Switzerland

An innovative experiment is being carried out under ULTimateCO2 to reconstruct a well environment including all the essential features (caprock/cement/casing/cement compartments) in the Mont Terri Underground Rock Laboratory, Switzerland, in order to control and follow closely the evolution when brought into contact with CO2. The experiment will provide for the first time a fine monitoring of reactive flow percolating through casing / cement / clay interfaces  with a perfect control of pressure drop and the monitoring of the chemical changes of the fluids thanks to a regular sampling.

Injection of CO2 began in early 2014, and the monitoring system is now ready for measurements. The results will serve to define scenarios of CO2 leakage looking at the basin scale.

The experiment steps:CO2 injection at the Mont Terri Underground Rock Laboratory, Switzerland

  1. building of a typical environment (low permeable formation representing the caprock, the cemented annulus, the casing and the cement plug);
  2. characterization of the initial geochemical and hydraulic properties of the system;
  3. ⇒ injection of CO2-rich fluids in the experimental apparatus;

  4. monitoring of  geochemical and transport properties of the different materials of the experimental apparatus;
  5. retrieval of solid and fluid samples from the experimental apparatus for multiple analyses in the laboratory.

Dernière mise à jour le 12.06.2014