CO2 -DISSOLVED: a Novel Concept Coupling Geological Storage of Dissolved CO 2 and Geothermal Heat Recovery – Part 4: Preliminary Thermo-Hydrodynamic Simulations to Assess the CO2 Storage Efficiency

Virginie Hamm (1) , Christophe Kervévan (1) , Dominique Thiéry (1)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

The CO2 -DISSOLVED project aims at assessing the technical-economic feasibility of coupling CO2 storage in a saline aquifer and geothermal heat recovery. The proposed infrastructure basically relies on a standard geothermal doublet where CO2 would be injected after having been entirely dissolved in the cooled brine. The objective of this preliminary thermo-hydrodynamic modeling study was to quantify the expected CO 2 storage lifetime and efficiency. The results first confirmed that CO2 will inevitably be produced in the extracted brine after 2-15 years of continuous injection, depending on the operating parameters. However, mass balance calculations evidenced that after a 30 year injection period, 37-85% of the total CO2 injected should remain stored in the aquifer.

Mots clés: saline aquifer; thermo-hydrodynamic modeling; storage efficiency; CO2 storage; dissolved CO2; geothermal energy

Domaines: Sciences de la Terre

Virginie Hamm, Christophe Kervévan, Dominique Thiéry. CO2 -DISSOLVED: a Novel Concept Coupling Geological Storage of Dissolved CO 2 and Geothermal Heat Recovery – Part 4: Preliminary Thermo-Hydrodynamic Simulations to Assess the CO2 Storage Efficiency. 12th International Conference on Greenhouse Gas Control Technologies, GHGT-12, Oct 2014, Austin, United States. ⟨10.1016/j.egypro.2014.11.488⟩. ⟨hal-01093098⟩