Reactive Transport Modelling of Dissolved CO2 Injection in a Geothermal Doublet. Application to the CO2 -DISSOLVED Concept

Christelle Castillo (1) , Nicolas C.M. Marty (1) , Virginie Hamm (1) , Christophe Kervévan (1) , Dominique Thiéry (1) , Louis de Lary de Latour (1) , Jean-Charles Manceau (1)

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

This project aims at assessing the feasibility of the CO2-DISSOLVED concept, combining injection of dissolved CO2 and recovery of the geothermal heat. The objective here was to identify and to quantify the thermo-hydro-geochemical processes induced by a massive injection of dissolved CO2 into a carbonated aquifer and a clastic reservoir. For that purpose, several simulations were performed using the MARTHE-PHREEQC and MARTHE-REACT reactive transport codes. Simulation results corroborate the expected great reactivity of the carbonated reservoir under the injection of CO2-rich brine. Numerical results provide new arguments confirming the feasibility of the CO2-DISSOLVED approach.

Domaines: Planète et Univers [physics]; Sciences de la Terre; Hydrologie; Planète et Univers [physics]; Sciences de la Terre; Géochimie

Christelle Castillo, Nicolas C.M. Marty, Virginie Hamm, Christophe Kervévan, Dominique Thiéry, et al.. Reactive Transport Modelling of Dissolved CO2 Injection in a Geothermal Doublet. Application to the CO2 -DISSOLVED Concept. 13th International Conference on Greenhouse Gas Control Technologies, GHGT -13, Nov 2016, Lausanne, Switzerland. pp.4062 - 4074, ⟨10.1016/j.egypro.2017.03.1547⟩. ⟨hal-01599198⟩