CO 2 -Vadose and DEMO-CO 2 Projects: Two Complementary Projects about Geochemical and Geophysical Monitoring During CO 2 Leakage

B. Garcia (1) , K. Rhino (2) , C. Loisy (2) , O. Le Roux (2) , Adrian Cerepi (2) , V. Rouchon (1) , S. Noirez (1) , C. Le Gallo (1) , Ph. Delaplace (1) , O. Willequet (3) , C. Bertrand (4)

1 IFPEN - IFP Energies nouvelles
2 ENSEGID - Géoressources & Environnement
3 Dimelco SA
4 ALGADE

From a natural underground cavity and two locations situated in a well, three CO 2 injections have been designed and performed under controlled conditions in order to study its migration along the carbonate vadose zone and to test geochemical and geophysical techniques. After the understanding of the natural CO 2 dynamics and the establishment of a baseline, some numerical simulations have been performed to help to optimize the monitoring strategy (spatially and temporally). A mixture of CO 2 + noble gases has been injected and the results show that CO 2 subsurface leakage can be anticipated thanks to these inert chemical gases used as tracers (He + Kr).The geochemical and geophysical monitoring approaches are very complementary.

Mots clés: CO2; noble gases; inert gas; geochemical and geophysical monitoring; numerical simulations; carbonate vadose zone

Domaines: Sciences de la Terre

B. Garcia, K. Rhino, C. Loisy, O. Le Roux, Adrian Cerepi, et al.. CO 2 -Vadose and DEMO-CO 2 Projects: Two Complementary Projects about Geochemical and Geophysical Monitoring During CO 2 Leakage. Energy Procedia, 2017, 114, pp.3695 - 3698. ⟨10.1016/j.egypro.2017.03.1500⟩. ⟨hal-01739930⟩