Tracking and CO2 leakage from deep saline to fresh groundwaters: Development of sensitive monitoring techniques

Pauline Humez (1) , Pascal Audigane (1) , Julie Lions (1) , Philippe Négrel (1) , Vincent Lagneau (2)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 GEOSCIENCES - Centre de Géosciences

In a predictive approach goal and to focus this work on risk assessment related to CCS context, a modeling study of an unfavorable scenario in which CO 2 leakage (willfully provoked) through an abandoned well, from a deep saline aquifer to fresh groundwater was developed. This 3D numerical model handles both fluid-rock geochemical interaction in the storage aquifer and impacted aquifer (code TOUGHREACT). In a second part and in the frame of studying, the use of multi-isotope approaches, like an isotopic monitoring opportunity, is developing in order to detect CO 2 leakage and to record geochemical processes of water quality evolution, induced by the lowering of the pH due to the ingress of CO 2 in the system. The case of study applies to the French Paris Basin.

Mots clés: reactive transport modeling; water quality; isotopic monitoring opprotunities; CO2 geological storage; CO2 leakage

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

Pauline Humez, Pascal Audigane, Julie Lions, Philippe Négrel, Vincent Lagneau. Tracking and CO2 leakage from deep saline to fresh groundwaters: Development of sensitive monitoring techniques. Energy Procedia, 2011, 4, pp.3443-3449. ⟨10.1016/j.egypro.2011.02.269⟩. ⟨hal-03652271⟩