Simulations of the Impact of Co-injected Gases on CO 2 Storage, the SIGARRR Project: Processes and Geochemical Approaches for Gas-water-Salt Interactions Modeling

International audienceThe composition of the captured CO 2 mixture may considerably vary both qualitatively and quantitatively depending on the sources, the selected technologies for purification... Many other compounds could be co-captured at various concentration levels and their potential co-storage along with CO 2 could be considered. Since these compounds may change the behavior of the CO 2 rich mixture, operators of the whole CCTS chain therefore wait for Jerome Corvisier et al. / Energy Procedia 114 (2017) 3322-3334 3323 clear recommendations in terms of admissible concentration levels for the various co-injected impurities while regulators need tools allowing them to formulate these recommendations. The SIGARRR project aims at conducting precise geochemical simulations to model the long-term behavior of co-injected gases within CO 2 storage sites based on a combination of experimental and numerical approaches, to ensure the reliability of numerical simulations. Within this context and the recent improvements in both processes and geochemical codes, this paper presents the water solubility precise calculations for CO 2 and most of the potential impurities N 2 , O 2 , Ar, CO, H 2 S, SO 2 , CH 4 , H 2 and the brine solubility relatively accurate geochemical simulations for CO 2 , N 2 , O 2 and CH 4 as well