Upon injection into a reservoir, CO2 migrates and interacts with the host rock and pore water (Benson et al. 2005, 2012). Supercritical or gaseous CO2 dissolves in the pore aqueous solution as a function of the pressure, temperature, and salinity conditions. This process changes the local chemistry; in that it significantly decreases the pH and promotes geochemical reactions such as the dissolution of primary minerals and precipitation of secondary phases. These reactions then alter the porous network and can have a significant feedback on the migration of fluids (water and gas) in the reservoir. In...

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