CO2 injections in brine aquifers would modify strongly the physic and the chemistry of the host aquifer affecting mainly the calcite precipitation kinetics. Although many geological system can be described using thermodynamic concepts and principles, the factor governing their fate and evolution can only be understood if the kinetics and mechanisms of reactions are well known. One of the most crucial problems in the application of carbonate fluid-rock interactions remains the function describing the variations of the precipitation rate. We developped an inversion model to establish an overall kinetic rate law allowing to describe the calcite precipitation rate as a function of temperature, partial pressure of CO2, salinity, specific constituents activity and carbonate ion concentration.
展开▼
