Over two years and a half, about 45,000 tons of CO2 have been injected in the depleted Mano reservoir of Rousse field, in the south-west of France. In order to study the mineral reactivity of this storage, a laboratory-scale CO2-exposure 24 months-long experiment was conducted on reservoir rock samples at in situ temperature and pressure conditions. Periodic rock sampling and microprobe elementary maps allowed the identification of main mineralogical transformations. Fluid composition was regularly analyzed and used in numerical speciation calculations. The combination of experimental characterization and batch simulations allowed the proposition of a reaction path and evidenced potential CO2 mineralization.


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