Skip to Main content Skip to Navigation
Journal articles

Modelling the Dissolution/Precipitation of Ideal Solid Solutions

Abstract : The kinetic behaviour of an ideal solid solution is modelled by two competing reactions: the stoichiometric dissolution of the existing solid and the precipitation of the least soluble compound, i.e. that with respect to which the oversaturation of the fluid is maximum; both reaction rates are expressed as a function of the corresponding departure from equilibrium, with a pH-dependent kinetic constant. Within this ideal model, the saturation curves and the fluid evolution of a simple reacting system may be displayed conveniently in chemical potential diagrams. The simulation of a geochemical system, constituted of a glauconitic sandstone aquifer infiltrated through by a sea water enriched in carbonates, allows to analyze the impact of taking into account two ferro-magnesian solid solutions, a calcite and a chlorite, on Fe-Mg exchanges during carbonates dissolution. The model accounts well for the tendency of solid solutions to dissolve congruently before precipitation starts and drives the fluid composition towards equilibrium.
Complete list of metadata

Cited literature [34 references]  Display  Hide  Download
Contributor : Andrée-Aimée Toucas Connect in order to contact the contributor
Submitted on : Wednesday, February 13, 2019 - 9:36:01 AM
Last modification on : Tuesday, May 3, 2022 - 9:08:03 PM
Long-term archiving on: : Tuesday, May 14, 2019 - 3:07:05 PM


Publication funded by an institution



E. Nourtier-Mazauric, Bernard Guy, B. Fritz, E. Brosse, Daniel Garcia, et al.. Modelling the Dissolution/Precipitation of Ideal Solid Solutions. Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, Institut Français du Pétrole (IFP), 2005, 60 (2), pp.401-415. ⟨10.2516/ogst:2005024⟩. ⟨emse-00613150⟩



Record views


Files downloads