Pore-Scale Study of Calcite Dissolution During CO2-Saturated Brine Injection for Sequestration in Carbonate Aquifers

Pore-Scale Study of Calcite Dissolution During CO2-Saturated Brine Injection for Sequestration in Carbonate Aquifers

Qiuheng Xie, Wendong Wang, Yuliang Su, Han Wang, Zhouyuan Zhang, Wubin Yan

Calcite reacts with CO2-saturated brine to form a divalent ion, which would have a great impact on mineral trapping. To further investigate the mechanism of calcite dissolution, the pore-scale reactive dynamics model based on lattice Boltzmann method was established. The results indicate that the effect of injection rate on dissolution reaction may decrease when ambient temperature is higher. Furthermore, the change in normalized permeability of porous media and dissolved calcite node under different temperature and injection rate is also elaborated. The outcomes in this contribution provide a theoretical guideline to potential estimation of CO2 sequestration and optimization of aimed sites.

Gas Science and Engineering Volume 114, June 2023, 204978
Corresponding Author: Wendong Wang

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