Dissolution evaluation of coquina part 2: Alternating carbonated brine and equilibrated brine injection using computed tomography and PHREEQC

Carbonated Water Injection for Enhanced Oil Recovery and CO2 Geosequestration in Different CO2 Repositories: A Review of Physicochemical Processes and Recent Advances

“…where k is the reaction rate (s −1 ). Vargas et al 107 reported extremely low Da values (0.0015−0.0344), which corresponded to excessive mineral dissolution. Wormholes were also generated as the coquina sample permeability increased from ∼600 to 3100 mD post-CWI.…”

“…Wormholes are highly porous and conductive channels, and the shapes depend on the rock heterogeneity, acid concentration, and core size. 107 A novel approach known as microcalorimetry has also been employed to investigate geochemical interactions between carbonated brine, formation fluids, and rock. 31 Microcalorimetry involves the utilization of heat production for inference of geochemical interactions.…”

“…Mineral surface structures at the atomic level are essential to understand dissolution processes and impurity adsorption. 107 These interactions between the mineral surface and the solution explain the formation of chemical bonds between solution ions and lattice-bound ions present on the mineral surface. Surface complexation models provide a descriptive framework for characterizing surface complexes.…”

“…Surface complexation models provide a descriptive framework for characterizing surface complexes. 107 This model facilitates the understanding of reactions occurring at the mineral-solution interface, defines surface species, chemical reactions, equilibrium constants, mass, and charge balance to enable the simulation of equilibrium conditions. 107 Surface complexation modeling (SCM) has been successfully deployed in a few investigations to comprehend the existing geochemical interaction between CW and formation fluids (brine and/or oil).…”

“…107 This model facilitates the understanding of reactions occurring at the mineral-solution interface, defines surface species, chemical reactions, equilibrium constants, mass, and charge balance to enable the simulation of equilibrium conditions. 107 Surface complexation modeling (SCM) has been successfully deployed in a few investigations to comprehend the existing geochemical interaction between CW and formation fluids (brine and/or oil). 107,124,175 The SCM technique is a quick and cost-effective method for predicting the wetting conditions of minerals and reservoir rocks.…”