This study proposes a model for the kinetics and hydrodynamics of gypsum scale deposition on surfaces of anhydrite, calcite, dolomite, and sandstone rocks while interacting with the brines of 3000 and 6000 mg/L Ca2+ at 363 K and 1 atm. To do so, this study utilizes the surface energy characteristics of an interacting scale-brine-rock system as well as the geochemical interactions between brine-brine and brine-rock. The results showed that the deposition flux decreases steeply over time, followed by asymptotic propensity as time elapses. A higher degree of salinity in terms of Ca2+ increases the deposition flux as much as 2.9 fold for the flowing velocity of 10(-6) m/s and 2.4-fold for a velocity of 10(-5) m/s. Moreover, higher flow velocity would lead to more deposition on sandstone followed by carbonate and anhydrite rocks: similar to 2.6-fold for the salinity of 3000 mg/L and 2.2-fold for 6000 mg/L Ca2+.
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