Synergy of microcalorimetry and zeta potential measurements to study chalk-brine interactions

The nature of the solid-liquid interface involves ion adsorption from aqueous solution. The main partial processes that take place at the interface are: 1) electrical attractions between ions and the mineral lattice that lead to the formation of an electrical double layer. 2) different coordination reactions with the solution species at the protonated anion surface sites (>CO₃H⁰⁾ and hydroxylated cation sites (>CaOH^0). Those processes should be characterized in an accurate and efficient manner in order to describe the rock-fluid interactions at the interface. The aim of this study was to elucidate those interactions through isothermal titration calorimetry (ITC) and electrophoretic mobility measurements (zeta potential measurements). The synergy of both techniques open new perspectives regarding the interfacial phenomena at the calcite-aqueous interface. The data reported in this study has a wide application and significance for enhanced oil recovery purposes.