Mechanistic Modelling of Water-Alternating-Gas Injection and Foam-Assisted Chemical Flooding for Enhanced Oil Recovery

History-matching of core-flood experimental data through numerical modelling is a powerful tool to get insight into the relevant physical parameters and mechanisms that control fluid flow in enhanced oil recovery processes. We conducted a mechanistic numerical simulation study aiming at modelling previously performed water-alternating-gas and foam-assisted chemical flooding core-flood experiments. For each experiment, a one-dimensional model was built. Obtained CT scan data was used in order to assign varying porosity, and permeability, values to each grid block. The main goal of this study was to history-match measured phase saturation profiles along the core length, pressure drops, produced phase cuts, and the oil recovery history for each of the experiments conducted. Results show that, in order to obtain a good match for the water-alternating-gas experiment, gas relative permeability needed to be reduced as function of injection time due to gas trapping. The surfactant phase behaviour, for the aid of ...