The effect of interfacial tension of ASP system on the initial migration of film-like microscopic residual oil

Abstract

Use glass etching microscopic visualization model to carry out oil displacement experiment to detect the interfacial tension and viscoelasticity of the ASP system with different surfactant concentrations. By recording dynamic images during the displacement process, the effect of interfacial tension on the initiation of the film-like residual oil migration was studied. The results show that under the condition of the same concentration of polymer and surfactant, the higher the concentration of surfactant, the lower the interfacial tension of the ASP system, and the lower the storage modulus and energy consumption modulus; when the interfacial tension is 0.188mN/m, the film-like residual oil is slightly deformed at the enriched part of the displacement front; when the interfacial tension is 0.0188mN/m, the oil displacement system reduces the contact area between the oil film and the wall by changing the wettability of the residual oil in the film-like shape, and the overall migration; when the interfacial tension is 0.00188mN/m, the oil displacement system breaks out oil droplets and starts to migrate the residual oil in a thin film.