Paper Title
Interfacial Dilational Rheology of a Dispersed Particle Gel Strengthened Alkali/Surfactant/Polymer as a Novel DASP Combination Flooding System for Enhanced Oil Recovery

Abstract
Due to the dispersed particles' excellent characteristics, such as adjustable size distribution, softness, viscoelasticity, high-temperature tolerance, thermal stability, and high expansion, a dispersed particle gel has attracted considerable interest in the recent study for a good application prospect in the enhanced oil recovery process. The dispersed particle gels can effectively improve the profile control through direct plugging or bridging across pore throats in the formation. These characteristics demonstrate excellent potential for the dispersed particle gels in a combination flooding system. In this work, the interfacial dilational rheology phenomena reflected by oil film analysis were observed in the dispersed particle gels strengthened alkali/surfactant/polymer as a novel combination flooding system. Furthermore, the concentration effects of dispersed particle gels, alkali, surfactant, and polymer on the interfacial dilational rheology were investigated. The adsorption performance at various salinities, temperatures, and aging times was also evaluated to describe the impact of external factors on the system. In general, the oil displacement system's rheological properties are the key factors that determine the oil displacement efficiency and oil-water interfacial tension in the reservoir. The results show that the external factors have a slight effect on the interfacial rheology, and the significant increase in the interface elasticity in the system produced a positive effect. The interaction reaction appeared in the combination flooding system. The dispersed particles adsorb on the interface together with the surfactant molecules, and the aggregate between particles enhance the adsorption film strength of the system. The added dispersed particle gel to strengthen the alkali/surfactant/polymer system could intersperse in the system's network structure by increasing the displacement efficiency and the swept volume capacity's synergistic effect. For the enhanced oil recovery capacity of the dispersed particle gel strengthened alkali/surfactant/polymer combination flooding system, the experiment on a single sand-pack model will determines the mobility control capacity and double parallel sand-pack to determine the profile control improvement capacity of the system. Therefore, the dispersed particle gels strengthened alkali/surfactant/polymer combination flooding system has an advantage and had a considerable effect on the application in enhanced oil recovery. Our results analysis eventually improves the understanding of the oil-water interfacial dilational rheology phenomena, and the dispersed particle gel's oil recovery capacity strengthened the alkali/surfactant/polymer combination flooding system. Keywords - Interfacial Dilational Rheology; Dispersed Particle Gels; Interaction Mechanism; Adsorption Film; Sand-Pack Model; Enhanced Oil Recovery.