The Effect of Alkaline on the Properties of Combination Flooding Agent During Long Distance Migration in Daqing Oilfield

Abstract Combination flooding, which performs well on both sweep efficiency and displacement efficiency, is being extensively utilized in Daqing Oilfield. Surfactant-polymer (SP) flooding alkaline-surfactant-polymer (ASP) are two of the most used combination techniques. According to findings, alkaline lowers oil-water interfacial tension reduces other component’s adsorption. Nevertheless, also has negative effects like scaling cost increasing. Therefore, use still disputed. In order clarify role SP ASP comparative tests conducted with typical formula A 3000-centimeter long model built simulate distance migration for property change study. During fluid samples obtained along model, properties such as viscosity, (IFT), components concentration measured. 3.60 percent higher recovery rate caused by compared primarily due near inlet area. polymer surfactant dynamic retention 20.16% 13.43%, respectively, when flooding. Besides, maintains viscosity at a level IFT lower first third spacing Consequently, noticeable area fade increase.