关键词: 磷硅酸盐-表面活性剂-聚合物驱体系, 界面张力, 缓蚀防垢, 色谱分离, 驱油效果

Abstract: Alkaline-surfactant-polymer(ASP) flooding is one of the technologies for enhancing oil recovery.But its application is often restricted by some problems such as corrosion and scaling in the oil production equipments caused by NaOH in ASP flooding.The SJT-B aid is a newly developed phosphorus silicate chemical additive.Some experiments on the corrosion-prevention and anti-scaling properties,interfacial tension,adsorption,the chromatographic separation degree of mixed solution,and the oil-displacement effect of the SJT-B aid-surfactant-polymer complex system were carried out.The results indicated that the complex system could efficiently decrease the interfacial tension and prevent the corrosion and scaling.The dynamic and static adsorptions of the surfactant-SJT-B aid-polymer complex system is almost the same as ASP in scale-prevention and anti-corrosion.The flooding experiments on the physical model with the same geological characteristics as Xingshugang Oilfield in Daqing validated that the flooding effect of the SJT-B aid-surfactant-polymer complex system was better than that of ASP.

Key words: phosphorus silicate-surfactant-polymer flooding system, interfacial tension, corrosion-prevention and anti-scaling, chroma-tographic separation, oil-displacement effect