Abstract: Based on the screened single flooding agent suitable for reservoir conditions of V upper unit in Shuanghe oilfield,the concentration changes effect of the single flooding agent on the performance of composite system has been studied.The formulas of the binary flooding system and ASP flooding system suitable for reservoir conditions of V upper unit in Shuanghe oilfield have been screened out,and the evaluation on the basic performance of these two systems and the displacement performance has therefore been carried out.Results show the interfacial tension of these two oil displacement systems can reach the ultra-low magnitude order of 10-3mN/m.By comparing the advantages and disadvantages of these two kinds of compound flooding technologies,ASP flooding system is recommend.