:N2 8 - 1井区是典型的高渗透、高饱和压力、高粘度的疏松砂岩油藏 .经过 2 4年的开发 ,采出程度 2 6.72 %,靠进一步提液或井网调整来提高原油产量的潜力不大 ,为提高该区块的采收率 ,改善驱油效果 ,采用了活性剂驱油方法 .现场设计 2段塞注入方式 ,于 1 998年 2月进行了矿场试验 .试验进行至 1 999年 1 2月 31日 ,累计增油 1 0 952 t,含水率下降 1 0 %,提高原油采收率 0 .89%.这表明了该种方法增油效果显著 ,能够达到提高采收率的目的 ,有较好的应用前景 . : Well N2 8 - 1 is a typical unconsolidated sandstone reservoir with high permeability, high saturation pressure and high viscosity. After 24 years’ development, the recovery rate is 2 6.72% In order to improve oil recovery in this area and improve oil displacement, an active oil displacement method was adopted.A 2-stage slug injection method was designed on site and a field test was conducted in February 1998. The test Until January 31, 1999, the cumulative increase of oil production was 1.0952 t, the water cut decreased by 10%, and the crude oil recovery rate was increased by 0.89%, indicating that the oil refining effect of this method is remarkable and can be improved The purpose of recovery, there is a better prospect.