孤岛N28-1井区活性剂驱矿场试验

: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 .

Field Test of Active Water Drive in N28-1 Wellblock of Gudao Oil Field

N28 1 wellblock is a typical unconsolidated sandstone pool of high permeability, high saturation pressure and high viscosity. Its recovery percent of reserves had reached to 26.7% through the development of 24 years. And there is little potential of enhancing oil yield by increasing liquid yield or adjusting well pattern. In order to increase its recovery factor, the field test of active water drive was carried out in February, 1998.To December 31th, 1999,the increased oil production had accumulated to 10952t, water cut had been decreased to 90%, the recovery factor had been increased by 0.89%. The results show that the active water drive is of obvious effect of oil production increasing, and it has good application prospects.