强化泡沫驱油体系性能研究

Performance of foam in the forced foam flooding system

利用Waring搅拌器测定了不同泡沫体系的泡沫性能 ,利用岩心驱替试验测定了泡沫在岩心中的阻力压差及驱油效果 ,研究了不同浓度的聚合物对泡沫体系起泡性能和稳定性的影响 ,确定了聚合物在强化泡沫驱油体系中的最佳使用量。对单一聚合物体系、单一泡沫体系与强化泡沫体系在水驱后的稳定性及驱油效果进行了对比分析 ,结果表明 ,强化泡沫体系比单一泡沫体系具有更强的稳定性 ;比聚合物及单一泡沫体系的驱油效果更好 ,是一种较为实用的驱油体系。室内试验表明 ,该体系能够较大幅度地提高采收率。

The performances of foam in different foaming systems were investigated by using the Waring mixing beater. The pressure differential of resistance and oil displacement effectiveness of foam inside the cores were measured by means of the core displacement flowsheet. The influences of polymer with different concentrations on the foaming ability and stability of foam were studied. The optimum polymer volume in the forced foam flooding system was determined. The stability and oil displacement efficiency of the forced foam flooding system after water flooding were compared with those of the single polymer system and the single foam flooding system. The research results show that the forced foam flooding system is applicable for displacement much more stable than the single foam flooding system. This system has better efficiency for oil displacement than the polymer flooding and single foam flooding systems. The laboratory tests show that the forced foam flooding system can greatly increase the recovery efficiency.