注水吞吐采油机理研究

单井注水吞吐采油是提高无能量补充井采出程度的方法之一。文章阐述了注水吞吐采油机理，模拟实验结果表明，各种润湿性油藏实施注水吞吐都有效，但随亲水性的增强，吞吐采出程度呈增大的变化趋势。在注入水中加入表面活性剂和粘土防膨胀剂后，可降低油水界面张力，减轻注入水对储层的损害，使润湿性向亲水方向转化．进一步提高油藏的采收率。

Study of oil production mechanism by waterflood stimulation

ngle well oil production by waterflood stimulation is one of the methods of improving recovery percent of reserves in the non-energy complement well. The oil production mechanism by waterflood stimulation is expounded. Simulation experiment indicates that waterflood stimulation is effective to oil reservoirs with different wettability, but the recovery percent increased as the hydrophilicity enhanced. After adding surfactant and clay antiswelling agent to injection water, lowered the oil-water interfacial tension is lowered, and reservior damage by the injection water is abated, it made the wettability transform into hydrophilicity, and recovery efficiency is further improved.