原油饱和度对低张力泡沫剂的泡沫再生影响研究

Impact Study of Oil Saturation on foam Regeneration of Low Tension Foams

原油对泡沫的稳定性具有破坏和抑制作用,油的存在将降低泡沫在多孔介质中的封堵能力,进而会影响到泡沫在多孔介质中的渗流规律。本文研究了不同含油量对低张力泡沫剂体系起泡能力的影响变化规律;通过可视化实验,观测泡沫在通过含油多孔介质后的生成状态;采用多点测压长岩心,模拟地层中泡沫驱油过程,在含油条件下各段岩心泡沫生成情况,泡沫的生成规律以及封堵特征,并分析各段压力随时间的变化规律。

Crude oil can destroy and inhibit the stability of foam,and the existence of oil will reduce the ability of foam sealing in porous media,and thus affect the law of foam seepage in porous media.The effect of different oil content on foaming ability of low tension foaming agent system was studied.Through visualization experiment,the formation state of foam after passing through porous media containing oil was observed.The multi-point pressure measuring long core is adopted to simulate the process of foam flooding in the formation,the formation of core foam in each section under the condition of oil content,the formation law of foam and the sealing characteristics,and the change law of pressure in each section with time is analyzed.