多孔介质中泡沫的直观特征研究

Research on visual characteristics of foam in porous media

为了评价泡沫在多孔介质中的稳定性,借助可视化微观模型驱替装置,利用图像采集系统,通过对大量图片进行分析,研究了水湿和油湿介质中不同压力下单一泡沫体系、复合泡沫体系在多孔介质中的稳定性以及泡沫的形成与衰变机理。结果显示,单一泡沫体系和复合泡沫体系在水湿介质中形成的泡沫稳定性均较好,泡沫形成较为容易;同等条件下泡沫体系在油湿介质中泡沫的形成较水湿介质中困难,泡沫稳定性较水湿介质中差;压力相同时,水湿介质和油湿介质中添加了高聚物的复合泡沫体系比单一泡沫体系泡沫稳定性好。

The stability,generation and decay mechanism of unitary and compound foam systems in water-wet and oil-wet porous media under different pressures have been studied by using visual microscopic displacement model and image acquisition system through analyzing a huge number of images. The results indicate that both unitary and compound foam systems exhibit good stability and easier foam generation in water-wet media;while under the same conditions,it is hard to generate foam and achieve good stability in oil-wet media;at the same pressure,compound foam system added high polymer is more stable than unitary foam system in both water-wet and oil-wet media.