乳状液在多孔介质中的微观渗流特征

A study on emulsion flow in porous media with micromodel

通过自制的微观孔隙模型做乳状液渗流实验,观察、分析了乳状液在多孔介质中的渗流特性。结果表明:乳状液在多孔介质中的流动特性非常复杂,堵塞十分明显,堵塞的机理主要有单个乳状液分散相液滴引起的堵塞、分散液滴无序拥挤引起的堵塞和细小液滴在管壁吸附引起的堵塞3种;流速较高时,乳状液在孔隙介质中的流变性表现为剪切变稀非牛顿型,与进入模型前乳状液的流变性一致。该研究对乳状液堵水方案设计、三元复合驱技术及乳状液驱油技术具有指导意义。

With selfmade porous micromodel,the experiments of emulsion flow in a porous medias were conducted.The results indicate that the flow characteristics of emulsion in porous media are very complex,and the emulsion is plugged in the pour throats obviously.There are three main mechanisms of drop capture.The characteristics of emulsion rheology appears sheared pseudoplastic of nonNewton fluid as emulsion flows at the higher velocity in porous micromodels,which is similar with its in viscometers before it enters the porous micromodels.The results of the study may provide a theoretical guidance for designing water blockoff,ASP flood and displacement with emulsion.