纳米增注微乳液微观分散性研究

The micro-dispersion research of nano-augmented injection microemulsion

采用廉价的表面活性剂、柴油和纳米SiO2制备出一种适用于低渗透油田采油的纳米增注剂,该增注剂可将柴油乳化成微小液滴,并使之均匀分散于水相中形成O/W型微乳液。通过透射电子显微镜(TEM)、高分辨扫描电子显微镜(SEM)、纳米粒度及电位分析仪、高分辨光学显微镜等测试手段对纳米SiO2及微乳液进行检测分析,结果表明纳米SiO2平均粒径约为20nm,微乳液滴平均粒径约为150nm,发现纳米SiO2以颗粒团簇的形式存在于柴油微液滴中。通过理论计算得出平均每个柴油液滴中存在6个纳米SiO2颗粒,实验结果和理论计算结果具有很好的吻合性。

A new nano-augmented injection agent was prepared by a cheap source of surfactant,diesel and nano-SiO2,and can be used in low permeability oil field.This nano-augmented injection agent can disperse diesel into micro droplets in water to make a steady O/W microemulsion.The nano-SiO2 and the microemulsion were characterized by the transmission electron microscope（TEM）,scanning electron microscope（SEM）,nano-particle size and potentionmetric Meter,high resolution optical microscope and other test methods.The results showed that the average size of the nano-SiO2 and the microemulsion droplets is about 20nm and 150nm,so there are several nano-SiO2 particles in one diesel micro droplet.The theoretical calculation proved that the average number is six.The experimental results and theoretical calculation results are good in completely agreement.