关键词: 固体颗粒,    ,  O /W 乳状液,    ,  界面张力,   , 界面剪切黏度,   ,  Z e t a电位

Abstract: Using surface tensiometer, interfacial shear viscosity meter and Zeta potentiometer to analyze the effects on the interfacial properties and emulsion stability when the solid particles (Nano SiO2，NaMMT) in the Daqing oilfield ASP flooding were together with the oil displacement agents(Alkali，Surfactant，Polymer). The results show that the absolute value of Zeta potential on the oil droplet surface increases when adding solid particles to the alkali solution. Adding solid particals to the alkylbenzenesulfonate solution, the interfacial tension increases and the interfacial shear viscosity decreases. The absolute value of Zeta potential on the oil droplet surface increases significantly after adding solid particles to HPAM solution. After adding solid particles to alkali solution, low concentration will worsen the stability of O/W emulsion, whereas high concentration(800 mg/L)will be helpful for the stability of O/W emulsion. After adding solid particles, the stability of O/W emulsion formed by thealkylbenzenesulfonate solution and simulated crude oil decreases, but the stability of O/W emulsion formed by HPAM solution and simulated crude oil becomes worse.

Key words: Solid particles,    ,  O/W emulsion,    , Interfacial tension,    , Interfacial shear viscosity,    , Zeta plus potential