Effects of Na-montmorillonite particles on emulsification stability of polymer flooding produced water

摘要: The effects of Na-montmorillonite(Na-Mt) particles on the oil-water interfacial properties and oil-water separation of polymer flooding produced water were experimentally investigated. By using an interfacial rheometer and Zeta potentiometer to analyze the influences of Na-Mt particles on Zeta potential, interfacial tension and dilational viscoelasticity of polymer flooding produced water, and the adsorption of the Na-Mt particles on oil droplets was observed under optical microscopy. The result showed that with the Na-Mt particles concentration increasing, and when the Na-Mt particle concentration was less than 200 mg/L, the Na-Mt particles could cause the Zeta potential of oil droplets to rapidly decrease, interfacial tension to decline and dilational viscoelasticity to be enhanced. The results also showed that a stable oil-mineral aggregate(OMA) structure appeared in polymer flooding produced water, which had …