ASP flooding have been widely tested in Daqing Oilfield. While significant decrease of water-cut of produced liquid and increase of oil production have been achieved, residual alkaline, surfactants and polymer in produced liquid have resulted in stable crude oil emulsion, causing great troubles in surface oil-water separation processes.
In this work, emulsification and stabilization of o/w ASP flooding produced liquid in Daqing Oilfield were systematically studied on artificial ASP fl...