Study On Influencing Factors Of The Pour Point Reducer On Water-oil Emulsion Inversion Characteristic

There are many factors that associated with the stability of the emulsion.Actually，in thepipeline transport，the emulsion always be cut.The oil droplet will be stretched if the emulsioncut by the high strength and hight shearing action such as the pump，it will lead to theoil-water interfacial film thinning.If the strength of this film cannot resist the cut，the film willbe broken，the adjacent oil droplet will be merge，the emulsion inverse.This will let theviscosity of the system increase sharply and bring disastrous consequences for the pipeline.Itis crucial to improve the safety of pipelines and reduce the cost to study the inversioncharacteristics of the crude oil emulsion.In this paper， the pretreatment conditions of crude oil and the methods emulsionpreparation are based on the analyze of the rheological behavior of Daqing oil，study thestability and the phase inversion of emulsion influenced by the temperature，shear rate and theOEAM.By the test，the increase of temperature and the shear rate can make the water cut ofcrude oil phase inversion point bring forward in a certain range.This task chose three kinds ofOEAM that widely used at present，by experimental verification，summarizes the factors thatinfluence on crude oil emulsion phase inversion point.Different kinds of OEAM can reducethe apparent viscosity and influence the phase inversion point of emulsion in differentdegrees.And finally，by the prediction equation of the moisture content-viscosity，obtain thatthe phase inversion point prediction curve accord with Gaussian Curve and LorenzCurve.This curve can calculate the viscosity of the oil-water emulsion and predict the locationof phase inversion point in a certain range of temperature and shearing rate，it also can predictthe viscosity well.