Applicability of Emulsion Viscosity Models to Crude Oil Emulsion

摘要

The rheology behavior of waxy crude emulsion is an important basic information on safeguard research of crude oil-water flow.The non-newtonian characteristics of apparent viscosity of three kinds of waxy crude emulsions were studied experimentally around condensation point; three apparent viscosity forecasting models were evaluated by least-square regressions based on experimental data of shear balance and the average absolute deviation was taken as the measurement of fitness of a model to experimental data.It is concluded that the Pal-Rhodes model,whose relative deviation can be as high as 80％,is the worst forecasting model,but it need the least experiment data to obtain model parameters,only water cut was needed.Elgibaly model has the best forecasting results,the average absolute deviation of forecasting results of three waxy crude emulsions under the condition of different temperature,water cut and shear rate were all less than 15％,but compared with the other two models,Elgibaly model needs the most parameters.