Correlation of polar fractions of heavy oil with its viscosity and reverse phase point of emulsion

The correlation between the contents and properties of polar fractions and the viscosity of heavy oil were studied by gray correlation entropy method.By changing volume fraction of water and temperature of the emulsions of heavy oil, the relation between the composition property of heavy oil and the reverse phase point were also researched. The result showed that the order of correlation degree between the polar fractions and the viscosity of heavy oil was: asphaltene>resin>aromatic>saturate; and the order of correlation degree between the mean dipolemoments of polar fractions and the viscosity of heavy oil was: asphaltene>resin>aromatic. In addition, as the increase of the contents of the resin and asphaltene, the decrease of the interfacial tension of oil-water, and the increase of Zeta absolute value of oil drops, the volume fraction of water and temperature at the reverse phase point of emulsion gradually raised.