Key words: high wax and high viscosity oils, rheological properties, viscosity, heat treatment, additivity law.
The dependence of mixture viscosity of waxy and heavy high viscosity oil on the concentration of heavy oil has been investigated in the present work. It has been shown that at approximately equal concentrations of these oils the strong deviations from the additivity rule for double logarithm of mixed oils viscosity take place. The influence of heat treatment on the rheological properties of the predictive oil mixture, expected to transport through the main pipeline Usa – Ukhta - Yaroslavl in the next 5 year, has been studied. It was found experimentally that the main rheological characteristics of oil depend substantially nonmonotonically on the temperature of preliminary heat treatment.
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