In article possibilities of predicting the viscosity of stable multicomponent water-oil systems in practice, when it is impossible, for a number of reasons, to obtain their experimental values, are considered. A predictive model is proposed to describe the change in the viscosity properties of various oil-water emulsions depending on the degree of water saturation. It is shown that the proposed formula allows to determine the effective viscosity of water-oil systems in the entire range of variation of the velocity gradient in the absence of experimental data and is acceptable for engineering practice. Keywords: viscosity; water-oil emulsions; matematical description; water saturation degree; heterogeneous systems.

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In this article has been proposed empirical dependencies for the direct determination – without mathematical calculations or experimental measurements of density of “water-oil-sand” type rheological complex mixtures resulting from arbitrary mixing of oil with water and sand in the processes of production, collection and transportation of well products. Also, based on the application of «Colour characteristics», a new diagnostic method that allows to explain the dependence of density, which is one of the main quality indicators of heterogeneous liquids transported by pipeline, on watering and temperature factors, as well as the concentration of filler element, leads to new trivial solutions in the processes of production and transportation. Given its practical significance and expediency for use in hydraulic calculations, its application prospects have been commented. Keywords: granular filler; dispersed systems; heterogeneous liquids; suspension; density factor; empirical dependence.

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