Oil change can be significant in a number of parameters: density, viscosity, fractional composition, saturation pressure, gas factor, sulfur content, tar, asphaltenes and paraffin during development. However, changing the values of these parameters is often within the limits of measurement errors, and the laboratory determination of most of them is very laborious. Optical characteristics, as the most sensitive, fairly quickly and accurately determined integral parameters of oil can serve as a tool for assess the effectiveness of the technologies being developed. The results of a complex of optical studies using spectrophotometry and refractive-densimetry are presented in the article. In field practice, spectrophotometers have been widely used to solve a wide range of tasks. In this paper, for the analysis of optical properties, the values of the coefficient of light absorption at the appropriate wavelengths, characterizing the total content of chromophore compounds, vanadium porphyrins, and the content of vanadium porphyrins – vanadium etioporphyrins in oil were used, spectral coefficients correlated with the oil type in density and with the content of aromatic compounds. To identify chemical compounds, quantitative and structural analysis, and to determine the physicochemical parameters of substances, a refractive - densimetric method was also used. In the article, on the basis of the refractive index, the conversion factors were used, with the help of which the identification refractive- densimetric maps were constructed, which made it possible to visualize the grouping of samples of high-viscosity oil produced by composition. The results of the studies are important and are the basis for assessing the effectiveness of the application of oil recovery technologies at the Vishnevo-Polyanskoye high-viscosity oil field. The experiments are aimed at assessing the completeness of the production of reserves at various parameters of the impact on the reservoir system for working out the optimal technology.
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