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- W2765519937 abstract "A series of rheological properties of the main components (saturated compounds, light and heavy aromatic compounds, resins and asphaltenes), extracted from a typical sample of heavy oil extracted in tatarstan (russia), were consistently investigated. The viscosity and viscoelastic characteristics of these components are measured in a wide range of temperatures and deformation conditions, as well as their solutions in tetralin. Saturated hydrocarbons behave in a manner similar to paraffin oil, i. E. Demonstrate viscous-plastic behavior at low temperatures. For light aromatic compounds, non-newtonian behavior is characteristic, and heavy aromatic compounds, as well as resins and asphaltenes, behave like newtonian fluids. In their totality, the anomalous-rheological effects practically do not affect the rheology of heavy oil, which can be regarded as a newtonian fluid over a wide range of temperatures. The most significant value for the viscosity of heavy oil is the interaction of resins and asphaltenes. Concentration dependences of the viscosity of these components are qualitatively similar, but the viscosity of solutions of asphaltenes at high concentrations is much higher than the viscosity of equicomponent resin solutions. This reflects a lower critical concentration of asphaltenes, at which their formation occurs (up to the formation of graphene), compared to resins. An investigation of the rheology of the model artificial oil, from which the resins were removed, but contained a different amount of asphaltenes, showed that in this case the viscosity was higher than in the original oil. This indicates a stabilizing effect of the resins, which most likely contribute to the formation of emulsions, preventing further structure formation of the asphaltenes." @default.
- W2765519937 created "2017-11-10" @default.
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- W2765519937 date "2017-10-01" @default.
- W2765519937 modified "2023-09-25" @default.
- W2765519937 title "Role of Main Components in the Rheology of Heavy Oil (In Russian)" @default.
- W2765519937 hasPublicationYear "2017" @default.
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