Abstract
A series of experiments with heavy crude oil were carried out by modeling hydrothermal effects involving mineral compounds of carbonate rocks. Depending on the thermodynamic parameters of exposure, various mechanisms of chemical transformations of heavy crude hydrocarbons predominate, affecting its composition and properties. In this paper, samples of crude and converted oil were analyzed by various instrumental methods. The work on the aquathermolysis of oil was carried out in a laboratory batch unit under isothermal conditions at of 290-375°C and pressures of 1-13.5 MPa. In this work, component composition, chromatographic analysis, rheology, X-ray analysis of heavy crude and converted oil were carried out. In converted crude oil the content of light fractions boiling up to 200°C increased with increasing in the specific surface of mineral compounds under hydrothermal influence. The results of X-ray structural analysis showed the presence of chemisorption processes on the surface of mineral particles as a result of hydrothermal influence on crude oil.
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