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Aquathermolysis of heavy oil in the presence of bimetallic catalyst that form in-situ from the mixture of oil-soluble iron and cobalt precursors

E.R. Baygildin, S.A. Sitnov, A.V. Vakhin, A.V. Sharifullin, M.I. Amerkhanov, E.I. Garifullina

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The design of highly efficient catalysts of cracking reactions for intensification of thermal enhanced oil recovery technologies is a relevant task. Moreover, the cost-effective industrial synthesis of such catalysts is very important. In this paper, we discuss the efficiency of bimetallic catalyst, which forms in-situ from the mixture of oil-soluble iron and cobalt precursors, on the processes of upgrading heavy oil in the reservoir of Tatarstan Republic (Russia). A simulation of aquathermolysis was carried out in a high-pressure reactor – autoclave at 150-250оС. The treatment time varied from 6 to 24 hours and the share of catalyst and hydrogen donor was 2 %wt. each. The phase composition of the active form of binary catalyst was estimated from the result of X-ray diffraction measurement. It is characterized by the presence of individual (Fe3O4 and Fe2O3) and mixed oxides with ideal stoichiometry – СоFe2O4. The formation of cobalt sulfide (CoS2) was observed, which indicates the destruction of C-S bonds in high-molecular components of oil. According to the results of SARA-analysis and rheology behavior, the catalyst intensifies destructive processes of resinous compounds (their content reduces more than 45%). This provides an increase in the content of saturated hydrocarbons by 16% and redistribution of aromatic fragments in hydrocarbons with hybrid structure. Thus, the reduction of dynamic viscosity by 32% was succeeded.    


Heavy oil, bimetallic catalysts, oil soluble precursors, steam injection, in-situ upgrading, active form


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Emil R. Baygildin
Kazan (Volga Region) Federal University
4/5 Kremlevskaya st., Kazan, 420008, Russian Federation

Sergey A. Sitnov
Kazan (Volga Region) Federal University
4/5 Kremlevskaya st., Kazan, 420008, Russian Federation

Alexey V. Vakhin
Kazan (Volga Region) Federal University
4/5 Kremlevskaya st., Kazan, 420008, Russian Federation

Andrey V. Sharifullin
Oil and Gas Refining, Kazan National Research Technological University
68 Karl Marks st., Kazan, 420015, Russian Federation

Marat I. Amerkhanov
Tatneft PJSC
82 Marjani st.,Almetyevsk, 423450, Russian Federation

Elvira I. Garifullina
Kazan (Volga Region) Federal University
4/5 Kremlevskaya st., Kazan, 420008, Russian Federation


For citation:

Baygildin E.R., Sitnov S.A., Vakhin A.V., Sharifullin A.V., Amerkhanov M.I., Garifullina E.I. (2019). Aquathermolysis of heavy oil in the presence of bimetallic catalyst that form in-situ from the mixture of oil-soluble iron and cobalt precursors. Georesursy = Georesources, 21(3), pp. 62-67. DOI: