Abstract
The paper describes a process of crude oil differentiation in an oil reservoir induced by an inflow of light hydrocarbons. It was shown that when an oil-rich carbonate rock is destabilized the redistribution of oil components occurs due to the adsorption and/or precipitation of asphaltenes on the rock and their gravitational separation. More compact asphaltene aggregates concentrate in the bottom of the oil reservoirs model.
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ACKNOWLEDGMENTS
The authors are grateful to the researchers of the Multiple-Access Spectro-Analytical Center for Physical-Chemical Study of Structure, Properties and Composition of Substances and Materials, KazSC RAS, for their kind cooperation in the EPR spectroscopy of asphaltenes for this study.
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Okhotnikova, E.S., Ganeeva, Y.M., Barskaya, E.E. et al. Redistribution of Asphaltenes in Modeling of a Nonequilibrium Reservoir State. Pet. Chem. 61, 602–607 (2021). https://doi.org/10.1134/S0965544121060025
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DOI: https://doi.org/10.1134/S0965544121060025