The paper studies the wetting effects on the characteristics of two-phase fluid flows in porous media. The originality of paper is a study of displacement under dynamic conditions when the action of viscous forces is significant. As a research tool, the methods of mathematical modeling are used – the lattice Boltzmann equations in a combination with a color-gradient model that describes interphacial interactions. Numerical experiments are carried out in a digital model of a porous medium characterized by a high degree of the pore space heterogeneity. In this work, a map of flow regimes in the coordinates “capillarity number – contact angle” is performed. The identification of four crossover modes between flows with capillary, viscous fingers and with a stable displacement front is carried out. Special attention is paid to the study of the influence of wetting effects on the specific length of the “injected fluid – skeleton” interface.
wetting angle; capillary number; drainage; imbibitions; lattice Boltzmann equations
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Timur R. Zakirov – PhD (Physics and Mathematics), Associate Professor, Institute of Geology and Oil and Gas Technologies
Kazan Federal University
4/5, Kremlevskaya st., Kazan, 420033, Russian Federation
Maxim G. Khramchenkov – DSc (Physics and Mathematics), Professor, Head of the Department of Mathematical Methods in Geology
Kazan Federal University
4/5, Kremlevskaya st., Kazan, 420033, Russian Federation
Zakirov T.R., Khramchenkov M.G. (2022). Investigation of the wetting effects on two-phase fluid flows in a heterogeneous digital core under dynamic conditions. Georesursy = Georesources, 24(1), pp. 16–26. DOI: https://doi.org/10.18599/grs.2022.1.2