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This article is cited in 1 scientific paper (total in 1 paper)
Simulation of fracking fracture cleaning as oil is displaced from the fracking fracture region
N. N. Smirnova, V. F. Nikitinab, E. I. Skrylevaba, R. R. Fakhretdinovaa a Moscow State University, Moscow, Russian Federation
b Federal State Institution “Scientific Research Institute for System Analysis of the Russian Academy of Sciences”, Moscow, Russian Federation
Abstract:
This paper studies oil displacement from a porous reservoir with water. It is assumed there is a fracking fracture near the production well. It is known that as a viscous fluid is displaced by a less viscous fluid, the Saffman–Taylor instability occurs: the less viscous fluid breaks through the layer of the fluid being displaced, forming so-called “viscous fingers” (channels). After such a channel is ruptured and connected to a production well, the oil quality (i.e., the fraction of hydrocarbons in the production fluid) deteriorates dramatically. The paper describes the simulation and numerical modeling of viscous fluid unstable displacement from a porous medium. The displacement is modeled with Darcy's law also considering capillary effects. The Brooks–Corey model is used to estimate the relative phase permeabilities. A fracking fracture is modeled as an area with elevated porosity and permeability. We consider the fracking fracture cleaning from the fracking fluid: a reservoir area filled with fracking fluid around the fracture is modeled; then the fluid is displaced with lower viscosity oil. The process is unstable and the displacement is uneven, so some of the fracturing fluid may remain inside the reservoir.
Keywords:
filtration, fracturing fracture, multiphase flows, displacement instability.
Citation:
N. N. Smirnov, V. F. Nikitin, E. I. Skryleva, R. R. Fakhretdinova, “Simulation of fracking fracture cleaning as oil is displaced from the fracking fracture region”, Russian Journal of Cybernetics, 3:3 (2022), 14–21
Linking options:
https://www.mathnet.ru/eng/uk39 https://www.mathnet.ru/eng/uk/v3/i3/p14
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Abstract page: | 31 | Full-text PDF : | 27 | References: | 4 |
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