Simulation of Fracking Fracture Cleaning as Oil Is Displaced from the Fracking Fracture Region
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fracturing fracture
multiphase flows
displacement instability

How to Cite

Smirnov N.N., Nikitin V.F., Skryleva E.I., Fakhretdinova R.R. Simulation of Fracking Fracture Cleaning as Oil Is Displaced from the Fracking Fracture Region // Russian Journal of Cybernetics. 2022. Vol. 3, № 3. P. 14-21. DOI: 10.51790/2712-9942-2022-3-3-2.


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.
PDF (Russian)


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