Current Science

T. R. Zakirov ¹, A. A. Galeev ¹, E. A. Korolev ¹, E. O. Statsenko ¹

Affiliations
1 Kazan Federal University, Kazan, 4/5 Kremlyovskaya Str, 420008, RU

Abstract

We report the use of X-ray micro-CT and numerical simulations for studying the reservoir properties of sandstone and carbonate rocks in the Melekess depression of the Volga-Ural anteclise, Russia. To simulate the flow of a viscous fluid in the pore scale, we use a mathematical model which consists of the continuity equation, stationary Navier-Stokes equations and Darcy law. As a result of computational micro-scale experiments on digital three-dimensional images of sandstone, we get satisfactory compatible permeability coefficients, which are calculated using Navier-Stokes and Kozeny-Carman equations. Carbonates with fracture porosity reveals significant variations in permeability coefficients, calculated by the two methods. The Kozeny-Carman equation can describe the flow properties of carbonates with a predominantly matrix porosity. It is shown that a pronounced heterogeneity of the pore space leads to the representative elementary volume for permeability coefficient in carbonates several times larger than in sandstones.

Keywords

Carbonate, Flow Properties, Permeability, Sandstone, X-Ray Computed Tomography.

Full Text