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Flow Properties of Sandstone and Carbonate Rocks by X-Ray Computed Tomography


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

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.
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  • Flow Properties of Sandstone and Carbonate Rocks by X-Ray Computed Tomography

Abstract Views: 321  |  PDF Views: 157

Authors

T. R. Zakirov
Kazan Federal University, Kazan, 4/5 Kremlyovskaya Str, 420008, Russian Federation
A. A. Galeev
Kazan Federal University, Kazan, 4/5 Kremlyovskaya Str, 420008, Russian Federation
E. A. Korolev
Kazan Federal University, Kazan, 4/5 Kremlyovskaya Str, 420008, Russian Federation
E. O. Statsenko
Kazan Federal University, Kazan, 4/5 Kremlyovskaya Str, 420008, Russian Federation

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.



DOI: https://doi.org/10.18520/cs%2Fv110%2Fi11%2F2142-2148