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Permeability Estimation Using CFD Modeling in Tight Carboniferous Sandstone
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Permeability, besides the standard laboratory measurements (permeameters), may be determined using combination of computed microtomography and Computational Fluid Dynamics methods. Generation of the geometric model of the pore space network is possible thanks to computed microtomography (micro-CT). In calculations, the Knudsen number should be considered, as a condition, which classifies the modelling approach and allows the use proper method (correct flow regimes). Using the CFD modelling the flow of the gas (nitrogen) and water through the porous system was analysed. Different pressure drops and meshes were used in simulation to verify the CFD modelling results which are depended on the pressure difference (boundary conditions). Permeability is calculated on the basis of simulation results using specially modified Darcy equation. Determined permeability values are similar for different fluids and pressure drops used in simulations. Compatibility between the permeability value calculated from the standard laboratory measurements and CFD modelling was observed for the Carboniferous tight sandstone sample.