General Anisotropic Effective Medium Theory for the Effective Permeability of Heterogeneous Reservoirs |
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Authors: | Fokker P A |
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Institution: | (1) Netherlands Institute of Applied Geoscience TNO, P.O. Box 80015, 3508 TA Utrecht, Netherlands |
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Abstract: | One of the techniques to calculate the effective property of a heterogeneous medium is the effective medium theory. The present paper presents a general mathematical formulation for the effective medium approximation using a self-consistent choice of the effective permeability, to apply it to the case of a general anisotropic 2D medium and to the case of a 3D isotropic medium with randomly oriented ellipsoidal inclusions. The 2D results are compared with analytical results and with a homogenization technique with good result. The 3D correlations are used to derive percolation thresholds in two-phase systems with a large permeability contrast, which are compared to numerical results from the literature, also with good results. |
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Keywords: | upscaling effective medium theory effective permeability fracture network |
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