Results from a new multiphase discrete fracture model are compared to simulation results using a variety of homogenization methods. A 2-D random fracture network is used as an example. The discrete-fracture model has been developed as an alternative to the dual porosity models. It will be difficult to capture the features of the fracture network using dual porosity models. At low permeability contrast (between the matrix and the fracture), as expected, the new model showed symmetric water advance in a water flood simulation. At high permeability contrast, features of the fracture network became critically important with great deal of oil bypassing at higher flow rates. The results also showed that even though specific, mathematically rigorous homogenization captures the fracture network features, especially at fine resolution, the results are vastly different from the discrete-fracture model.

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