The basic tool for fractured reservoir studies is the dual-porosity (-permeability) model. Using the Warren and Root concept of rectangular parallelepiped blocks, this (sugar box) model is generally considered as unrealistic by geologiests. On the other hand fluid flows within the matrix blocks are not simulated (one node) and the matrix-fracture exchanges within a cell are generally lumped in one connection including horizontal and vertical flows. This requires to compute and input pseudo kr-Pc curves which depend on the matrix petrophysical properties, block sizes and fluids present both in the matrix and the surrounding fractures.
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