This paper presents our experience in the studies of naturally fractured reservoirs using a state-of-the-art fractured reservoir simulator. Characteristic features of fractured reservoirs were analyzed during simulation of two reservoirs and laboratory imbibition experiments. One simulation study involving a North Sea reservoir required an accurate description of the imbibition processes. Production history and rise of free water level (FWL) in the fracture system were matched by changing the degree of imbibition and fracture porosity in the reservoir. The results of the study were used to justify waterflooding.

For a naturally fractured offshore reservoir in the United States, the simulator was used to predict production performance as influenced by matrix permeability, fracture porosity, compressibility and capillary pressure. The simulation results were utilized in the reservoir development plan.

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