We present comparisons of simulations of performance histories for wells in highly compartmented, fluvial gas reservoirs generated by very precise finite element models and a much simpler multi-compartment material balance model. These comparisons validate the capability of this simple compartment model for the evaluation of compartmented reservoirs. Specifically we show that history matching of well performance with this simple model provides excellent estimates for directly drained pore volumes, supporting secondary pore volumes and intercompartment transmissibilities.

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