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Near-Well Upscaling for Reservoir Simulations

Abstract : Upscaling of absolute permeability from geological/geostatistical models to reservoir flow simulation models has been discussed for a long time. It has been generally recognized that the main difficulty in upscaling is the dependence of upscaling results on boundary conditions, which lead to a nonunique solution. As a consequence of inaccurate permeability upscaling, well performance prediction might be very different using fine and coarse grid simulations. In this paper, the technique of near-well upscaling, which can improve dramatically coarse grid simulation accuracy for well productivities in heterogeneous media, is presented. The proposed near-well upscaling has been developed for 3D complex wells on both Cartesian and corner-point geometry (CPG) gridblocks. Equivalent results on well productivity are obtained between coarse grid and fine grid simulations.
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D. Y. Ding. Near-Well Upscaling for Reservoir Simulations. Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, Institut Français du Pétrole (IFP), 2004, 59 (2), pp.157-165. ⟨10.2516/ogst:2004012⟩. ⟨hal-02017293⟩



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