Reservoir description and production forecast are customarily accomplished by combining well logs, core laboratory data, and fluid-production measurements acquired in multiple wells with spatial-interpolation methods. The greatest and most diverse petrophysical, fluid, and compositional information is invariably concentrated at well locations within reservoir depth intervals. Spatial interpolation and extrapolation of that information between and beyond existing well locations are necessary for infill and step-out drilling, to anticipate fluid displacement caused by primary and/or enhanced recovery processes, and generally to maximize hydrocarbon production.

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