Abstract
Summary Quantitative models are needed to predict interactions between rock properties and drive mechanisms in geologically complex reservoirs. Analog studies using outcrop data provide insights for modeling, understanding, and predicting the behavior of oil and gas reservoirs. Stratigraphic cornerpoint grids preserve the geometries and facies distributions of outcrop data sets. Flow simulations of two outcrop exposures of sandstone-rich fluvial-deltaic tongues within the Cretaceous Age Ferron sandstone (Utah) revealed differences in fractional flow, recovery efficiency, and deliverability that can be related to stratigraphic setting. Compared with homogeneous models, models based on the landward-stepping tongue exposed at the Picture Flats locality had more tortuous flow paths and lower gas recovery efficiency. In the seaward-stepping tongue exposed at the Interstate 70 location, the displacement was layer like. Gas deliverability at the Interstate 70 locality varied with the well location; it was highest when the well penetrated high-permeability shallow-marine sediments and lowest when flow was restricted by a shale-lined valley-fill succession.
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