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- W41358650 abstract "Estimates of permeability in carbonate rocks from porosity alone are highly uncertain but can be improved when pore geometry information is incorporated. We developed a permeability model for a 400-ft-thick carbonate reservoir on the Rock Springs Uplift, Wyoming, with the objective of increasing the accuracy of flow simulation during CO2 sequestration. Core data was used to identify hydraulic flow units within the reservoir and to further distinguish them through lithofacies analysis of thin sections. We used both the Flow Zone Indicator (FZI) and Winland’s R 35 method to identify the flow units. FZI and pore throat radius values were obtained from the log-of-permeability-versus-porosity crossplot of the core sample measurements. For the rock types composing the Madison Limestone on the Rock Springs Uplift, both the FZI and R35 methods proved to be effective techniques for rock-type classification. We found that acoustically derived porosity estimates within the Madison Limestone stratigraphic interval correlate well with those derived from the FZI. Sonic velocity in carbonates is a function not only of total porosity but also of the predominant pore type that determines the permeability of the rock. Hence our permeability estimation used both the density porosity and calibrated sonic porosity from conventional wireline logs. In the Madison Limestone, vug development within dolomitized sparitic carbonates has resulted in layered structures of super-permeable zones sandwiched between non-vuggy, less permeable micritic dolostones. Among the various vuggy zones of the Madison stratigraphic interval, permeability was found to vary by two to three orders of magnitude." @default.
- W41358650 created "2016-06-24" @default.
- W41358650 creator A5031569020 @default.
- W41358650 date "2013-01-01" @default.
- W41358650 modified "2023-10-16" @default.
- W41358650 title "Predicting Permeability in the Target Reservoirs on the Rock Springs Uplift, Southwest Wyoming" @default.
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- W41358650 doi "https://doi.org/10.1007/978-1-4614-5788-6_9" @default.
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