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Kansas Geological Survey Open-file Report 2003-68 |
Petrophysical properties and fluid saturations are lithofacies-dependent. Permeability-porosity cross-plots by lithofacies show this quite dramatically with permeabilities having more than two orders of magnitude variation for a given porosity depending on lithofacies. Grainstones exhibit the best properties. Capillary pressures and corresponding water saturations (Sw) also vary significantly between lithofacies and gas column height. For 10% porosity and a gas column height of 300 feet, grainstones have an Sw of 22%, dolomite, 48% and nonmarine siltstones, 78%.
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Last updated January 2004
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