Pore Size and Ultrasonic Velocity: Lessons From Miss Lime Reservoirs
Published:January 01, 2019
Rohit Raj, Priyank Jaiswal, Beth Vanden Berg, G. Michael Grammer, 2019. "Pore Size and Ultrasonic Velocity: Lessons From Miss Lime Reservoirs", Carbonate Pore Systems: New Developments and Case Studies, Donald F. McNeill, Paul (Mitch) Harris, Eugene C. Rankey, Jean C.C. Hsieh
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This article investigates the relationship between rock properties (composition, porosity, and pore architecture) and dry ultrasonic P-wave velocity (VP) of 14 samples representing three facies of the Mid-Continent Mississippian-age Limestone (Miss Lime) units of North–Central Oklahoma. Generally, in carbonate rocks, what drives VP, in addition to bulk porosity (ϕ) and composition, is not straightforward to determine. In this data set, when samples are categorized based on their facies and composition (quartz fraction), VP shows a better trend with dominant pore size rather than ϕ. Results show the dependence of elastic properties on texture and highlight a need for incorporating pore-size distribution in seismic models used for seismic interpretation of low-permeability reservoirs such as the Miss Lime.