The Granville Pay Zone: A Shallow Upper Ordovician Limestone Reservoir in the Lexington Limestone of South-Central Kentucky1
Published:January 01, 1988
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Michael P. Sullivan, Wayne A. Pryor, 1988. "The Granville Pay Zone: A Shallow Upper Ordovician Limestone Reservoir in the Lexington Limestone of South-Central Kentucky", The Trenton Group (Upper Ordovician Series) of Eastern North America: Deposition, Diagenesis, and Petroleum, Brain D. Keith
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The Granville pay zone produces oil and gas from pelecypod/ gastropod rudstone and grainstone carbonate sediment-piles that accumulated as shoal and beach deposits on a shallow-water carbonate platform in Late Ordovician (Edenian) time. Fresh-water vadose diagenesis produced secondary porosity into which hydrocarbons migrated. There is a predictable trend to these Granville pay zone reservoirs, and other similar reservoirs can be predicted using modern sedimentological techniques.
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The Trenton Group (Upper Ordovician Series) of Eastern North America: Deposition, Diagenesis, and Petroleum
Regional facies for the Upper Ordovician Series (global classification) of eastern North America consist of clean (pure) carbonates, mixed carbonates and terrigenous clastics, shale, terrigenous clastics coarser than shale, and terrigenous clastics prograding over carbonates. The last facies is characteristic of the Upper Ordovician. Maps and cross sections for stages of the Upper Ordovician demonstrate the influence of regional tectonic events on the sedimentation pattern of these facies.