Field Development and Renewed Reservoir Characterization for CO2 Flooding of the Hall-Gurney Field, Central Kansas

Kansas Geological Survey
Open-file Report 2001-38

Analogs for L-KC Oolite Shoal Reservoir of Hall-Gurney in
Kansas and in Modern Systems

Oolitic packstones and grainstones are the most prolific reservoir lithofacies for the Lansing-Kansas City in Kansas. Oolite shoal facies owe their wide distribution geographically within Kansas and stratigraphically within the Upper Pennsylvanian (especially in the L-KC) to bathymetry (nearly flat) and episodic sea level changes. The broad Kansas shallow shelf and oscillating sea level resulted in lateral migration of oolite shoal conducive environments.


Bedding Architecture of Bethany Falls in Outcrop and Near Surface

Surface exposures, shallow cores and wireline logs provide detailed view of the architectural elements comprising L-KC ooid grainstones. Ooid shoals accumulated as lobate deposits on ramped shelves (contours on map) usually delimited by buildup of the regressive limestones containing the ooid deposits. A dip-oriented cross section (A-C) along the depositional slope shows lobes of oolite comprising the ooid body within the upper portion of the Bethany Falls Limestone. Lobes are delineated by tight skeletal packstones, potential baffles to fluid flow. (French and Watney, 1993).

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Last updated December 2001