David W. Bowen1, Paul Weimer2, Andrew Pulham3
(1) Energy Minerals and Applied Research Center, University of Colorado, Boulder, Bozeman, MT
(2) University of Colorado, Boulder, Boulder, CO
(3) University of Colorado, Boulder, CO
ABSTRACT: Reservoir Geology of Nicholas and Liverpool Cemetery Fields, Stanton County, Kansas, and their Significance to the Regional Interpretation of Morrow Formation Incised Valley-Fill Systems in Eastern Colorado and Western Kansas
Reservoirs within the Lower Pennsylvanian Morrow Formation of Colorado, Kansas, and Oklahoma have produced greater than 8 TCF of gas and 200 million barrels of oil. This prolific depositional system produces from reservoirs representing a range of depositional environments from updip fluvial dominated incised valley-fills to deep-water basin-floor systems. The most comprehensively studied facies tracts have been the updip regions of incised valley-fills that produce oil and gas in eastern Colorado and western Kansas on the stable cratonic shelf northwest of the Anadarko Basin. Little is published pertaining to the downdip fill of the incised valley systems proximal to the shelf break into the Anadarko Basin. The valley systems in this downdip region are deeper, wider, and demonstrate greater marine influence than the updip regions of the valley systems farther north and into the hinterland. Compartmentalization in these reservoirs differs significantly from updip valley-fill reservoirs. It is important to understand the scale, geometry, and internal complexity of this system because sandstones formed in this depositional environment are important gas reservoirs in southwest Kansas. This poster focuses on incised valley-fill strata in the downdip region of one these systems. Cores, wireline logs, and production data collected from the Morrow Formation at Nicholas and Liverpool Cemetery fields in Stanton County, Kansas provide valuable data from which to describe and interpret this downdip valley-fill. This poster describes these downdip incised valley-fill reservoirs from the three cores cut in this producing complex and documents the trapping relationships of these reservoirs, and their production characteristics.
AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado