Upper Pennsylvanian Calcareous Rocks Cored in Two Wells in Rawlins and Stafford Counties, Kansas

Abstract

This report describes Upper Pennsylvanian rocks encountered in continuous cores taken from the Skelly Oil Company No. 1 Bartosovsky well in sec. 9, T 1 S, R 34 W, Cahoj oil field, Rawlins County, and the Stanolind Oil and Gas Company (now Pan American Petroleum Corporation) No. 3 Denker well in sec. 10, T 22 S, R 12 W, Max oil field, Stafford County, Kansas. Lithology and small-scale petrologic features of the limestones and calcareous siltstones in the cores are described in detail and illustrated in photographs.

Porosity and permeability data obtained from core analyses are shown graphically. Most porosity is related to sedimentary breccias, stylolites, masses of void-filling calcite, fractures, oolites, and fossils. Breccias and calcite masses are interpreted to have formed partly as a result of contraction of the sediment before final consolidation.