Abstract: Geology of Mississippian Combination Trap, Bindley Field, Hodgeman County, Kansas

W. J. Ebanks, Jr., Doris E. N. Zeller, Robert M. Euwer

Bindley field, Hodgeman County, Kansas, is a combination paleogeomorphic and facies trap developed in Lower Mississippian dolomite. Mapped originally as a simple domal anticline in an area of slightly thicker Mississippian section, this oil trap is localized in a highly porous, low-relief, bryozoan-mound facies of the "Warsaw" formation. The reservoir facies was exhumed and given additional relief by at least two periods of erosion before final burial beneath Middle Pennsylvanian sediments.

Diagenesis has drastically modified original patterns of sediment texture. Early cementation of crinoid grainstones occluded porosity; dolomitization of muddy facies and dissolution of skeletal particles enhance porosity; and silica replacement of evaporite and carbonate sediments further modified original sediment properties. Solution cavities and nontectonic fracturing are obvious results of subaerial weathering overprinted on other sediment features.

Factors to be considered in future exploration for other oil traps in the rocks of similar age in western Kansas are the difficulty in predicting areas of bryozoan-mound facies development and the fact that seismic-reflection mapping may not disclose the true vertical relief of the reservoir within the enclosing beds. Once production is established, complex reservoir behavior in fields of this type may be explicable in terms of details of reservoir lithology.

APG Search and Discovery Article #90974©1975 AAPG Mid-Continent Section Meeting, Wichita, Kansas