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The AAPG/Datapages Combined Publications Database

Tulsa Geological Society

Abstract


Transactions of the 1995 AAPG Mid-Continent Section Meeting, 1996
Pages 116-126

Regional Correlations and Reservoir Characterization Studies of the Springer Group in the Anadarko Basin Area of Western Oklahoma

Paul W. Smith, Walter J. Hendrickson, Craig M. Williams

Abstract

The nomenclature used within the Anadarko Basin and encompassing shelf areas is typically erratic. A productive horizon may be incorrectly called several various names within the same field. The Springer Group, Upper Mississippian and Lower Pennsylvanian, is often misnamed as the overlying Pennsylvanian Morrow or the underlying Mississippian Chester. Generally, the Springer Group consists of the Boatwright, Britt, and Cunningham in ascending order. A correlative and equivalent formation may be called by various names by geologists familiar with the nomenclature of one region of the basin. Further complicating the understanding of the Anadarko Basin's geology, few detailed regional cross-sections are available (or even exist outside proprietary studies) showing the most up-to-date logs correlated throughout the basin. By using regional cross-sections, the stratigraphic relationships existing within the Springer Group are demonstrated as well as the contacts of the Springer/Chester and the Springer/Morrow identified. The lateral facies change of the Springer Group from a clastic facies into a carbonate dominated facies is illustrated by the log cross-sections.

Wells accounting for approximately thirty percent (30%) of the production attributed to the Springer Group in the Anadarko Basin have been evaluated. The perforated interval was compared to the logs and the correct (Springer) reservoir was identified. Detailed reservoir characterization of the reservoirs was conducted to include geologic and engineering data such as depths, thicknesses, porosities, permeabilities, pressures, water saturations, area, spacings, and heterogeneities along with a correlated "field-specific" reservoir type log. Log analysis was conducted on the producing interval, saturated interval, and gross interval. The results of the studies are presented.


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