As part of a regional study, the logs from every producing well in the majority of the Anadarko Basin and Shelf of Oklahoma were reviewed to verify the actual producing reservoir and assign a consistent nomenclature. Both detail and regional cross-sections were constructed and used to determine stratigraphic relationships and develop a stratigraphic nomenclature system that could be used across the area with accuracy, detail, and consistency. Correlations were made from the Heebner Shale (Cisco, Upper Pennsylvanian) to the deepest zones penetrated. Allocation of the production within the study area was made based on these correlations and the associated nomenclature system. Some of the end products of this study have been greater definition and accuracy in the production data. One: example of this is seen in the production from the mountain front "washes" found in the southwestern portion of the Anadarko Basin. Previously, in many instances, thousands of feet of washes had reservoir nomenclature indicated as "Granite Wash" or "Atoka Wash". Analysis indicated that often the reservoir rocks were neither granite wash (being chert or carbonate washes) nor Atokan (being either younger or older). With the regional correlations as indicated by cross-sections, it was possible to subdivide the washes and assign more accurate and definitive nomenclature. Cross-sections and other pertinent data will be presented that will demonstrate the regional correlations and the methodology used to arrive at them.

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