A map of one time slice (early Oswego) of the Anadarko Basin where dolomitized shelf carbonates and Pennsylvanian Granite Wash sediments were being deposited simultaneously. Of note in the map are: (a) the gross isopach of the Cleveland and Oswego formations designated with grey contour lines; (b) the net clean Gamma Ray isopach of an early Oswego time slice shown with color-filled contours; (c) the location of horizontal wells drilled in the past two years (per IHS); and (d) the location of cross section C to D that intersects several of the areas with horizontal drilling activity.

The color-filled contours (net clean gamma ray) illustrate clearly that low API Granite Wash sediments are collecting in the basin’s depocenter north of the Wichita Uplift where accommodation space is available. The other trend of low API carbonate material exists along the basin margin to the northeast, north, and southeast, which is one early piece of the Oswego reef. Note that the position of the reef closely follows the shelf break.

(Image courtesy of Reservoir Visualization)

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