Oil production in Graham County, Kansas, is from the sands and carbonates of the Lansing-Kansas City Groups (Upper Pennsylvanian).

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Accumulation generally is considered to be controlled by structure. However, the oil-to-structure relationship is difficult to discern in the original structure contour maps. Evaluation of the geologic maps can be aided by the application of computer enhancement techniques that display the component structures without the distorting effect of regional trends and conflicting small-scale features. A variety of computer techniques display potential prospects, and statistical tests are necessary to determine the optimum enhancement technique for each area. Spatial filtering of the Graham County maps indicates there is better than a 98% probability that the oil is pooled structurally and that the optimum filter displays features with untested locations that have a better than 40% chance of success.

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