Abstract
The Morrison field of Pawnee County, Oklahoma, is southeast of, and closely related to, the Kay County district in structure and producing horizons. Surface anticlinal structure is readily mapped on the Fort Riley limestone of Permian age. Subsurface structure is generally similar to the surface, and is mapped on the Tonkawa sand, Layton sand, and Mississippi lime of Pennsylvanian age, and the Wilcox sand of pre-Pennsylvanian. The amount of closure increases with depth, amounting to about 150 feet on the Wilcox sand. Depth of producing sands ranges from about 2,000 to 3,800 feet. The total production of the field by the end of 1926 was 4,566,800 barrels of oil, or more than 11,000 barrels per acre.
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