Oklahoma City Oil Field

[1] The discovery well, the Indian Territory Oil Illuminating Company (ITIO) and Foster Petroleum Corporation Oklahoma City Number 1 well was drilled on a surface anticlinal structure in the Garber Sandstone of Permian age[2] and was completed in the Cambro-Ordovician Arbuckle Limestone for an IPF of 6,564 barrels (1,044 m3) of oil per day at a depth of 6,624 feet (2,019 m).

Subsurface mapping of the field demonstrated that the producing north-south trending anticlinal structure is bounded on the east by large normal fault with over 2,000 feet (610 m) of throw.

Stratigraphically, the Oklahoma City anticline is a "bald-headed structure" with a major unconformity at the base of the Pennsylvanian sediments.

[4] The vertical normal fault bounds the anticline on the east side and the displacement of about 2,000 feet (610 m) occurred simultaneously with the folding, forming a structural trap.

[5] The top of the structural trap is marked by a pre-Pennsylvanian unconformity with sediments subcropping against the Oswego Lime.