The West Duncan field is located in parts of T. 1 S., Rs. 8 and 9 W., Stephens County, Oklahoma.
This asymmetrical structure was initiated during the Wichita Mountains disturbance in early Pennsylvanian time, and was directly affected by the Arbuckle Mountains disturbance occurring in late Pennsylvanian time.
The field has been producing oil and gas since May, 1919, from Pennsylvanian and Permian sandstones, 1,400 to 2,500 feet in depth.
Faulting is indicated along the northwest flank of the structure.
Approximately 1,500 acres have produced 6,500-8,200 barrels of oil per acre to date.