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. Sub-surface 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.
Figures & Tables
Modern petroleum geology in the United States had its beginning in the first decade of the 20th Century when the U.S. Geological Survey began mapping the structure of the rocks in and near old fields in order to discover the various types of structural conditions under which oil and gas are trapped. Structural geology has evolved as a branch of the broader science far more rapidly than have methods of mapping the attitude of rocks at the surface. This volume, published in the late 1920s, was designed to afford authoritative and modern descriptions of the structure of typical oil fields in the United States. Each of the 30 fields contained here is described by an author who is intimately familiar with the available data. The relationship of structure at the surface and at depth for different terranes is clearly set forth wherever the strata are not parallel. Fields include: McKittrick, California; Fairport, Kansas; Urania, Louisiana; Artesia, New Mexico; Burbank, Oklahoma; Cabin Creek, West Virginia; and Luling, Texas.