I. Curtis Hicks, 1956. "Geology of the Southwest Velma Field, Stephens County, Oklahoma", Petroleum Geology of Southern Oklahoma, I. Curtis Hicks, Jerome Westheimer, C. W. Tomlinson, D. M. Putman, E. L. Selk
Download citation file:
The Southwest Velma field is located in Secs. 34 and 35, T. 1 S., R. 5 W., and Secs. 2 and 3, T. 2 S., R. 5 W., Stephens County, Oklahoma. The productive area is about 2 miles long in a northwest-southwest direction and ¾ mile wide. It produces from five sandstone members of the Springer formation.
The structure is a faulted anticline with the production on the southwest flank. Two faults form the trap, one a major fault along the northeast side of producing area, and an auxiliary fault along the southeast end of the producing area. A third fault within the producing area apparently creates a separation of sources of supply in each sand member.
The structure has been involved in three distinct periods of movement in Pennsylvanian time and is the result of compressive forces acting upon the rocks of the area from the southwest and the northeast. The incompetent shales underlying and between the Springer sandstones yielded to pressure by upward buckling.
The field covers approximately 530 acres and has 55 producing wells. Daily production for the field in August 1953 exceeded 4,000 barrels; total production is over 1,115,000 barrels since the discovery well was drilled in July 1951. Development is continuing to the northwest.
Figures & Tables
Petroleum Geology of Southern Oklahoma
Because of the excellent pioneer work done by Eldridge in mapping occurrences of oil seeps, asphaltic sandstones, and showings in water wells, in southern Oklahoma, and by Taff and Gould on the structure and stratigraphy of the Arbuckle and Wichita mountain areas, there was ample evidence of the presence of petroleum to lure the prospector when Oklahoma and Indian Territories were opened for leasing just after the turn of the century.
About one-fourth the area covered by the oil fields of southern Oklahoma has Pennsylvanian rocks on the surface. This portion has been very well described in the literature. The remaining three-fourths is covered with Permian rocks, the oldest being the upper Pontotoc massive cherty brown sandstones. These are overlain by the Wichita formation consisting of 700 feet of alternating gray sandstones and interbedded purplish-maroon shales and barite beds, and bone beds with the remains of Permian reptiles, sharks, and amphibians. Next above is the basal asphaltic gray sandstone of the Garber formation resting unconformably on whatever may be below it, and carrying the huge “flying saucer” concretions; above which is the remaining 300-foot section of maroon conglomeratic sandstones and shales. The Garber crops out around and over more oil fields than any other formation in southern Oklahoma—like the Mesaverde of the Rockies. Next above is the 400-foot greenish-gray sandy shale section of the Hennessey, followed in turn by the 200-foot maroon sandstone section of the Duncan, the 4oo-foot “purple” shale of the Chickasha, and the 400-foot Whitehorse group. At the top are the Cloud Chief gypsum and the Quartermaster formation.
The conspicuous surface folds along the old lines of weakness prove that the folding at the close of Permian time and again after Cretaceous time was pronounced, supporting ideas of Bullard (1928) and Freie (1930).
From the discovery of the Granite field in 1901, Wheeler in 1905, Cruce in 1906, through Loco and Healdton in 1913, Fox in 1915, Wildcat Jim in 1916, and Velma in 1917, to Robberson in 1920, Sholom Alechem in 1923, and Apache in 1941, most of the fields of southern Oklahoma have been discovered by adhering strictly to common sense rules of oil finding by testing areas of favorable structure close to oil seeps, showings of oil and gas, and asphaltic sandstone occurrences.