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AAPG Bulletin

Abstract


Volume: 26 (1942)

Issue: 9. (September)

First Page: 1467

Last Page: 1516

Title: Schuler Field, Union County, Arkansas

Author(s): Warren B. Weeks (2), Clyde W. Alexander (2)

Abstract:

The Schuler field, 18 miles west and south of El Dorado, Arkansas, was discovered on April 6, 1937, by the Lion Oil Refining Company and Phillips Petroleum Company's Edna Morgan No. A-1, Sec. 18, T. 18 S., R. 17 W. The field is on an anticline on a southeastward-plunging Upper Cretaceous nose. The deeper structure was determined by seismic exploration by the Phillips Petroleum Company, who commenced the discovery well. The well was later deepened and completed in partnership with the Lion Oil Refining Company.

The first well was completed at a depth of 5,559 feet, in a sand which was found to be the upper of several lenticular producing sands lying within a zone of 500 feet near the top of the Cotton Valley formation of Mesozoic age. Of the 15 wells completed in this Morgan Sands zone, four have since been deepened. The zone produced 2,141,040 barrels to July, 1941.

E. M. Jones et al. found deeper production in September, 1937, at a depth of 7,616 feet in a sand at the base of the Cotton Valley formation. This Jones sand, with an average thickness of 65 feet, is productive over a much greater area than is the upper zone. Approximately 4,000 acres had been proved for production by July 1, 1940. By July 1, 1941, this sand had produced 18,542,590 barrels of oil from 146 wells.

The original discovery well was deepened and recompleted on October 22, 1937, at a depth of 7,688 feet, as a gas and distillate well from still a third zone, the Reynolds oolite of the Smackover limestone. By the end of that year this well had produced 34,028 barrels of distillate and 800 million cubic feet of gas. In March, 1938, the Marine Oil Company completed the Justiss No. 4 as an oil well in this zone. Subsequently, by July 1, 1941, this oolite zone had produced a total of 2,766,280 barrels of oil from 16 wells.

On June 22, 1941, the Phillips Petroleum Company et al. Leona No. 1 was recompleted, pumping 70 barrels of oil per day from the Leona sand at 6,922 feet, after having been plugged back from the Reynolds oolite. By the end of the year two other wells had been completed in this sand.

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