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Montana Oil And Mining Journal
Great Falls, Billings, Cascade County, Yellowstone County, Montana
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Ohio Oil Company drills and tests Tensleep sand in Dry Creek field to 5050 feet, yielding 25-30 barrels of oil with water; pumping unit installed for further evaluation amid decade-long production from shallower sands.
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After drilling to total depth of 5050 feet, the Ohio Oil company has backed up to the Tensleep sand and is testing at from 4200 to 4250 in its deep test in the Dry Creek field.
Pipe was perforated between those depths with 192 shots and a two-day swabbing test showed 25 to 30 barrels of 28-gravity black oil with from 150 to 200 barrels of water. It was found impossible to lower the fluid level below 2800 feet by swabbing. When shut in, the well will flow a small amount.
Rotary tools are being moved off and a pumping unit installed, to give the Tensleep possibilities a thorough test. Shallower horizons which showed for commercial production, and in which the company has found production in about a dozen wells previously drilled in the field, are still to be tested in this well.
The Ohio has control of the entire field, which has been producing from the Dakota-Lakota sands for more than a decade.
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Dry Creek Field
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After drilling to total depth of 5050 feet, the Ohio Oil company backed up to the Tensleep sand and tested from 4200 to 4250 feet in the Dry Creek field. Pipe was perforated with 192 shots, yielding 25 to 30 barrels of 28-gravity black oil with 150 to 200 barrels of water during a two-day swabbing test. Fluid level could not be lowered below 2800 feet by swabbing, and the well flows a small amount when shut in. A pumping unit is being installed to thoroughly test Tensleep possibilities. Shallower horizons showing commercial production in previous wells are still to be tested. The company controls the entire field, producing from Dakota-Lakota sands for more than a decade.