Abstract: North Tisdale Oil Mine, Johnson Co., Wyoming

By

Harry J. King

The North Tisdale anticline was drilled by Conoco Inc. first in 1952. Unfortunately, the structure had been breached by erosion and the solution gas had escaped long before. Many million barrels of oil had been left behind without sufficient energy to enter a borehole. The increasing value of oil made the recovery of this oil viable, and a unique method of liquid oil recovery was begun.

An adit was driven into the reservoir and the liquids drained into a gallery for recovery. Color slides provide the opportunity to view the inside of this producing oil reservoir. Also, revealing information about perforating and cementing techniques can be gained by studying the results in this mine. The practicality of mining liquid oil, despite the problems associated with such an operation, adds another dimension to recovery of more of the oil left in the ground by conventional recovery methods.

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