Enhanced oil and gas recovery in Michigan: Columbus 3 Unit

The Columbus 3 Unit located in St. Clair County is an example of a successful pressure maintenance project. The Columbus 3 field, new unitized, produces from a Niaguran reef developed during Silurian time. The incremental gain of 64% in excess of anticipated primary production is generally the result of more efficient production of the field, achieved through selective production of the best wells as permitted through the unitization agreement. As of May 1978, total field production per 1 psig pressure drop has been 10,300 barrels of oil. 5 figures, 2 tables.