Columbus 3 unit. Enhanced oil and gas recovery in Michigan

The Columbus No. 3 unit located in St. Clair County, Mighican, is an example of a successful pressure maintenance project. The success of such a project most often is realized through the maintenance of reservoir pressure by the injection of gas and/or water into the reservoir. However, in the case of the Columbus No. 3 unit, 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.