Enhanced oil and gas recovery in Michigan: Enterprise Field

The Enterprise Oil Field of Missaukee and Roscommen counties is a successful Richfield interval waterflood project, indicated by the fact that oil production has exceeded expected primary production estimates by 42% as of 1975. In the Enterprise Field the oil production is obtained from nine dolomite stringers located immediately below the massive anhydrite and separated by either anhydrite or dense limestone. The vertical succession of the reservoir rocks and in impervious evaporites within the Richfield interval is an important element in the success of the waterflood project. 4 figures, 2 tables.