Fractured hydrothermal dolomite reservoirs in the Devonian Dundee Formation of the central Michigan Basin

The Middle Devonian Dundee Formation is the most prolific oil-producing unit in the Michigan Basin, with more than 375 million bbl of oil produced to date. Reservoir types in the Dundee Formation can be fracture controlled or facies controlled, and each type may have been diagenetically modified. Although fracture-controlled reservoirs produce more oil than facies-controlled reservoirs, little is known about the process by which they were formed...