DEVONIAN OIL AND GAS PLAYS OFTHE MICHIGAN BASIN

摘要

1. Devonian Reservoirs in Michigan represent about 45 % of the oil production and 50% of the natural gas production all time from the State. 2. Total oil production exceeds 585 million barrels, Gas production exceeds 3.8 TCF 3. Reservoirs are mostly found in Carbonate rocks, with dolomitized reservoirs generally be higher quality, but some Limestone zones maintain porosity and permeability due to specific original depositional facies 4. The Antrim Shale is the only non-Carbonate producing zone in the Devonian of Michigan 5. Secondary recovery has been attempted in the oil reservoirs of several plays with good results in some units and poor performance in some others