The United States’ Antrim shale play cuts a swath across the northern lower peninsula of Michigan with initial production and focus on Otsego County and additional production from all of Antrim and Montmorency counties and northern Kalkaska, Crawford and Oscoda counties.

Production from the Antrim has been reported as far as Alpena and Alcona counties in the east, according to “Modern Shale Gas Development in the United States: A Primer,:” prepared by the Ground Water Protection Council and ALL Consulting for the National Energy Technology Laboratory and the Office of ...