Billings Gazette | North Dakota oil production slips in June Billings Gazette BISMARCK, N.D. — North Dakota's oil production slipped in June but remained above 1 million barrels per day for the fifth consecutive month. The Department of Mineral Resources says the state produced an average of 1.03 million barrels of oil daily in ... North Dakota oil production remains above 1 million barrels per day North Dakota oil production slips about 1 percent in June Dakota Access causes shift in oil transport |