North Dakota oil output drops about 40% after blizzard, freeze; restoration continues

North Dakota has restored some of the oil output that was curtailed during the recent blizzard and freeze-offs, but an estimated 40% of production remains down, an official state source said Dec. 27. Oil production in North Dakota is estimated to be 650,000-700,000 b/d as of Dec. 27. Using 1.12 million b/d as the baseline, overall state oil production is…