"This Bureau of Mines report tabulates data on nitrogen-gas reservoirs and isolated occurrences of inert gas s in several Williston basin oilfields. Recoverable reserves of nitrogen gas in the Minnelusa nitrogen interval within the areas of five oilfields on the Nesson anticline in North Dakota are estimated at about 1.27 trillion standard cubic feet, based on computer analyses of logs from over 300 wells. This volume of nitrogen represents a large source of high-pressure inert gas and warrants consideration of possible application in oil-production operations. Drill-stem tests made in two of the fields indicated that nitrogen can be produced at rates up to 28 million cubic feet per day."