An alarming state of affairs.  As per the article the flared Natural gas in North Dakota is reported to be 266,000,000,000 cfd (cubic feet per day) flared methane or 2750 x 10(9) cu m/year.

According to Wiki the 2011 US annual consumption for natural gas was 689.9 x 10(9) cu m, so apparently Bakken is actually burning 4 times the total 2011 national requirements.

>Roughly 29 percent of natural gas extracted in North Dakota was flared in May, down from an all-time high of 36 percent in September 2011. But the volume of natural gas produced has nearly tripled in that timeframe to about 900,000 million cubic feet per day, boosting flaring in the state to roughly 266,000 million cubic feet per day, according to North Dakota state and Ceres data.<