According to EIA’s recently released Petroleum Supply Annual, U.S. field production of crude oil increased in 2015 for the seventh consecutive year, reaching 9.42 million barrels per day in April of that year. This was the highest crude oil production level since 1972.

2015 production gains were highest in Texas, the Gulf of Mexico, and North Dakota, with these three regions accounting for 77% of the total U.S. increase.

Although annual production for 2015 grew, monthly U.S. crude oil production has declined since April 2015. Lower oil pr...

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