SHARE

For the week ended Dec. 6, U.S. crude output increased to 8.075 million barrels a day, up 0.8%, or 64,000 barrels a day, according to the U.S. Energy Information Administration (EIA).

For 2013, U.S. oil production increased 18%, the fasted growth on record, powered by more efficient extraction shale formations.

Texas and North Dakota now account for about 75% of domestic oil production growth.

Texas is the United States’s top oil producer with about 35% of domestic crude production. The state produced 2.7 million barrels a day in September, the most recent month for which EIA data is available.

In the third quarter, Chesapeake Energy’s Eagle Ford production averaged 95,000 barrels of oil equivalent per day, up 82% year over year.

ConocoPhillips’s Eagle Ford production hit  126,000 barrels of oil equivalent per day, up 66% year over year.

North Dakota’s huge Bakken formation has been in production since 2005.

In October, Bakken production his 940,000 barrels per day, the state’s Industrial Commission reported.

“Continental Resources reported third-quarter net Bakken production of 94,500 barrels of oil equivalent per day during the third quarter, up 7% from the previous quarter. At the same time, the company has slashed its well costs by $1.2 million over the past year and expects a further $500 million reduction per well next year, highlighting the continued success of efficiency improvements,” the Daily Finance said.