Shale oil production in North Dakota and Texas increased by more than 78,000 barrels per day (bbl/d), or 3.1%, in August, according to analytics and forecasting unit Bentek Energy.

Eagle Ford oil production in South Texas was 37% higher than in August 2013—just short of 400,000 incremental bbl/d, according to Jack Weixel, Bentek Energy director of energy analysis.

“This production is important to sustain storage levels at Cushing, Okla., in the face of higher refinery demand in the U.S.,” said Weixel. “Bentek estimates that from August 2013 to August 2014, total U.S. crude oil production has increased by over 1.5 million bbl/d.”

Oil production in the North Dakota section of the Bakken Shale in the Williston Basin averaged about 1.2 million bbl/d in August, according to Bentek. This was 227,000 bbl/d more than August 2013 levels.