Oil production in the Eagle Ford shale formation of southern Texas topped 310,000 barrels a day in July.
The nine fields that make up the majority of the 400-mile-long (644-kilometer) play pumped out 310,370 barrels a day, preliminary data on the Texas Railroad Commission’s website showed. That’s up from a revised count of 309,979 barrels a day in June, and 120,532 a day in July 2011.