Produced water and oil spilled from a tank at a Williams County well pad this week, and some of the fluid leaked into rangeland, the North Dakota Department of Environmental Quality reported Friday.
The spill occurred 16 miles northeast of Williston on Thursday, the department said. The fluid flowed from a heater treater into a production tank and caused the tank to overflow. The well pad is owned by Kraken Operating.
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Two hundred barrels, or 8,400 gallons, of produced water and oil spilled, according to initial estimates. About 10 barrels leaked off the wellpad. Most of the fluid has been recovered, according to a spill report from state regulators.
Produced water is a mixture of saltwater and oil that can contain drilling chemicals.