The last time the U.S. Geological Survey did an estimate in the Bakken in 2013, it more than doubled the estimate for recoverable oil that could be taken out of the Williston Basin.
That survey said there are about 7.4 billion potentially recoverable barrels of recoverable oil.
It also said there were 6.7 trillion cubic feet of natural gas.
At a confirmation hearing for the nominee to be the director of USGS, Dr. Suzette M. Kimball, North Dakota Sen. John Hoeven, R-N.D., pressed for a new one.
He said the last survey had an incredibly positive impact for the oil development of the region.
"That was very important; both in terms of stimulating drilling activity, further or additional drilling activity in the basin, as well as helping us encourage, and in fact, get the infrastructure development that we needed," said Hoeven.
Kimball says that, if confirmed, she would work with Hoeven to ensure an update.