The Bakken isn't shale. And the number of large (and I mean HUGE) pumps going in from Dickinson to Bowman ND is astounding.
The Bakken is mostly oil shale. Less than 1% is produeable by drilling and pumping. Most will require retorting the shale.
That said, the less than 1% has already made North Dakota the 4th largest state in oil production.