But surely this is just Montana, right Bob? You don't mean to suggest that the entire Bakken formation, including North Dakota -- on which so many North American projections centrally rely -- is in trouble, too? Sadly, that is precisely what Brackett means. In fact, he has quantified the Bakken's production trajectory. The key number is six - that is the longevity of a Bakken well before it turns into a "stripper," industry argot for a worn-out nag producing just 10 or 15 barrels a day, from 400 barrels a day at its peak. Right now, just 200 modern Bakken wells are strippers. But in roughly six years, there will be 4,000 of them, Brackett says. "All good things in the oil patch come to an end," Brackett told me. "In the case of North Dakota, that is a long time -- years -- off, but even that too will suffer the same fate" as Montana.