Well, it seems that the money from $90 oil has to go somewhere and quite a bit of it, $5.28 million to be precise, went from Sinclair Oil to the federal government at the BLM lease sale today for a 320 acre tract in Mountrail Co. That's a $16,500/acre bonus. This kind of stuff isn't sustainable, if you ask me (and nobody has by the way).
Based on this, I suppose the company is offering private mineral owners, what, about $10K/acre? Actually, probably more a like a couple hundred dollars.
Be sure to see the comments left by Larry and roccojoco for some useful information.
(The article has confusing language so that it may seem like it is referring to a purchase of the mineral rights, but it was a lease and not a purchase).
KTVQ in Billings
Minot Daily News (changed from Grand Forks Herald as the link went dead).