FYI, Original Oil In Place (OOIP) is not the same as reserves. Reserves are the volume of economically recoverable oil that is a fraction of OOIP. The Ultimate Recovery Factor (URF)is the % of OOIP that tells you what the reserves are. Typical worldwide URF for conventional reservoirs is ~35%. For unconventional reservoirs like the Bakken, URF may be more like ~5% to 10%. And due to the low permeability of the Bakken, recovery rates are low. One saving grace is that the oil is low viscosity, light oil.
Yes, money is being made in the Bakken. And yes, people and companies who stuck with the play are getting what they deserve for their foresight. But the Bakken production will have only a little impact on U.S. oil economic picture and need for oil.