Going by:
http://www.doi.gov/news/030312.htm
ANWR can only produce 1,400,000 barrels a day, otherwise known as way less
then our middle east imports.
I very strongly suspect that the 1.4mbpd figure is an economically viable
figure. Given that oil prices have more than doubled since the release date
of that document (March of 2003), I would expect there is more than 1.4mbpd
of economically viable oil today.
Additionally, it is very difficult to be sure how much oil is really there.
Measuring expeditions have been limited, and the figures vary wildly among
the estimates that have been taken.
I will say, however, that I recall the 30 year replacement of all middle
east oil being an optimistic figure.
Greg