Very nice.  I think this gives a more realistic description than the Hubbert curve.
Judging how realistic it is might better be done by running a few country curves through the method.  Hubbert linearization works pretty well on many of them that have passed peak.  Do loglets do as well?

Mark Folsom

The HL does pretty well on some but not not so well on others. I'm planning to test this method on other countries in a next post.
It's as realistic as any other extension of curves without a proof of the underlying laws of nature: not very realistic. Isn't it strange that there are lots of smaller loglets in the left (past) part of the curve, but not a single one in the future? The loglet analysis misses all the future small loglet curves that have not started yet: arctic oil, widespread CO2 injection etc.

If you do a country analysis, try and make a prediction for the North Sea or Britain with the data up to 1990, 1995, etc. and checck how the predicted values change.