This is a similar article to the one below but here's an additional view of an opponent to the Deffeyes' view:
Mark Mills, co-author of the new book "The Bottomless Well: The Twilight of Fuel, the Virtue of Waste, and Why We Will Never Run Out of Energy," said Deffeyes is smart about geology, but wrong on this issue.
Higher prices will merely spur humankind to figure out how to extract oil from previously impenetrable sources, such as the oil sands of Canada, he said.
"I don't propose that there's an infinite supply of oil," said Mills, a physicist and partner in a venture capital fund. "I just propose that there's a lot more than most geologists would believe because the real metric of availability is technology, not geology."
...Saying that mankind will figure out how and saying mankind has already figured it out are two completely different things.
Common comeback #123: "Technology will save us".......ok we'll wait and see. We've only been waiting for 30 years or so.