I find it amazing that so much of the peak oil arguments come from looking at production in the USA, and also from seemingly looking only at production of light sweet crude.
Production in the USA is much harder now because of environmental regulations. These drive up costs and naturally would result in companies going offshore to produce... Yet I bet if you looked at proven reserves in e USA you might see a different figure.
Especially if you include forms other than light sweet crude. This easy oil is cheapest to refine but it is just one grade of oil, with many heavy grades going all the eay in to oil shale and coal tar and oil sands..... And the reserves of these types of oil are massive in the USA and staggering in Canada.
Further exploration is very difficult and banned for the Americas richest locations, such as ANWR. Before it was cut off from exploration, I believe many geologists believed that north of prudhoe bay there was more oil than was found in Saudi Arabia, and at the time they were keeping it under wraps as strategic reserve..... Now we pretend like it doesn't exist.
Finally peak oil is based on the theory that depleted fields never produce again, while I understand there are many fields that were previously depleted that refilled while lying fallow for several decades. It is possible that oil is actually a natural product of geological forces, not ancient plant matter, and that most fields will refill over time.