OK, first let's look at the issue of abiotic oil. If this theory is true, then clearly we are in a different situation because almost all of the depletion analysis is based on the traditional theories of oil formation. The rate of replenishment of oil reserves then becomes a key issue, in much the same way as it becomes an issue with soil erosion (where the figures are not good, soil is replenished on average 40-50 times slower than it's eroded under agricultural conditions)
In any case, I still don't have a strong opinion about abiotic oil theory and I'm slightly suspicious that this may be another Russian scientific hoax like Dr Podlenkov the anti-gravity guy or the famous 1000mph Soviet racing car. So I'll suspend any judgement on that one until I've read enough to have a view.
So, meanwhile, let's have a look at what Odell, McCabe et. al. are saying about oil depletion. Odell's basic argument, given in your link above goes like this. (Please let me know if you think I'm substantially distorting it here)
Demand projections over the long term are around 2% and some of the more alarmist members of the depletion crowd, especially back in the 70's (which is when Odell made his rep for debunking environmentalist fears) made much higher projected growth assumptions in their scenarios.
For supply to be able meet demand, as Odell
assumes in the link above it will, then non-conventional sources (tar sands, shale oil etc) will have to come online in increasing amounts, in addition to natural gas, to replace some conventional oil over the course of this century. Eventually in Odell's scenario, renewables will come to play an increasing role, although he seems to believe that this may require government intervention in markets in order to bring them online faster than market forces would, in response to concerns about e.g. climate change.
Odell makes some key assumptions. First, he assumes that declared reserves are believable (Campbell et al point out that there are plausible political and economic reasons why they may not be believable and we've seen some big downward adjustments in recent months.) Secondly he assumes that beyond 2010 the underlying price trend (ignoring e.g. situation in Iraq and other political disturbances to supply) will rise to pay for the necessary investments to make non-conventional oil viable. He assumes that such improvements are technically feasible, or will becomes so when the 'price is right'.
Now as I mentioned earlier,
Greene et al (pdf!) have done some interesting heavy duty scenario based modelling in which they take sets of assumptions derived from Campbell et al and those derived from sources that Odell, McCabe et al would prefer to believe and comparatively model them. They do this without reference to geological constraints (especially, without using Hubbert curves or similar methods) but instead use models based on R/P ratios and so on, of the sort Odell seems to prefer, with a range of a dozen demand scenarios, including Odell's 2% limit.
Using this approach, based on Cambell's pessimistic reserve data we get a peak for non-Middle East oil before 2010 but interestingly, the mean values using two mainstream data sets (Rogner and USGS) for non-Middle East conventional oil peak at best a couple of decades later, from 2010-2040.
They also conclude that non-conventional oil must start coming rapidly online, in the median scenarios by about 2020. This is where technological optimism of the sort Odell implicitly assumes regarding non-conventional supplies becomes really quite important. If we're talking, as the Greene models suggest about a 7-9% per annum transition to non-conventional starting around 2020. If Middle East conventional remains dominant into the 2050s, I can forsee a number of possible concerns about price and supply in relation to demand, even if demand remains relatively modest at Odell's 2%.
As you may be aware, I'm particularly concerned about the impact of even small changes in price and availability over the long term, because of their effects on our global food systems. So for me, this is still rather worrying.