Also, almost everyone also seems to agree we've run out of the cheap and easily-extracted oil except possibly in Saudi Arabia, that refineries are running at capacity right now and take a long time to build, and that the oil coming out of the ground is increasingly sour and requires more refining and more expensive refineries to do it.
I look oil supply projection graphs like this one from the EIA (conveniently their projection stops at 2025, when they're projecting peak oil) and wonder, how does souring figure into the picture?
![Image](http://www.eia.doe.gov/oiaf/ieo/images/figure_32.jpg)
I assume the EIA is full of competent, smart people who figure out an oil "souring curve" indicating how the percentage of light sweet to heavy sour rises over time, and have a ratio of how many barrels of heavy sour = a barrel of light sweet, and use both those factors in their projections. Also, if future oil increasingly requires more expensive infrastructure investment like sophisticated refineries, do they count the cost of infrastructure against the benefit of the oil gained? Since the accompanying article doesn't mention it, I wanted to ask y'all if these sorts of peak projections do take that into account, or if I'm misunderstanding the situation and they're not really a big factor.
Thanks,
Ketzl