@Rockman
This will expand on my previous note relative to EROEI. If we are looking at the thermodynamic benefits of oil, then we really need to look at the total picture, from reservoir to turning wheel and through the economy. The ETP model attempts to do that.
One of the sub-metrics is the EROEI at the well-head. It is possible for the well-head EROEI to go up, while the total thermodynamic benefits are going down. Let me give you an example (while admitting that I am certainly not a petroleum or refinery professional.)
The first exhibit is from a post at Alice Friedemann’s site:
http://energyskeptic.com/2016/difficult-oil/The basic notion here is that as the product presented at the refinery diverges from what we have classically considered as ‘oil’, then things get more difficult and the solution generally involves additional processing steps which require both money and energy.
The second exhibit is here:
http://www.aogr.com/web-exclusives/excl ... l-refiningSee figure 1. As a rule, the Vacuum Gas Oil (VGO) declines as we move from the light-tight oils on the left to the heavier oils on the right. (Click to enlarge). It’s my understanding that the VGO is cracked to produce both gasoline and diesel.
In short, it seems that the light-tight oils tend to produce more naphtha and less diesel, kerosene, and gasoline. Since naphtha is not a transportation fuel, it sells for considerably less. So processing the light-tight oil is more expensive and give a less energy dense output at increased cost and reduced revenue. If my understanding here is correct, then it corroborates Mr. Hill’s charts which show declining yields in the refineries as the percentage light-tight oil increases.
So while wellhead EROEIs might conceivably be going up as fewer of the less productive wells are drilled, the total thermodynamic benefits afforded by the products presented at the refinery could still be going down. Whether light tight oil is worth producing at all would depend on a study of the total thermodynamic benefits from reservoir through processing through use in an internal combustion engine and then through the economy. I have never seen such a study restricted to light-tight oil. (And Eagle Ford is not like Permian which is not like Russian or Argentinian). However, it seems unlikely that light-tight oil is as profitable (both economically and from a thermodynamic standpoint) as traditional crude oil.
Again, I’m not an expert….Don Stewart