$90 a barrel oil doesn't mean antyhing other than what it cost at the time based on what other things cost at the time. It is arbitrary in the sense that what was $90 yesterday may not be that tomorrow. Look at all the "half-million dollar homes" in the US now going for less than half that.

All that matters is EROEI. If it is positive, the field will be developed, though that is not to say that it won't be post-peak/post-collapse.

>All that matters is EROEI. If it is positive, the field will be developed, though that is not to say that it won't be post-peak/post-collapse.<

It would be logical if there is a correlation between long term prices and EROEI. I am going to research this in one of my thesis works in the next months.