Question is in title. My searching is actually rather disturbing this morning as the results are fillled with industry fud and not what im looking for. What im really trying to find is a graph of oil produced historically because I recall we used to get something like a 50 barrel return but now we get single digits.

Edited - thanks for the info. kbin has an issue or at least my account does for some magazines where I can't see any replies when logged in so I can see it from a non logged in browser but can't reply so im replying in my post. EROI fits what I was looking for but if anyone finds a nice historical chart for it specifically with oil that would be great but with the EROI term I think I will be able to find it.