Perhaps I was not clear. This graph you are sharing is shale oil, not the pure stuff found in oil shales. Regular oil production reached peak in 1970. We invented new sources that were considered untappable because of the expense of extracting it at one point. I'm not saying this is bad, I'm just saying that peak oil, as it was originally defined, is very much a real thing.
On the plus side for oil enthusiasts, we will probably not run out of the more dirty variety for quite some time.
https://en.wikipedia.org/wiki/Peak_oil#/media/File:Hubbert_U...
(also see article refered to by this)