Abiogenic oil

Larry writes:Furthermore, if more recently developed theories of oil formation are correct, and oil is not of biological origin, we may have used only a fraction of the total oil that is available.

I’ve never believed that oil was a byproduct of dead dinosaurs or whatever the common understanding is. For one thing, unless there was a secret dinosaur graveyard to which all dinosaurs in a 1,000 mile radius went to die, the non-random placement of oil fields made no sense. I know literally nothing about the subject, but the usual layman’s notion never made any sense to me.