I'm not aware that the Middle East has doubled its reserves in the past 20 years, so I can't really give an opinion. Even if it's true, it could be simply a recalculation of reserves using better reservoir analysis. If it's new oil seeping in from below, that would be detectable by a change in the characteristics of the oil, as at Eugene Island 330. I've heard none of that, although I'd certainly like to learn more.
I do know that no self-respecting geologist would attribute any oil to the decomposing remains of dinosaurs, who lived and died long after the oil-bearing rocks were deposited.