Oh, I wouldn't say that. Way back when, the U.S. and the Russians were supposed to fight a war over Middle Eastern oil fields because the Russians didn't have any oil. Didn't have the 'correct' sedimentary layers for oil deposits, 'they' said.
Of course, Russia is a huge oil exporter today because they went for the deep, abiotic oil. It's probably biological oil that is the fairy tale. More likely that oil is abiotic and biologically contaminated rather than biological in origin.
And this deep, ¨abiotic¨ oil came from what type of rock structure? Even without knowing I´d say it´s a 99.9% certainty they´ve tapped a sedimentary unit.
I have Gold´s book on hold at my library. Though I doubt it´ll sway me. But we´ll see.
Yet there is no doubt that biological organisms can manufacture oil as a byproduct.
Not only is there oil at different depths (because it is from different sources), but the oil is different.
Because one is created by biological process, the other is created by subsurface temps/pressures, and matter in a state we cannot even define as of yet.
THE KEY to understanding the abiotic process and it's validity, is to understand WHY the Earth generates oil.