No thanks. I believe I know where oil and gas come from and it ain’t the mantle. Every known accumulation of hydrocarbons is found in sedimentary basins or their margins. Want to know why no one has ever found oil in Iowa or Minnesota? Or Wisconsin or Maine? Because they have always been “high” and never had much sedimentary cover deposited on them. No source rocks, no oil. You can derive methane from coal beds but those areas also lack those.
So the science is settled then? Dinosaurs and plants turned into oil? You might want to re-open that closed brain of yours and consider that Petrobas finds oil at 46000 feet how did the animals get that far under the ground? The sediments above these finds arent as old as the dinosaurs another hit to your its all dino soup theory. If dino’s turn to oil it wouldnt require sediments a probiotic process would make oil regardless.