Petroleum is of inorganic origin, the organic theory of the origin of petroleum was only formulated to make us believe that petroleum is scarce.

Saturn's moon Titan is full of hydrocarbons, hydrocarbon seas and I believe that there were no dinosaurs there.

Dmitri Mendeleyev, creator of the periodic table, was the first or one of the first to formulate the inorganic theory of petroleum, the rest is history of manipulation.