That's debatable, many scientist are questioning that long held belief, they have seen changes through soil samples to challenge that long held belief that by suggesting 10s of thousands of years and not millions, because the ocean and continental plates are constantly in motion the organic matter is still being broke down and refine, they have seen releases of newly formed pockets in the sedimentary layer and in the granite layer, meaning oil is still being produced at a far shorter period of time.
The Abstract
The deep abiogenic synthesis of hydrocarbons is possible under the conditions of the asthenosphere. We have found that this process can also occur under the mineral and thermobaric conditions of subducting slabs. We have investigated the abiogenic synthesis of hydrocarbon systems at pressures of 2.0–6.6 GPa and temperatures of 250–600 °C. The determined lower thermobaric limit of the reaction at 280–300 °C and 2–3 GPa corresponds to a depth of 70–80 km during cold subduction. The hydrocarbon fluid formed in the slab can migrate upwards through the network of faults and fractures to form petroleum deposits.
View attachment 9148