Peak oil has nothing to do with abiotic oil. The original reserves of oil in the contiguous 48 US states took 4.5 billion years to form and have been extracted, going through a Hubbert peak, in about 100 years. That gives you an idea of the rate of production of abiotic oil. Might be renewable, but at a ridiculous rate.

With non-renewable resources, the limiting factor is the rate of extraction. With renewable resources, the limiting factor is the rate of natural replacement. If abiotic oil had anywhere near the rate of natural replacement to be useful, there would not have been a Hubbert peak in the US in the 1970's.

Nothing is 'mere'. — Richard P. Feynman