Me for one. I've done the math.
If the earth produced oil at the current rate of oil consumption for 400 million years, the volume of oil would cover the earth 6 miles deep.
How about 6,000 years? ;-)
Re-read what you just said....
Rather than a refutation of abiotic oil, your claim of a layer of oil 6 miles deep is so. It's just 6 miles (and much more...) UNDER ground, not above ground as your example assumes.
AV- Seimographic exploration ship capt. Alaska, S. America E & W coasts, US West coast, Gulf of Mexico, Bahamas & Caribbean. Oil structures were everywhere we looked.
The Earth indeed does not have a layer of oil 6 miles thick- it's thicker!