The origin of oil remains only a theory, and probably will always remain so, at least for our lifetimes. We can't recreate it in the labs so far. The best theory we have so far is that it was created from organic matter, usually decayed sea life, fish poop, and other nutrients which are continually deposited in the mud off the former coastline. As land masses lifted and sunk over the eons, the beaches continually moved inward or further out into the ocean. The beaches would create sand deposits which would bury the mud. The same principle would repeat itself many times.
The weight and pressure of the repeated deposits transformed the mud into shale, and the coastline into sandstone. Reefs were buried and compressed.
Somehow, over time, the organic material in the shales was tranformed into oil and gas which began seeping toward the surface. In those places where it was trapped in porous rocks or reefs, it has stayed until we find it today.
I think your offer, COB1, of a steak dinner for someone who can find deep oil is safe. If the Gomez field near Pecos, Texas, was gas then all such deep wells will be. The Permian Basin has cool rocks. Other places don't even have natural gas at those depths. It's so hot that the only gas that can exist is hydrogen sulfide (a few whiffs and you're dead) and carbon dioxide.
The idea that oil somehow survived those temperatures and moved up to shallow traps is fairly ridiculous.
I agree, Dog Gone.
Thank you for sharing your knowledge.