Funny you should mention that. I quizzed a buddy of mine who consults to the trade at the highest of levels on a worldwide basis and asked him if he really thought that oil was a fossil fuel.He had to think a while and then smiled.
Just think of the magnitude of it...all the “green-water” ocean in the world. A giant biofuel-producing aquaculture mechanism.
The sun causes all that biomaterial to grow and capture hydrogen and carbon. It all sinks into the depths....then what happens to it?
There’s probably so much oil “down there” that humans could never use it all....no matter how large the population.
We just need to start exploring “inner space”.