[Kye]

That's the question. How much makes it to the surface? Oil used to pop up everywhere before humans sucked up all the easy to reach surface sources. There's still a little that comes up from the ocean floor without any human help.

https://response.restoration.noaa.gov/oil-and-chemical-spill...

Why would it be different for other things created by the same processes? And do the pipes let less leak out than if we just left it in the ground?

[mattbk1]

This source suggests that geological methane emissions are about 40% of total emissions: https://phys.org/news/2021-03-natural-geological-methane-emi...

Oil and gas seeps notwithstanding, the vast majority of reservoirs are stable and likely to remain so over human timescales unless we stick wells into them and start piping fluids around on the surface.