Abiotic? My daughter is studying to be a geologist and I asked her what is said about this. She said they haven’t mentioned it. That they only study WHERE and HOW to find oil and gas, not where it comes from. Seems like a no-brainer to me that you would learn that FIRST.
Ask her if oil/gas is ever found sourced outside of sedimentary basins, and what that means to the source of the material.