Neither is natural gas. The correct term for both is 'abiotic hydrocarbon'. They're still being made beneath us for our bounteous use.

When paid liars drone on about 'carbon capture and storage' (CCS), it belies the fact that oil, coal & gas are embodiments of CCS. We get them for the price of recovering them because the sun and gravity (heat from Earth's core) has done most of the work.