https://peakoil.com/geology/abiotic-oil-and-gas-a-theory-that-refuses-to-vanish

In the West it is almost universally held that all oil and gas is derived from fossils. This is not the case elsewhere, particularly among Russian and Ukrainian scientists who have, over several generations, tenaciously propounded the notion that oil and gas are abiotic, can be found deep below the surface of the earth in most parts of the world and in very large amounts.

https://rense.com/general67/oils.htm