What does oil natural gas come from?

Answer 1

Oil and natural gas are found in source rocks contained in the earths crust. Source rocks are rich in organic matter which was rapidly buried in quiet, non-areated environments. The organic component through which hydrocarbons are formed is called Kerogen of which there are three types.

Type 1- Saprolitic (marine algae and animals)

Type 2- Mixed (saprolitic and humic)

Type 3- Humic (plants other than marine algae)

Type 1 kerogen originates in marine environments and usually forms liquid hydrocarbons such as oil. Type 2 is a mix between types 1 and 3 and forms both oil and natural gas. Type 3 originates in terrestrial environments and usually creates both coal or natural gas.

Answer 2

Oil and natural gas are formed from the remains of ancient marine microorganisms that were buried beneath layers of sediment millions of years ago. Over time, heat and pressure transformed these organic materials into hydrocarbons, which accumulated in underground reservoirs to form oil and natural gas deposits.