How does oil and natural gas form?

Answer 1

Oil and natural gas forms from the buried remains of living things. The remains take millions of years to change into oil and natural gas.

Answer 2

Oil and natural gas form from the remains of tiny marine organisms that accumulate on the ocean floor over millions of years. As these remains are buried under layers of sediment, heat and pressure transform them into oil and natural gas. The process is known as maturation and occurs in specific geological conditions found beneath the Earth's surface.