Question

how is petroleum formed? How do we obtain it?​

Answer 1

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Petroleum is a fossil fuel, meaning that it has been created by the decomposition of organic matter over millions of years. Petroleum is formed when large quantities of dead organisms–primarily zooplankton and algae–underneath sedimentary rock are subjected to intense heat and pressure.

Answer 2

Answer:

Petroleum, also called crude oil, is a fossil fuel. Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria. ... Petroleum reservoirs can be found beneath land or the ocean floor. Their crude oil is extracted with giant drilling machines.