Petroleum may be a present liquid found beneath the surface which will be refined into fuel. Petroleum may be a fuel, meaning that it's been created by the decomposition of organic matter over many years. Petroleum, also called petroleum , may be a fuel . Like coal and gas , petroleum was formed from the remains of ancient marine organisms, like plants, algae, and bacteria.It consists of present hydrocarbons of varied molecular weights and should contain miscellaneous organic compounds. The name petroleum covers both present unprocessed petroleum and petroleum products that are made from refined petroleum . A fuel , petroleum is made when large quantities of dead organisms, mostly zooplankton and algae, are buried underneath rock and subjected to both intense heat and pressure.

Petroleum has mostly been recovered by oil drilling (natural petroleum springs are rare). Drilling is administered after studies of structural geology (at the reservoir scale), sedimentary basin analysis, and reservoir characterisation (mainly in terms of the porosity and permeability of geologic reservoir structures) are completed. it's refined and separated, most easily by distillation, into numerous consumer products, from gasoline (petrol) and kerosene to asphalt and chemical reagents wont to make plastics, pesticides and pharmaceuticals. Petroleum is employed in manufacturing a good sort of materials, and it's estimated that the planet consumes about 95 million barrels every day .