Definition - What does Petroleum mean?
Petroleum or rock oil is a form of liquid that is found in the earth’s surface. This liquid fossil fuel is usually of yellow-black color. The liquid is composed of hydrocarbons and many other organic compounds that have varied molecular weight. Petroleum is extracted in its raw form through the drilling process and thereafter sent for refining.
Petropedia explains Petroleum
Petroleum is a fossil fuel and is made when dead organisms such as algae, sea plants and zooplankton, etc., are buried below the sedimentary rock layer in the earth’s surface. Under the layer, these organisms are exposed to extreme pressure and heat. After that, these substances transform into hydrocarbons and it takes millions of years for petroleum to form. This rock oil is extracted through oil drilling process. Once extracted, petroleum in its raw form is referred to as crude oil and can be either green, black, clear in color or can be even like tar or gasoline.
After the refining process, which is mostly distillation, the petroleum is then used for manufacturing of a wide variety of materials.