Petroleum is a mixture of plant and animal remains compressed together and heated under the Earth's crust. Petroleum occurs naturally as a liquid after millions of years of this process. Petroleum is harvested by drilling into underground wells and then is filtered to become crude oil, which can be converted, once again, into various fuel or household products. These products range from gasoline to asphalt and even include the medicinal compounds created with petroleum jelly.
millions of years
Qatar Petroleum was created in 1974.
Gull Petroleum was created in 1976.
Regal Petroleum was created in 1996.
Aloha Petroleum was created in 190#.
Crescent Petroleum was created in 1971.
Petrolifera Petroleum was created in 1975.
Occidental Petroleum was created in 1920.
Hellenic Petroleum was created in 1958.
Atlantic Petroleum was created in 1866.
Gate Petroleum was created in 1960.
Saga Petroleum was created in 1972.