if you mean how oil was originally created it was created from dead organic material buried under sediment for millions of years. The heat and pressure turned it to what it is today. Some people might have you believe that oil is a by product of earth as it was found 4 miles below the surface and no organism big or small can reach there. But the fact is that it was millions of years ago, the geography was different and we do not know how the terrain was at that time.
Exxon Oil.
an embargo from Arab countries, created shortage
The Gulf War oil spill occurred on January 23, 1991, and was the largest oil spill to date. It was the largest purposely created oil spill in history.
1977 after an oil crisis on August 8
The Exxon Valdez.
Oil Barons was created in 1983.
Duke of Oil was created in 1986.
Marathon Oil was created in 1887.
Schaeffer Oil was created in 1839.
Skelly Oil was created in 1919.
Maersk Oil was created in 1962.
Irving Oil was created in 1924.
Enterprise Oil was created in 1983.
Burmah Oil was created in 1886.
Oil's Well was created in 1983.
Pet'r Oil was created in 1980.
Imperial Oil was created in 1880.