Oil business parti

Most geologists believe that oil is of organic origin, i.e. (that is), it originated from decomposition of mainly marine animals and plants buried under thick layers of mud perhaps as long as 400- 500 million years ago. These deposits rich in organic material became the source rocks (sedimentary rocks) for the generation of crude oil. High temperatures and pressures in the sedimentary rocks caused chemical processes that, in turn, resulted in the formation of a waxy substance called kerogen. When heated to a temperature above 100° С kerogen is separated into a liquid (oil) and gas (natural gas). The chemical composition of petroleum is principally hydrocarbons, although a few sulphur-, nitrogen-, and oxygen-containing compounds are usually present.