CRUDE OIL

The liquid composition of crude oil is placed below the surface of the Earth and its physical characteristics (density and viscosity) are really variable. 
Crude oil is directly extracted from the oil dwell without any treatment. It has a dark brown colour: the more the hydrocarbon in its composition, the darker the colour. It is composed of carbon (85%), hydrogen (13%), and oxygen, nitrogen and other metallic elements (2%).
Editor: Claudio DICEMBRINO
© 2009 ASSONEBB