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Submitted Chris Haslego, Nov 21 2011 11:21 AM | Last updated Nov 21 2011 01:29 PM




Category: Refining
Question: How many different types of crude are there in the world?
Keywords: crude,oil,types
Answer: There are hundreds of different crude oils, perhaps even thousands. Some crude oils have lighter specific gravities than others, some have a lower total sulfur content than others, some can be refined to produce more gasoline than others, some have lower pour points than others. The physical properties of any specific crude oil are obtained by a series of laboratory tests which result in what is called a "crude oil assay". Some people classify crude oils as: paraffin base; naphthene base; aromatic base; asphalt base; or mixed base. The general elementary composition of crude oil falls within these approximate weight percent ranges: Carbon = 80 to 87, Hydrogen = 11 to 14, Nitrogen = 0.2, and Sulfur = 0 to 3.


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