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It may also include minor organic and inorganic chemical substances chemical substances (usually < 7% in weight).
The total range of oil density densities is often classified in narrow the following sub-ranges:
Fig. 1 – A range of different gravity oil compositions from heavy at left to the light at right ( Dubost et al (2007) in SPE-108494 ). One can see how the colour is changing from dark brown for Black Oil (at left) to the light yellow for Volatile Oil(at right). |
In case Oil does not contain dissolved gas it is called Dead Oil otherwise it is called Live Oil.
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