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  2.2  BIFURCATED Correlation of Oil's Chemical Properties
              with Asphaltene Content

    Publications on correlations among various properties of crude oils reveal that the amount of asphaltene is a significant variable in all cases. In particular, it has been repeatedly stated that generally an increase of asphaltene contents is accompanied by; 1) a decrease of a content of saturates and 2) an increase of a content of resins.

    We have performed a detailed analysis of databases for more than 390 world’s recovered (dead) crude oils. For saturates and resins the analysis revealed a definite absence of frequently assumed general correlations with asphaltene content and the existence of two distinct types of world’s crude oils as classified with respect to their asphaltene-based correlations.  Moreover, these two types of oils possess different correlations of asphaltene content with H/C ratio  (inverse measure  of oil's aromaticity).


Bifurcated correlations of saturates and resins with asphaltenes for world's crude oils.
(Smoothened general trends)


Bifurcated correlation of asphaltene content with aromaticity for world's crude oils.
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      Last Update : 06.04.2005