Abstract
Nigeria light, medium, and heavy crude oils were categorized based on the ratio of vanadium-to-nickel (V/Ni) and the ratio of phenanthrene-to-dibenzothiophene (PHEN/DBT) derivatives. V/Ni ratio of 0.47, 1.36, and 2.77 were observed for light, medium, and heavy crude oils, respectively, while the PHEN/DBT ratio was observed to be 8.35, 4.33, and 1.09 for the light, medium, and heavy crude oils, respectively. From the results obtained, light crude oil was suggested to originate from marine organic matter while the heavy oil originates from the terrestrial organic matter.
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