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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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A chemical correlation has been made for oils produced from strata ranging in age from Carboniferous to middle Miocene. The correlation parameters used are carbon isotope ratios of C15+ fractions, difference between carbon isotope ratios of C15+ saturates and aromatic fractions, and the ratios of pristane/phytane, pristane/normal heptadecane, phytane/normal octadecane, and (pristane + normal heptadecane)/(phytane + normal octadecane).
The values of (pristane + normal heptadecane)/(phytane + normal octadecane) and carbon isotope ratios of C15+ fractions are found to be the most useful in oil-oil correlation. However, the difference between carbon isotope ratios of C15+ saturates and aromatic fractions can be used to differentiate the different producing strata. The other parameters are affected in different magnitudes by depth and age of the producing formation.
It was found that the analyzed oils most likely have stemmed from a common or very similar source rock of marine origin.
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