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Determining oil migration distances from source rocks to reservoirs can greatly help in the search for new petroleum accumulations. Concentrations and ratios of polar organic compounds are known to change due to preferential sorption of these compounds in migrating oils onto immobile mineral surfaces. However, these compounds cannot be directly used as(More)
The fossil remains of euryhaline organisms in the Mesozoic±Cenozoic, non-marine sedimentary records of eastern China may have resulted from either marine transgressions or inland hypersaline lacustrine environments. Paleontological and organic geochemical results of this study have provided new evidence for marine transgressional events in the gigantic(More)
A suite of 10 di€erent marine evaporitic oil samples from Sergipe-Alagoas Basin, Brazil was studied for its biomarker content, in particular its acidic constituents. The oils showed di€erent molecular distributions and relative abundances of n-alkanoic, isoprenoid and hopanoic acids. The observed di€erences were assigned to the incorporation of immature(More)
When compared to the classical silica gel/alumina column chromatographic method, the neutral alumina procedure, recently validated for the isolation of organic nitrogen fractions from crude oils/rock extracts, appears to yield severely altered distributions for many classes of monoaromatic hydrocarbons in the aromatic hydrocarbon fraction. The potential(More)
The application of age-speci®c biomarker distributions established from mature exploration areas of the Tarim Basin, northwestern China, indicates that most Carboniferous±Permian outcrop samples in the eastern segment of the Southwest Depression, previously believed to have signi®cant petroleum source potential, in fact contain migrated hydrocarbons derived(More)
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