The geochemical composition, API gravity, sulfur content and asphaltene content were determined for the crude oil samples collected from Gharib-164, Gharib-163, Gharib-106, Gharib-116 wells within the Ras Gharib oilfield located in the central Gulf of Suez. Saturated hydrocarbon fractions were subjected to gas chromatography and gas chromatography–mass spectroscopy in order to characterize the type of organo-facies, oil classes and depositional environments, as well as, to assess the thermal maturity level for oil generation. The results showed that the studied oils are belonging to normal oils classes with no heavy biodegradation. Also, the crude oils are more mature and sources derived mainly from mixed organic sources from terrestrial and marine inputs contribution to the biomass from algae and plankton in different saline environments.
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