Isotopic Study of Bangestan Reservoir Crude Oil in Some of Abadan Oil Fields, SW Iran


1 Department of Geology, Faculty of Earth Sciences, Shahid Chamran University of Ahvaz, Iran Petroleum Geology and Geochemistry Reserch Center (PGGRC ), SCU, Ahvaz, Iran

2 Department of Geology, Faculty of Earth Sciences, Shahid Chamran University of Ahvaz, Iran

3 National Iranian Oil Company, Exploration Directorate, Tehran, Iran


    Abadan plain is a structural zone located in the south-western end of the Zagros. To study the characteristics of the region's crude oils, reservoir oils of Bangestan group was examined by gas chromatography isotope ratio mass spectrometry (GC-IRMS) in some fields in this structural zone. The GC-IRMS results showed that all the studied crude oils have a marine origin with a small amount of terrigenous organic matter impute. Using compound specific isotope analysis (CSIA), it was found that all crude oils are belong to same family with same flat or less negative profile trend represent marine to transitional environment. According to Pristane and Phytane isotopic value, crude oil producing organic matter is almost same with a small amount of heterogeneous material. The reason of take some distance of Aa-Bu and Ba-sv from others samples is the different degree of maturity and or organic matter type. Therefore, use of isotopic methods especially CSIA in crude oil studies such as correlation and organic matter determination, is very efficient and accurate.


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