PETROLEUM GEOCHEMISTRY OF THE
JURASSIC/CRETACEOUS SOURCE ROCKS EXTRACTS
AND CRUDE OILS, RAS KANAYIS AREA, WESTERN
DESERT, EGYPT
ESAM A. ABD EL-GAWAD*
Geology Department, Faculty of Science, United Arab Emirates University,
P.O. Box 17551, Al-Ain, United Arab Emirates
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Extracts of eleven rock samples from Jb 26-1 and Ja 27-2 wells in Ras Kanayis area, in the northern part of the Western Desert of Egypt, were analyzed using gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) to provide information on the organic facies and the thermal maturity of the Kharita Formation (Albian), Alam El- Bueib #3 and #5 Members (Callovian/Barremian) and Khatatba Formation (Middle Jurassic). GC and GC/MS data of the rock extract samples were correlated with seven crude oil samples from from Khatatba Formation. All extracts based on the obtained results appear to have terrestrial input in different proportions except Khatatba extract at 4437 - 4440m in the Jb 26-1 well. Moreover, except for the Kharita extracts, all the studied extracts have reached thermal maturities sufficient to generate and expel mature crude oils. Correlation of source rock extracts with the studied oils revealed that the Jb 26-1 Khatatba and Alam El-Bueib source beds show a good correlation with the crude oil sample from the Ja 27-2 well. bution and S-Thge mineralizations in association with the Red Sea hat brines mineralized complete the general decrese in age of mineralization phases in nernern Africa.
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