塔里木盆地寒武系源岩地化特征及与典型海相原油对比

doi:10.11743/ogg20170503

Abstract

Abstract: 27 Cambrian source rock samples collected from the Tarim Basin were analyzed for geochemical characteristics and oil-source correlation studies.Most Cambrian source rock samples show a series features such as low pristane/phytane,C₂₁ tricyclic terpane/C₂₃ tricyclic terpane values,low homohopanes content,high content of gammacerane,high relative content of C₂₈ regular steranes and C₂₇ triaromatic steroids,high content of triaromatic dinosteroids and heavier stable carbon isotopic values.The oil-source rock analysis between typical Cambrian and Ordovician oils reveals that Cambrian source rocks have a high degree of similarity with Cambrian oils and are different from those Ordovician oils.So that the Cambrian source rocks are believed not to be the major source rocks of Ordovician reservoirs.Besides,source rocks from Xiaoerbulakr,Dongergou and Sugaitebulake profiles of the Kalpin Uplift show some differences with the rest of Cambrian source rocks on source constitution,which implies partially the same organism compositions with Ordovician oils.

Key words: triaromatic steroid, oil-source rock correlation, source rock, Cambrian, Tarim Basin

CLC Number:

TE122.1

Yang Fulin, Yun Lu, Wang Tieguan, Ding Yong, Li Meijun. Geochemical characteristics of the Cambrian source rocks in the Tarim Basin and oil-source correlation with typical marine crude oil[J]. Oil & Gas Geology, 2017, 38(5): 851-861.

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Geochemical characteristics of the Cambrian source rocks in the Tarim Basin and oil-source correlation with typical marine crude oil

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