Study on Aromatic Hydrocarbons of Crude Oils from Qun 5 Well in Tarim Basin

Based on the analytical data of aromatics of the crude from dun 5 Well in Tarim basin,the oils of this well were thought to be in an excellent homogeneity,and there was the same source for oils from different parts of the reservoir. The Qun 5 Well oils are highly mature and are thought to be generated from the Cambrian一Ordovician carbonates which were formed in marine environment with a strongly reducing condition, A long一distance migration had oc- curred to the oils which were accumulated in Bachu formation of the lower Carboniferous.