The fluid inclusion characteristics and hydrocarbon accumulation process in Lungu area were clarified. Based on the petrological observation of core samples in Lungu area,the analysis and testing of fluid inclusion system and the fluorescence measurement of crude oil,combined with the homogeneous temperature and burial history projection method,the hydrocarbon generation history of source rocks was simulated to restore the hydrocarbon accumulation process. The results show that there are three stages of oil inclusions in the Ordovician in Lunku area,which are yellow brown,yellow green and blue fluorescence,respectively. The homogenization temperature of the associated saline inclusions ranges from 70 ℃ to 100 ℃,80 ℃ to 110 ℃,and 100 ℃ to 120 ℃,respectively. The three stages of oil inclusions in the whole area correspond to three charging periods,which are Late Caledonian-Early Hercynian,Late Hercynian and Xishan. The western region of Lungu is dominated by Late Caledonian and Early Hercynian oil,the central region of Lungu is dominated by Late Hercynian oil,and the eastern region of Lungu is dominated by Himalayan oil.
Tarim BasinLungu areadeep oil and gas reservoirfluid inclusionmain accumulation periodpetroleum geology
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