Geochemical Characteristics and Origin of Hydrocarbons from Lower Ordovician in Tazhong Area, Tarim Basin
详细信息
- 责任者：Li Sumei (State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Xiao Zhongyao
- 刊名：Xinjiang Petroleum Geology
- 出版年：2011
- 卷期：32(3)
- 关键词：油藏地球化学 ; reservoir geochemistry ; 塔里木盆地 ; Tarim Basin
- 页码：p.272-276
- 图表：5 illus., 1 table, 22 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
Multiple approaches are applied to analyze of the characteristics and origin of the oils from the Lower Ordovician in Tazhong area, Tarim Basin. The results show that most of the Lower Ordovician oils are mixed-source oils from both the Cambrian-Lower Ordovician and the Middle-Upper Ordovician with a little higher contribution of the former. It is detected that hydrocarbons from the Lower Ordovician should have suffered some alterations such as thermochemical sulphate reduction (TSR) after accumulation to a certain degree. These might have played an essential role in hydrocarbons alteration and reservoir preservation in this area.
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