Geochemical Characteristics and Affecting Factors of the Unusually High Dibenzothiophenes Oils in the Tazhong Uplift
详细信息
- 责任者：Li Sumei (State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Zhang Baoshou
- 刊名：Geoscience
- 出版年：2011
- 卷期：25(6)
- 关键词：原油 ; crude oil ; 生物标志化合物 ; biomarkers ; 塔里木盆地 ; Tarim Basin
- 页码：p.1108-1120
- 图表：12 illus., 1 table, 45 refs.
- 分类号：1003
- issnNo：ISSN1000-8527
- isbnNo：CN11-2035/P
摘要
Unusually high dibenzothiophenes (DBTs) oils were detected in the Tazhong Uplift, Tarim Basin, with the maximum absolute abundance up to 26, 859 μg/g and relative abundance among the aromatic hydrocarbons recognizable up to 58.2%.The oil is usually situated in the Lower Ordovician in the No.1 Fault Belt and the TZ4 and TZ1-6 well-blocks. An integrated geochemical approach was utilized in characterizing the oils. The results show that the type of source rock has an significant controlling on the distribution and abundance of DBTs. Normal DBTs were detected in pure dark mudstones and shales, whereas super high DBTs were observed in the source rocks with high content of sulphate.