Geochemical Characteristics and Oil-Source Correlation of Crude Oils in the Zhenjing Area, Southern Ordos Basin
详细信息
- 责任者：Deng Nantao (State Key Laboratory of Petroleum Resources and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Zhang Zhihuan
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(3)
- 关键词：原油 ; crude oil ; 油—源对比 ; oil-source rock correlation ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.604-611
- 图表：7 illus., 1 table, 19 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Samples of the Mesozoic source rocks,crude oils and oil sands from Zhenjing area in the southern Ordos Basin were collected systematically.Gas chromatography-mass spectrometry(GC-MS)was performed on the saturated hydrocarbon fractions extracted from these samples in order to discuss their biomarker characteristics and the origin of Mesozoic crude oils.The results show that,on the basis of biomarker source parameter distribution,the Mesozoic source rocks in Zhenjing area can be divided into four types(A1,A2,A3and B),and crude oils can be grouped into two types(ⅠandⅡ).Type I crude oils should be derived from Chang 7oil shales that deposited in reducing,deep lacustrine environment.TypeⅡcrude oils should be sourced from Chang 7dark mudstones laid down in a sub-reducing to reducing,deep or semi-deep lacustrine environment.Apparently,oil shales in Chang 7,as the main source rocks in the southern Ordos Basin,contributed predominately to the crude oils in this area.
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