Geochemical Characteristics of Crude Oil from Linzhen Area in the Ordos Basin, China
详细信息
- 责任者：Xu Li (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; CAS ; Lanzhou 730000 ; China) ; Duan Yi
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(2)
- 关键词：原油 ; crude oil ; 有机地球化学 ; organic geochemistry ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.406-413
- 图表：illus., 4 tables, 28 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Linzhen area is a new Mesozoic petroleum exploration target in the Ordos Basin,China.A series of oil reservoirs of upper Triassic Yanchang Formation and lower Jurassic Yanan Formation have been found in this area recently.In this paper,crude oil samples from Linzhen area were collected systematically and analyzed by means of high-resolution GC-MS technique.The compositional and distributional characteristics of biomarker compounds in oils from Yan-6,8,9 subsections of Yan′an Formation and Chang-3 subsection of Yanchang Formation were studied and the origin of crude oils is discussed in detail.The biomarker features show that the oils were formed under a weakly reducing freshwater environment and are mature.The results of oil-source rock correlation show that the geochemical characteristics of Yanchang Formation and Yan′an Formation crude oils from Linzhen area are similar to those of the upper Triassic Chang-7 subsection,indicating that the crude oils originated mainly from the Chang-7 source rock.
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