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鄂尔多斯盆地西峰油田原油地球化学特征及其成因
引用本文:段毅,吴保祥,张辉,郑朝阳,王传远.鄂尔多斯盆地西峰油田原油地球化学特征及其成因[J].地质学报,2006,80(2):301-310.
作者姓名:段毅  吴保祥  张辉  郑朝阳  王传远
作者单位:1. 中国科学院兰州地质研究所,730000
2. 中国科学院广州地球化学研究所,510640
基金项目:中国科学院国际合作项目;中国科学院知识创新工程项目;科技部科研项目
摘    要:通过对鄂尔多斯盆地西峰油田原油进行系统地采样和高分辨率的GC-MS、IRMS分析,研究了原油的生物标志化合物和碳同位素组成特征,并且进行了油源对比,探讨了其成因。研究资料指示了所研究原油属于同一成因类型;原油有机母质为菌藻类和高等植物,特别是高等植物为原油的形成作出了贡献;原油形成于弱还原和淡水或微咸水环境;原油均为成熟原油;原油地球化学特征和上三叠统延长组长,油层组具有亲缘关系,反映了原油主要来源于长,油层组。这些研究结果为盆地的石油勘探提供了科学依据。

关 键 词:鄂尔多斯盆地  原油  生物标志化合物  组成和分布特征  碳同位素  成因
修稿时间:5/8/2004 12:00:00 AM

Geochemistry and Genesis of Crude Oils of the Xifeng Oilfield in the Ordos Basin
DUAN Yi ,WU Baoxiang ,ZHANG Hui ,ZHENG Chaoyang ,WANG Chuanyuan Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou,Gansu, Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,Guangdong.Geochemistry and Genesis of Crude Oils of the Xifeng Oilfield in the Ordos Basin[J].Acta Geologica Sinica,2006,80(2):301-310.
Authors:DUAN Yi  WU Baoxiang  ZHANG Hui  ZHENG Chaoyang  WANG Chuanyuan Lanzhou Institute of Geology  Chinese Academy of Sciences  Lanzhou  Gansu  Guangzhou Institute of Geochemistry  Chinese Academy of Sciences  Guangzhou  Guangdong
Abstract:Crude oil samples of the Xifeng oilfield in the Ordos basin were collected systematically and analyzed by means of high-resolution GC-MS and IRMS. In this paper, biomarkers and carbon isotopic compositions in crude oils were studied, and the oil/source correlation and their genesis were discussed. The data indicate that the studied oils are of the same genetic type. The oil-forming matrixes are algae and higher plants, especially with an important contribution of higher plants to the formation. The crude oils were formed under weak reducing and fresh water environments. The crude oils are mature. The geochemical characteristics of crude oils are closely correlated to those of the Upper Triassic Chang-7 subsection, reflecting that crude oils were mainly originated from the Chang-7 oil bed group.
Keywords:Ordos basin  crude oil  biomarker  composition and distribution  carbon isotope  genesis
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