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天然气地球科学

• 天然气地球化学 • 上一篇    下一篇

鄂尔多斯盆地林镇地区原油地球化学特征

徐丽，段毅,邢蓝田,张晓丽，何金先，夏嘉，李伟，赵健   

  1. 1.中国科学院地质与地球物理研究所油气资源研究重点实验室，甘肃 兰州 730000； 2.中国科学院大学，北京 100049；3.中国石油青海油田公司勘探开发研究院，甘肃 敦煌 736202
  • 收稿日期:2012-06-07 修回日期:2012-07-04 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 徐丽xuli0055@126.com. E-mail:xuli0055@126.com.
  • 作者简介:徐丽（1986-），女，甘肃兰州人，博士研究生，主要从事地球化学研究. E-mail：xuli0055@126.com.
  • 基金资助:

    国家自然科学基金（编号：41272125；40872092）联合资助.

Geochemical Characteristics of Crude Oil from Linzhen Area in the Ordos Basin,China

XU Li，DUAN Yi,XING Lan-tian,ZHANG Xiao-li,HE Jin-xian，XIA Jia，LI Wei，ZHAO Jian   

  1. 1.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,CAS,Lanzhou 730000,China; 2.University of Chinese Academy of Sciences,Beijing 100049,China; 3.Research Institute of Petroleum Exploration and Development,Qinghai Oilfield Company，Dunhuang 736202,China
  • Received:2012-06-07 Revised:2012-07-04 Online:2013-04-10 Published:2013-04-10

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摘要： 林镇地区是鄂尔多斯盆地中生界油气勘探新区，近几年在该地区发现了延长组上部和延安组下部的复合油藏。通过对鄂尔多斯盆地林镇地区原油样品和区域内烃源岩样品进行系统采集和GC-MS分析，研究了原油和烃源岩中生物标志化合物的组成和分布特征，探讨了延安组延6、延8、延9和延长组长3等油层组原油的成因；油源对比研究表明该地区延安组与延长组原油的地球化学特征均与上三叠统延长组长7烃源岩具有亲缘关系，说明原油主要来源于长7烃源岩。这些研究成果为林镇地区石油勘探开发提供了科学依据。

关键词: 生物标志化合物, 原油, 烃源岩, 林镇地区, 鄂尔多斯盆地

Abstract:

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.

Key words: Biomarker, Crude oil, Source rock, Linzhen area, Ordos basin

中图分类号: 

  • TE122.1+14



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