| 鄂尔多斯盆地马岭油田延安组原油成因研究 |
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| 引用本文： | 段毅,张胜斌,郑朝阳,吴保祥.鄂尔多斯盆地马岭油田延安组原油成因研究[J].地质学报,2007,81(10):1407-1415. |
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| 作者姓名： | 段毅 张胜斌 郑朝阳 吴保祥 |
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| 作者单位： | 中国科学院兰州地质研究所,730000 |
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| 基金项目： | 国家重点基础研究发展计划“973”项目(编号2005CB422105)研究成果 |
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| 摘 要： | 马岭油田是鄂尔多斯盆地发现最早的油田之一,也是大陆河流相油气藏的典型代表,可是以往对马岭油田原油及其烃源岩地球化学研究很少,原油的成因更多的依靠于地质推测。本文对采集于马岭油田的21个原油和鄂尔多斯盆地14个烃源岩的烃类生物标志化合物进行了系统的分析,研究了它们的地球化学特征。生物标志化合物的分布和组成特征,指示了原油形成于弱还原环境淡水湖相;原油的母质除了菌藻类外陆源高等植物作出了重要贡献;原油均为成熟原油;油源对比表明,马岭油田原油的源岩为延长组烃源岩,特别是长7油层组烃源岩。
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| 关 键 词： | 鄂尔多斯盆地 原油和烃源岩 生物标志化合物 组成和分布特征 成因 |
| 修稿时间： | 2007-03-28 |
Study on Genesis of Crude Oil in the Yan'an Formation of the Maling Oilfield,Ordos Basin |
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| DUAN Yi,ZHANG Shengbin,ZHENG Zhaoyang,WU Baoxiang.Study on Genesis of Crude Oil in the Yan''an Formation of the Maling Oilfield,Ordos Basin[J].Acta Geologica Sinica,2007,81(10):1407-1415. |
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| Authors: | DUAN Yi ZHANG Shengbin ZHENG Zhaoyang WU Baoxiang |
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| Institution: | Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou, Gansu Province, 730000 |
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| Abstract: | Maling oilfield is one of the earliest-discovered oilfields in the Ordos basin.It is also typical representative of the pool reservoir land fluvial sandstones.However,previous study on geochemistry of crude oils and source rocks in the Maling oilfield is not enough and the genesis of crude oil depends mainly on geology suppositions.In this paper,21 crude oils from the Maling oilfield and 14 source rocks in the Ordos Basin have been systematically analyzed and geochemical characteristics of biomarkers in these samples have been studied.The distribution and composition of the biomarkers indicate that the crude oils were formed under weak reducing fresh water lacustrine environments.Besides algae,land higher plants have also made important contribution.The studied crude oils are fully developed.The comparison study shows that source the crude oils of the Maling oilfield are derived from Yanchang Formation source rocks,especially from Chang-7 subformation. |
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| Keywords: | Ordos basin crude oil and source rock biomarker characteristics of composition and distribution genesis |
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