| 塔里木盆地寒武系原油微量元素特征及意义 |
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| 引用本文： | 秦欢,杨涛,潘文庆,陈永权,张宝收. 塔里木盆地寒武系原油微量元素特征及意义[J]. 高校地质学报, 2018, 24(6): 822 |
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| 作者姓名： | 秦欢 杨涛 潘文庆 陈永权 张宝收 |
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| 摘 要： | 塔里木盆地是中国最大的内陆含油气盆地，有关盆地内主力烃源岩层位时代目前仍存在一定争议。油-油对比能够发现原油间的亲缘关系，明确不同类型原油地球化学特征，是解决这一问题的有效手段。中深1井及中深1C井发现的中寒武统阿瓦塔格组、下寒武统肖尔布拉克组原油可以作为重要的端元油类型参与油-油对比。本文通过对比两种寒武系原油及盆地内多种轻质原油微量元素组成，发现根据多种过渡金属元素比值进行聚类分析可将盆地内轻质原油分为I类和II类，Cr/V，Ni/Mn，Ni/Mo比值是原油分类的良好指标。I类原油较II类原油具有较低的Cr/V比及较高的Ni/Mn与Ni/Mo比，表明其烃源岩沉积环境相对还原。本次分类结果与前人有机地球化学研究相符，表明无机地球化学指标可作为原油分类的重要参考，具有较大的应用潜力。
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| 关 键 词： | 塔里木盆地 寒武系原油 微量元素 油-油对比 |
Characteristics and Significances of Trace Elements of Cambrian Crude oil in Tarim Basin |
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| QIN Huan,YANG Tao,PAN Wenqing,CHEN Yongquan,ZHANG Baoshou. Characteristics and Significances of Trace Elements of Cambrian Crude oil in Tarim Basin[J]. Geological Journal of China Universities, 2018, 24(6): 822 |
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| Authors: | QIN Huan YANG Tao PAN Wenqing CHEN Yongquan ZHANG Baoshou |
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| Abstract: | Tarim Basin is the largest inland oil and gas basin in China. The main source rocks of oil in the basin are still controversial.Oil-oil correlation can discern the relationship between crude oils and identify the geochemical characteristics of different types ofcrude oil, which is an effective method to address this problem. The crude oil from the Awatage Formation of the Middle Cambrian andthe Xiaoerbulake Formation of the Lower Cambrian in Zhongshen-1 Well and Zhongshen-1C Well serve as important end-member oilsfor oil-oil comparison. In this study, trace elements characteristics of the two kinds of Cambrian crude oil and a variety of light crude oilwere investigated, and results indicate the studied oil can be classified into two groups in terms of trace elements ratios including Cr/V,Ni/Mn and Ni/Mo. The crude oil in group I have lower Cr/V ratios and higher Ni/Mn, Ni/Mo ratios than the crude oil in group II, whichmay indicate that the source rocks for group I were deposited in a relatively more reducing environment. The classification results areconsistent with previous studies based on organic geochemistry, indicating that inorganic geochemical indicators can also be used asindexes for crude oil classification, and have great potential for further application. |
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| Keywords: | Tarim Basin Cambrian crude oil trace elements oil-oil correlation |
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