原油不同极性含氮化合物的氮同位素组成特征
发布时间：2018-10-15 12:33
【摘要】：氮是原油的重要组成元素,主要赋存在非烃和沥青质中,依据其极性差异分为碱性与非碱性2种类型。相较于其他组成元素,原油氮同位素的研究非常有限,不同极性含氮组分的氮同位素特征研究更是缺乏。本次研究应用杜马斯燃烧法原理,利用EA-IRMS连用技术测定了江汉油田6个原油样品不同极性含氮化合物的δ~(15)N和δ~(13)C。结果表明,不同极性含氮化合物的氮同位素组成具有明显的差异,碱性氮的δ~(15)N为9.7‰~11.8‰,明显轻于非碱性氮(11.4‰~14.5‰),原因可能是2种含氮组分的形成机制不同,碱性氮形成于成岩作用早期,δ~(15)值主要受原始母质的影响,而非碱性氮在热演化过程中的富集,氮同位素值更重,利用氮同位素有益于进一步明确原油中含氮化合物的演化机制及其地球化学意义。
[Abstract]:Nitrogen is an important component of crude oil, which mainly exists in non-hydrocarbon and asphaltene. According to its polarity difference, it can be divided into two types: alkaline and non-alkaline. Compared with other elements, the study of nitrogen isotopes in crude oil is very limited, and the nitrogen isotopic characteristics of nitrogen components with different polarity are even less studied. In this study, the Dumas combustion principle was applied to the determination of 未 ~ (15) N and 未 ~ (13) C in 6 crude oil samples from Jianghan Oilfield by EA-IRMS technique. The results show that the nitrogen isotopic compositions of nitrogen compounds with different polarity are obviously different. The 未 ~ (15) N of basic nitrogen is 9.7 鈥，
本文编号：2272569
[Abstract]:Nitrogen is an important component of crude oil, which mainly exists in non-hydrocarbon and asphaltene. According to its polarity difference, it can be divided into two types: alkaline and non-alkaline. Compared with other elements, the study of nitrogen isotopes in crude oil is very limited, and the nitrogen isotopic characteristics of nitrogen components with different polarity are even less studied. In this study, the Dumas combustion principle was applied to the determination of 未 ~ (15) N and 未 ~ (13) C in 6 crude oil samples from Jianghan Oilfield by EA-IRMS technique. The results show that the nitrogen isotopic compositions of nitrogen compounds with different polarity are obviously different. The 未 ~ (15) N of basic nitrogen is 9.7 鈥，
本文编号：2272569
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