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生油岩和石油中芳烃馏份对我国地化工作者并不陌生,但系统地对芳烃组成的研究及其应用还不普遍,文献上的报导也仅仅是一些探索性研究。从理论上讲,芳烃化合物不仅是种类繁多,而且在分子量分布上有高度的重叠性。例如:分子量为178的菲和蒽,如果结构上有一个氢原子被甲基(-CH_3)取代,则产生8个导构体;分子量为218的(艹屈),其异构体有5个,若结构上一个氢原子也被甲基取代,则有29个异构体。随着芳烃分子量增加,其异构体将更加繁多。本文利用分子离子质量色谱对芳烃中可能含有的结构系列进行分析研究,同时对不同母质类型、不同成熟度的生油岩芳烃系列化合物组份分布及芳烃碳数分布等规律也进行了研究。
Aromatic oil fractions in petroleum and oil are not unfamiliar to geochemical workers in our country. However, the systematic study of aromatics composition and its application are not universal, and the literature reports are only some exploratory studies. In theory, aromatics are not only a wide variety but also have a high degree of overlap in molecular weight distribution. For example: phenanthrene and anthracene with a molecular weight of 178, if there is one hydrogen atom in the structure which is substituted by methyl (-CH_3), then 8 are produced; with a molecular weight of 218 If the structure of a hydrogen atom is also replaced by methyl, there are 29 isomers. As the aromatic hydrocarbon molecular weight increases, the isomers will be more numerous. In this paper, the molecular structure of aromatics may be analyzed by molecular ion mass spectrometry. At the same time, the distribution of aromatic compounds and the carbon distribution of aromatics in different parent materials and maturities have also been studied.