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对母质来源、沉积环境和成熟度各异的原油样品进行风化模拟实验,并对实验产物进行GC-MS分析,最后对甾烷、萜烷和多环芳烃进行风化溢油鉴定的可行性、原理、常用指标等进行探讨。结果表明,不同油中同一甾烷、萜烷和芳烃生物标志化合物比值参数量值间有显著性差异;对相同油的风化和未风化样品而言,同一萜烷和甾烷比值参数的变异系数通常小于15%;同一烷基化多环芳烃的特征比值参数变异系数为6.51%~17.68%,而成熟度指标变异系数通常小于8%。甾萜烷和多环芳烃可以作为风化溢油鉴别的有效指标。
The weathering simulation experiments were carried out on crude oil samples with different parent material sources, sedimentary environment and maturity, and the GC-MS analysis of the experimental products was carried out. Finally, the feasibility and principle of the identification of steranes, terpanes and polycyclic aromatic hydrocarbons , Commonly used indicators to explore. The results showed that there were significant differences in the ratio of the biomarkers of the same steranes, terpanes and aromatics in different oils. For the weathered and unweathered samples of the same oil, the coefficient of variation of the ratio of the same terpane and sterane Usually less than 15%. The coefficient of variation for the same alkylated PAHs is 6.51% ~ 17.68%, while the coefficient of variation of maturity index is usually less than 8%. The terpenoids and polycyclic aromatic hydrocarbons (PAHs) can be used as effective indicators for the identification of weathered oil spills.