论文部分内容阅读
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,最后基于油气地球化学手段对多环芳烃风化溢油鉴别的可行性、原理、常用指标等进行探讨.结果表明,不同油样中同一芳烃生物标志化合物比值参数量值间有显著性差异;对同一油样的风化和未风化样品而言,同一烷基化多环芳烃特征比值参数的变异系数为6.51%—17.68%,而成熟度指标的变异系数通常小于8%;芳烃中烷基萘和“三芴”的分布特征、甲基萘指数、甲基菲指数和烷基化多环芳烃同系物的双比率可以作为重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, depositional environment and maturity. The GC-MS analysis of the experimental products was carried out. Finally, the feasibility and principle of identification of PAHR oil spill based on the geochemical methods of oil and gas were summarized Index, etc. The results show that there are significant differences in the ratio of the same aromatic compound biomarkers in different oil samples; for the same sample of weathered and unweathered samples, the same alkylated PAHs characteristic ratio parameter Coefficient of variation was 6.51% -17.68%, while the coefficient of variation of the maturity index was usually less than 8%. The distribution characteristics of alkylnaphthalene and “fluorene” in aromatic hydrocarbons, methylnaphthalene index, methylphenanthrene index and alkyl The double ratio of polycyclic aromatic hydrocarbons (PAHs) homologues can be used as an effective indicator for the identification of heavily weathered oil spills.