渤海相近石油平台原油指纹鉴别规律初探

选择我国渤海相邻两个石油平台,不同油井6种原油,依据重复性限及t检验方法进行油源比对,对渤海相近平台原油指纹鉴别规律进行了初探性研究.结果表明,同一原油开采平台或相近的石油平台,原油指纹信息总体相差不大,仅部分组分表现出显著差异,如n-C17/姥鲛烷、n-C18/植烷在渤海相近石油平台原油中差异最为显著,此外,伽玛蜡烷、升藿烷、莫烷、C29甾烷、C19—C22的正构烷烃、菲与烷基化菲类、二苯并噻吩及烷基化二苯并噻吩类也表现出明显差异.由此加强对原油中该类组分筛查,将有助于石油平台原油油源鉴别.

Fingerprint identification of different crude oils from adjacent oil platform in Bohai Sea

In this paper,six crude oils from adjacent oil platforms in Bohai Sea were studied for oil identification.The samples were analyzed according to the repeatability limit and t-test methods.The results indicate that overall there are no significant characteristic differences among these oil samples,but there are distinctive difference for a few components.The ratios of n-heptadecane to pristane and n-octadecane to phytane showed most notable differences between oil samples.Besides,the biomarkers such as gammacerane,moretane,homohopane,diasterane,normal alkanes from nonadecane to docosane,phenanthrene and alkyl phenanthrenes,dibenzothiophenes and alkyl dibenzothiophenes also showed significant differences.Strengthening the screening of these indices would help in the rapid and effective indentification of oil sources.