溢油长期风化的碳稳定同位素指纹变化规律

发布时间：2018-12-08 14:13

【摘要】：根据石油中的碳稳定同位素具有母质继承效应,利用稳定同位素手段对原油的油指纹进行鉴定。对于正构烷烃指标,在室内对380#燃料油进行了长期风化模拟实验,在长期风化中δ13CPr/C19、δ13CPh/C19、δ13CPr/C20和δ13CPh/C20其相对标准偏差(RSD,relative standard deviation)小于5%,表现出一定的稳定性,可作为诊断比值来进行油指纹鉴别。对于多环芳烃,对380#燃料油和科威特原油进行了室内长期风化模拟实验,燃料油和原油风化样的δ13Cflu和δ13Cph分别分布于-27.476‰~-26.583‰和-26.482‰~-21.914‰,各自集中于一定范围内,利用δ13Cflu和δ13Cphe双指标可区分不同油品的风化样品。研究证明稳定同位素作为一种追踪油源的技术手段,可以用于风化后的油源鉴别。
[Abstract]:According to the parent material inheritance effect of carbon stable isotopes in petroleum, the oil fingerprints of crude oil were identified by means of stable isotopes. For n-alkanes, a long-term weathering simulation experiment was carried out on 380# fuel oil in laboratory. The relative standard deviations (RSD,relative standard deviation) < 5) of 未 13 CPR / C 19, 未 13 C Phr / C 19, 未 13CPr/C20 and 未 13CPh/C20 were obtained during the long weathering. It shows certain stability and can be used as diagnostic ratio for oil fingerprint identification. For polycyclic aromatic hydrocarbons (PAHs), long term weathering experiments were carried out on 380# fuel oil and Kuwait crude oil. The 未 13Cflu and 未 13Cph of fuel oil and crude oil weathered samples were distributed in the range of -27.476 鈥，

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