基于激光拉曼光谱的海上风化原油鉴别研究

Identification of offshore weathered crude oil based on laser Raman spectroscopy

搭建了激光拉曼在线检测系统,对C6~C15正构烷烃、苯、萘、CCl4、饱和烃与苯混合溶液、CCl4萃取A,B原油的上清液进行了激光拉曼检测,并分别对拉曼光谱图中的出峰位置及特征峰强度进行了详细分析。试验结果表明:CCl4萃取风化后的B原油较A原油保留了较多的重烃组分,且A原油上清液在3082cm-1频移处产生了明显特征峰,该特征峰能较好地区分出2种原油类别,验证了激光拉曼光谱技术用于海上风化原油的快速鉴别的可行性,为海上风化原油的快速鉴别提供了一种可行的方法。

Laser Raman on-line detection system is set up to dectect C 6 -C 15 n -alkanes, benzene, naphthalene, CCl 4 , saturated hydrocarbon-benzene mixed solution, extraction of supernatant from crude oil A and B by CCl 4 . The position and intensity of peaks in Raman spectrogram are analyzed in detail. The experimental results show that the weathered crude oil B extracted by CCl 4 retains more heavy hydrocarbon components than crude oil A, and the supernatant of crude oil A has obvious characteristic peaks at 3 082 cm -1 frequency shift. This characteristic peak can distinguish two types of crude oil well, which verifies the feasibility of laser Raman spectroscopy for rapid identification of offshore weathered crude oil, and provides a feasible method for rapid identification of offshore weathered crude oil.