激光拉曼光谱在有机显微组分研究中的应用

Application of laser Raman spectrum in organic maceral studies

鲍芳 李志明 张美珍 王汝成

Bao Fang Li Zhiming Zhang Meizheng Wang Rucheng

南京大学地球科学与工程学院, 南京, 210093 2. 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所, 江苏, 无锡, 214151

School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China 2. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China

煤岩显微组分分析一直以人工测试为主,受人为因素影响较大,而激光拉曼光谱能够反映碳物质结构的有序程度和结构缺陷,因此可从分子结构上研究认识有机显微组分的性质。该文对烃源岩中的3种显微组分(镜质体、半丝质体、丝质体)的拉曼光谱特征及其归属进行了研究,比较了各种显微组分拉曼光谱参数变化,并对不同组分的结构进行分析,寻找利用拉曼光谱快速有效的识别不同显微组分的方法。研究表明,在一定成熟度范围内,不同有机显微组分的D1峰位置与G峰半峰宽有较明显的变化,可作为判断不同有机显微组分的参考标准。利用拉曼光谱能够快速有效的识别煤及岩样中的显微组分,能作为显微组分分析的一种有效方法。

The former tests of coal maceral were usually carried out manually and were influenced obviously by manual elements.Laser Raman spectrum deals with the order and deficiency of carbon matter structure and analyzes the features of organic maceral from the aspect of molecular structure.In this paper,the features and classifications of laser Raman spectrum of three macerals(vitrinite,semifusinite and fusinite)in source rocks have been discussed.The comparisons of laser Raman spectrum parameters between different macerals have been made and the structures of different macerals have been analyzed.In this way,we intend to find a new way to distinguish different macerals quickly and precisely using laser Raman spectrum.It has been found out that,in certain maturity range,obvious difference exists between D1 peak and G peak half-width among different organic macerals.This might be used as a new standard to distinguish different organic macerals.Laser Raman spectrum identifies the macerals in coals and rock samples quickly and effectively.It is an effective method in maceral analyses.

https://doi.org/10.11781/sysydz201201104