煤源岩单组分化学结构及生烃性定量分析

QUANTITATIVE ANALYSIS ON THE CHEMICAL STRUCTURES AND HYDROCARBON-GENERATING CHARACTERISTICS OF MONOMACERALS IN COAL SOURCE ROCKS

李荣西

Li Rongxi

中国科学院地球化学研究所矿床地球化学开放研究室, 贵州, 贵阳 550002 2. 长安大学地球科学系, 陕西, 西安 710054

Research Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China 2. Department of Earth Science, Chang'an University, Xi'an, Shaanxi 710054, China

文中应用显微傅立叶红外光谱对一煤源岩样中的荧光镜质体、角质体和树脂体进行了分析测试,并采用红外光谱分谱技术、应用计算机曲线拟合方法对其化学结构和生烃性进行了定量分析研究.结果表明:(1)镜质体含有较高的C=O结构,而角质体和树脂体含有较高的脂肪烃(CH2+CH3)结构;(2)煤岩单组分化学结构特征决定了它们具有不同的生烃特征,其中镜质体以生气为主,角质体和树脂体以生油为主,镜质体和树脂体具有早期生烃形成低熟油的特点.

In this paper,Micro-FTIR is used to analysed and test fluorescence vitrinite,cutinite and resinite in a coal source rock sample,and their chemical structures and hydrocarbon-generating characteristics are quantitative analysed and studied by means of the IR partition chromatographic technology and the computer curve-fitting method.The results show that vitrinite has more C=O structure,and cutinite and resinite two have more aliphatic hydrocarbon structure (CH2+CH3);the chemical structures of monomacerals in coal rocks decide that they have different hydrocarbon-generating characteristics,that is,vitrinite mainly generates gas,cutinite and resinite mainly generates oil,and vitrinite and resinite have the feature to generate hydrocarbons and form low-mature oil in the earty stage.

中国博士后科学基金(1999/10);国家自然科学基金(49672131)

https://doi.org/10.11781/sysydz200101084