| 干酪根分子结构在低熟阶段的演化特征：基于红外光谱分析 |
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| 引用本文： | 郭隽虹,;邹艳荣,;颜永何,;屈振亚,;王晓锋,;蔡玉兰,;彭平安.干酪根分子结构在低熟阶段的演化特征：基于红外光谱分析[J].地球化学,2014(5):529-537. |
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| 作者姓名： | 郭隽虹 ;邹艳荣 ;颜永何 ;屈振亚 ;王晓锋 ;蔡玉兰 ;彭平安 |
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| 作者单位： | [1]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东广州510640; [2]中国科学院大学,北京100049; [3]中国科学院地质与地球物理研究所兰州油气中心,甘肃兰州620100 |
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| 基金项目： | 国家自然科学基金（41173054）本研究工作得到了国家自然科学基金（41173054）的资助;成文过程得到了中国科学院地质与地球物理研究所兰州油气中心徐永昌教授的指导,在此一并致以诚挚的谢意. |
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| 摘 要： | 为研究低熟气形成过程中大分子结构的变化情况，对吐哈盆地侏罗系八道湾组的煤与碳质泥岩干酪根在不同升温速率下进行了热解实验，借助于红外光谱分析，研究了不同热模拟温度下干酪根结构的特征与变化。结果表明，随热演化的进行，煤与碳质泥岩干酪根的芳香结构不断缩合，含氧官能团不断脱落，碳质泥岩干酪根中的脂肪族类有所降低。吐哈盆地低熟气主要来源于煤与碳质泥岩干酪根中的含氧官能团--羧基与甲氧基，以及碳质泥岩干酪根上的脂肪族。从干酪根结构上揭示了低熟气主要来源于Ⅲ型有机质的原因。
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| 关 键 词： | 低熟气 热解实验 大分子结构 含氧官能团 吐哈盆地 |
Evolutional characteristics of the kerogen molecular structure during the low-mature stage：An infrared spectra analysis |
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| Institution: | GUO Juan-hong, ZOU Yan-rong, YAN Yong-he, QU Zhen-ya, WANG Xiao-feng, CAI Yu-lan, PENG Ping-an( 1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Lanzhou Center for Oil and Gas Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 620100, China) |
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| Abstract: | To study the kerogen macromolecular structure changes during the formation of low-mature gas, the pyrolysis experiments of the kerogens from the Jurassic coal and carbonaceous mudstone of the Badaowan Formation in the Turpan-Hami Basin at different heating rates and the Fourier Transform Infrared Spectroscopy （FTIR） analysis of the simulated residuals at different heating temperatures were carried out. The results show that as temperature increases, the aromatic structures gradually experience a condensation process while the oxygenic functional groups on the aromatics are gradually cracked out, and the small molecule aliphatic hydrocarbons of the carbonaceous mudstone kerogen are a little reduced. The low-mature gas in the Turpan-Hami Basin is mainly derived from the oxygenic functional groups on the aromatics-carboxylic and methoxy, and from the short aliphatic chains of the carbonaceous mudstone kerogen. The reason why the low-mature gas is mainly generated from typeⅢkerogen is revealed from the perspective of kerogen structure in this paper. |
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| Keywords: | low-mature gas pyrolysis macromolecular structure oxygenic functional groups Turpan-Hami Basin |
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