新疆石油地质

›› 2015, Vol. 36 ›› Issue (1): 1-1.doi: 10.7657/XJPG20150122

• 论文 •    

应用13C核磁共振波谱分析吐哈盆地干酪根结构变化

屈振亚1，2，郭隽虹1，2，孙佳楠1，2，王晓锋3，邹艳荣1   

  1. (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,广州 510640;2.中国科学院大学,北京 100049;3.中国科学院 地质地球物理所 兰州油气中心,兰州 620100)
  • 出版日期:2019-01-01 发布日期:1905-07-11

Application of 13C NMR Spectroscopy to Analysis of Kerogen Pyrolytic Structure in Badaowan Coal of Jurassic in Tuha Basin

QU Zhenya1,2, GUO Juanhong1,2, SUN Jianan1,2, WANG Xiaofeng3, ZOU Yanrong1   

  1. (1.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (CAS), Guangzhou, Guangdong 510640, China; 2.University of CAS, Beijing 100049, China; 3.Lanzhou Center of Oil and Gas Resources, Institute of Geology and Geophysics, CAS, Lanzhou, Gansu 620100, China)
  • Online:2019-01-01 Published:1905-07-11

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摘要： 吐哈盆地是中国较大的煤系含油气盆地之一，成烃母质大多处于低成熟阶段。为研究油气形成过程中干酪根大分子结构的变化，对盆地侏罗系八道湾组的煤与碳质泥岩干酪根，进行了热解实验，借助于13C核磁共振波谱分析，研究了不同成熟度下干酪根结构的特征与变化。结果表明，随热演化程度的增加，煤与碳质泥岩干酪根中的脂肪族类明显降低、氧接芳碳脱落、芳香结构轻微缩合，在低成熟演化阶段表现尤为明显。脂肪链中亚甲基次甲基含量大于甲基含量，是吐哈盆地轻质低成熟油储量多于低成熟气的主要原因。

Abstract: Turpan-Hami (Tuha) basin is one of large coal-measure petroliferous basins in China, in which the kerogen of most source rocks is in low-matured stage. By means of 13C NMR spectroscopy analysis and pyrolytic experiment, this paper studied the characteristics and variation of the kerogen structures in different heating rates and maturities from the Badaowan coal and carbonaceous mudstone of the Jurassic in Tuha basin. The results show that such a kerogen is in fact that the aliphatic structure carbons are significantly reduced, the oxygen-aromatic carbons are cracked out and the aromatic structures are slightly condensed, especially in the low-matured evolution stage. The amount of methylene groups is more than that of methyl groups, which could be the main reason for the basin’s light and low-matured crude oil reserves are more than low-matured natural gas

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