石油与天然气地质 ›› 1980, Vol. 1 ›› Issue (1): 47-55.doi: 10.11743/ogg19800106

• 论文 • 上一篇    下一篇

陕甘宁盆地古生界油气形成中干酪根的演化

范璞1, 沈平1, 荣光华1, 王宏勇1, 叶继荪2   

  1. 1. 中国科学院兰州地质研究所;
    2. 中国科学院贵阳地球化学研究所
  • 出版日期:1980-06-25 发布日期:2012-01-16

EVOLUTION OF KEROGEN IN THE OIL-GAS FORMATION IN THE PALAEOZOIC SEDIMENTS OF SHAANXI-GANSU-NINGXIA BASIN

Fan Pu1, Shen Ping1, Rong Guanghua1, Wang Hongyong1, Ye Jisun2   

  1. 1. Lanzhou Institute of Geology, Academia Sinica;
    2. Guiyang Institute of Geochemistry, Academia Sinica
  • Online:1980-06-25 Published:2012-01-16

PDF (PC)

705

被引次数

6

摘要：

干酪根系原始有机质(脂肪酸、蛋白质、色素、纤维素、木质素),在成岩作用过程中聚合而成的不溶的复杂的固态高分子化合物。其结构为环状缩聚核,带有烷基支链和官能团,为杂原子链特别是氧所连接[1][2]。随着生油岩埋藏的加深、温度升高、时间增长,干酪根热裂解逐渐形成油气。因此,对于干酪根研究的重要性日益引起人们的重视。

Abstract:

The characteristics of pyrolysis(P-FID),thermogravimetric analysis (TGA),infrared spectrums(IR),elements composition and carbon isotope ratios of kerogen in the Palaeozoic rocks of the Shaanxi-Gansu-Ningxia Basin have been investigated,and the types of kerogen in vari-ous sequences have been described in this paper.The main types of ke-rogen favourable to oil-gas formation in this basin are sapropel(O2)and mixed humus and sapropel(C2b,C3t),because of their high con-tents of C degradation hydrocarbons,It is suggested that,with the grade of metamorphism getting higher,the H/C(atomic ratio) and O/C(atomic ratio)of kerogen tend to de-crease,the H/C(atomic ratio)of asphaltene and the fractionation ofδC13 to increase.