新疆石油地质 ›› 1998, Vol. 19 ›› Issue (5): 372-376.

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干酪根在不同生油岩中的生烃动力学特征

高岗, 郝石生   

  1. 石油大学 北京 100083
  • 收稿日期:1997-10-23 出版日期:1998-10-01 发布日期:2020-09-19
  • 作者简介:高岗:讲师 煤田、油气田地质与勘探
  • 基金资助:
    本文为中国石油天然气总公司大、中型油气田成藏定量模式研究资助项目

HYDROCARBON-GENERATION DYNAMICS CHARACTERISTICS OF KEROGEN IN DIFFERENT SOURCE ROCKS

Gao Gang, Hao Shisheng   

  1. University of Petroleum, Beijing 100083
  • Received:1997-10-23 Online:1998-10-01 Published:2020-09-19
  • About author:Gao Gang, Lecturer, Petroleum Geology

摘要: 通过Ⅰ型干酪根和Ⅱ2-Ⅲ1型干酪根在泥质岩和碳酸盐岩中的热解生烃动力学特征的分析, 认为在岩性相同时对生烃动力学起决定作用的是有机质类型, 但在有机质类型相同时, 不同生油岩岩性对其生烃动力学有一定的影响(尤其是主要生烃早期和生烃后期);岩性不同时, 相同有机质的活化能分布较为相似;Ⅰ 型干酪根的活化能分布范围很窄, 泥质岩与碳酸盐岩中主要分布于50 837~ 53 828 cal/mol;Ⅱ2-Ⅲ1 型干酪根活化能分布比Ⅰ 型干酪根范围宽, 但又表现为泥质岩活化能分布宽于碳酸盐岩。最后根据碳酸盐岩的热解动力学特征确定了含Ⅰ 型和Ⅱ2-Ⅲ1 型干酪根的碳酸盐岩生油岩剖面的生烃定量模型。

关键词: 干酪根类型, 生油层, 热动力学, 特征, 生油模型

Abstract: The analysis of pyrolytic hydrocarbon-generation dynamics characteristics of Ⅰ or Ⅱ2-Ⅲ1 type of kerogen is made in mudstone and carbonate rock.It shows that the decisive effect on hydrocarbon-generation dynamics with the same lithology is what types of organic matters are, when the type of organic matter is same, lithologies of different source rocks may affect hydrocarbon-generation dynamics characteristics in some degree, especially in the early and late hydrocarbon-generation periods.With different lithologies, the activation energy distribution of same organic matter is relatively similar.The activation energy distribution of Ⅰ type of kerogen ranges narrowly, being 50 837~ 53 828 cal/mol for mudstone and carbonate rock;that of Ⅱ2-Ⅲ1 type of kerogen is wider than that of Ⅰ type of kerogen, and that of mudstone is wider than that of carbonate rock.Finally, according to pyrolysis dynamics characteristics of carbonate rock, a quantitative hydrocarbon-generation calculating model of carbonate source rock section with Ⅰ or Ⅱ2-Ⅲ1 type of kerogen is developed in this paper.

Key words: Kerogen type, Source bed, Thermodynamics, Characteristics, Oil generation model