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５０８３７～５３８２８ｃａｌ／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。
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 dy namics 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.
出处
《新疆石油地质》
CAS
CSCD
1998年第5期372-376,共5页
Xinjiang Petroleum Geology
关键词
干酪根
生油岩
生烃
动力学
油气成因
Kerogen type Source bed Thermodynamics Characteristics Oil generation model
