摘要
本文讨论了孕甾烷和4-甲基甾烷的生源和成因问题。文中根据柴达木盆地第三系盐湖相油、岩的地球化学研究资料,证明了孕甾烷主要来自生油岩中有机质的热降解,与成烃作用同步,而4-甲基甾烷可能主要是成岩作用中微生物活动的产物。并提出了两种化合物的成因机理的模式。
The genetic source and origin of pregnanes and 4-methyl steranes are discu- ssed herein.According to a geochemical study of oils and source rocks in Terti- ary saline lake facies in Qaidam Basin,it is demonstrated in the present article that pregnanes are mainly derived from the thermal degradation of organic matter in source rocks synchronously with hydrocarbon genesis,while 4-methyl steranes may principally be a product of microbial activity during diagenesis, and thus,the machenisms of the origins of these two kinds of compounds are proposed.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1989年第3期8-15,共8页
Petroleum Exploration and Development
