摘要
对塔里木盆地库车坳陷三叠系和侏罗系的 11个岩心与露头煤样的地球化学分析表明 ,煤的生物标志物组成随演化程度的增加而有规律的变化 :成熟早期 (镜质组反射率Ro <1 0 % )煤的生物标志物组成反映了沉积环境和生源的特征 ;成熟晚期 (1 10 % <Ro <1 30 % )煤的生物标志物特征受成熟度的控制作用十分明显 ,生物标志物参数随Ro 的增大而增加或减小 ;高过成熟阶段 (Ro >1 30 % )所有煤样的生物标志物组成已基本趋于一致 ,而且和湖相泥岩的生物标志物特征相似 。
Eleven Jurassic and Triassic cores and coal samples of outcrops in Kuche Depression of Tarim Basin are analyzed geochemically. The results shows that the biomarker composition of coal are changed regularly with the the increase of evolutional level. When vitrinite reflectance is less than 1. 0% at early mature stage, the biomarker composition of coal reflects the properties of sedimentary environment and original source. When the vitrinite reflectance is 1.1% <R 0<1.3% , at late mature stage the characteristics of biomarker composition of coal are obviously controlled by the maturity ,the biomarker parameters are reduced with the increase of R 0. When the vitrinite reflectance is over 1.3%, all of the coal samples tends to have the same biomarker composition, like those of lacustrine mudstone. The biomarker composition can not be used in oil-source correlation at this stage.
出处
《江汉石油学院学报》
CSCD
北大核心
2002年第2期27-29,共3页
Journal of Jianghan Petroleum Institute
基金
国家"九五"重点科技攻关项目 ( 991110 10 30 2 )
