甘肃窑街中侏罗统植物化石角质层与烃源岩生物标志化合物特征

发布时间：2018-02-27 21:23

本文关键词： 烃源岩植物化石角质层中侏罗世生物标志化合物窑街盆地　出处：《兰州大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：通过分析采集自甘肃窑街中侏罗统的炭质泥岩、油页岩、泥岩中的饱和烃馏分和芳烃馏分以及裸子植物化石角质层中的相同组分,在样品中检测出表征高等植物输入的生物标志化合物,表明裸子植物角质层为烃源岩生物标志化合物的母源之一.结合藿烷母质类型等参数的分析,表明烃源岩样品以高等植物输入为主,且水生藻类有一定贡献.植物化石角质层样和烃源岩样中表征细菌微生物作用、指示沉积环境以及判断样品成熟度的参数均吻合,说明窑街盆地中侏罗统的沉积相属于弱氧化-弱还原的半深湖相或滨浅湖相,沉积介质为淡水-微咸水,有机质经历过一定程度的微生物降解作用,处于未熟-低熟阶段.研究结果对深入分析窑街盆地中侏罗统烃源岩沉积环境具有指导意义.
[Abstract]:The saturated hydrocarbon fractions and aromatics fractions from middle Jurassic carbonaceous mudstone, oil shale and mudstone in Yaojie, Gansu Province, and the same components in the fossil kernels of gymnosperms were analyzed. Biomarkers representing the import of higher plants were detected in the samples, indicating that the keratinocytes of gymnosperms are one of the parent sources of biomarkers of hydrocarbon source rocks. The results show that the source rock samples are mainly imported from higher plants, and the aquatic algae contribute to some extent. The plant fossils cuticle samples and hydrocarbon source rock samples represent the action of bacteria and microbes, indicating the sedimentary environment and the parameters of judging the maturity of the samples are consistent. The results show that the sedimentary facies of the Middle Jurassic in Yaojie Basin belong to the semi-deep lacustrine facies with weak redox or shallow lacustrine facies, the sedimentary medium is fresh water and brackish water, and the organic matter has experienced a certain degree of microbial degradation. The results of the study are helpful for the further analysis of the sedimentary environment of the Middle Jurassic source rocks in the Yaojie Basin.
【作者单位】：兰州大学地质科学与矿产资源学院;中国科学院地质与地球物理研究所兰州油气资源研究中心;
【基金】：甘肃省油气资源研究重点实验室开放课题基金(FZDKFJJ20150603) 高等学校博士学科点专项科研基金项目(20120211110022)
【分类号】：P618.13;Q914

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