二连盆地呼仁布其凹陷原油和烃源岩菌藻类生物标志物组合特征及其地质意义
首发时间:2016-05-18
摘要:菌藻类微生物作为一类重要的成烃母质,具有极强的生烃能力。通过对二连盆地呼仁布其凹陷的低熟油及下白垩统3套未熟-低熟烃源样品的有机地化特征和显微组分构成研究发现,低熟油及源岩可溶有机质中"菌藻类生源"的生物标志物(如nC21-正构烷烃、三环萜烷、芳构化三萜类、长链烷基萘及甲基烷基萘系列)作为总烃馏分的主要生源构成对低熟烃类的形成贡献率可达22%,高于藻类生源及细菌生源的贡献率。另外,在低熟油母源岩显微组分构成中发现藻类体是其主要组分,且藻类体的总量与可溶有机质总烃馏分中"藻类生源"生标含量及"藻类+菌藻类"生标总量均呈明显正相关关系,这意味着常规所认为的成因复杂且难以界定的"菌藻类"生物标志物可划归为"藻类"生源意义,为藻类类脂物在未熟-低熟阶段成烃而成。
关键词: 地球化学 二连盆地 未熟-低熟油 菌藻类 生物标志物 藻类体
For information in English, please click here
Geological significance and features of Homonemeae biomarkers in oil and source rocks drilled in Hurenbuqi seg of Erlian basin
Abstract:With great hydrocarbon potential, Homonemeae microorganisms are considered as one of the important hydrocarbon generating materials. According to research on the organic geochemical feature and maceral composition characteristics of the immature oils and 3 set of source rocks of lower Cretaceous in immature-low mature stage, it is suggested that Homonemeae biomarkers like normal paraffin no more than C21 and Tricyclic terpanes ,Aromatized pentacyclic triterpenoid,Long chain alkyl as well as Methyl naphthalenes dominate the biomarkers composition of the total hydrocarbon fraction of immature oil and extractions of source rocks for about 22% far more than that of alga and bacterial microorganism., which shows great contributions to the generation of immature hydrocarbons. In addition, it is shown that alginates are the major macerals in the immature -low mature source rock , and the contents of alginate in the source rocks have good correlation with the concentration of alga biomarkers as well as the total content of alga and homonemeae biomarkers, which strongly suggest the homonemeae biomarkers are indeed with the alga origin, and are formed by Alga lipids in immature- low mature stage.
Keywords: Geochemistry Erlian Basin Immature oil Homonemeae microorganisms, Biomarke Alginate
基金:
论文图表:
引用
No.4689314114764414****
同行评议
共计0人参与
勘误表
二连盆地呼仁布其凹陷原油和烃源岩菌藻类生物标志物组合特征及其地质意义
评论
全部评论0/1000