成岩阶段微生物作用及其油气地质意义

发布时间：2018-06-27 05:10

本文选题：微生物 + 生物降解　；参考：《天然气地球科学》2016年11期

【摘要】：成岩阶段微生物发育及其对有机质的改造对于生物甲烷聚集、优质烃源岩形成具有重要意义。在综合近年对沉积成岩过程相关的微生物作用研究的基础上,以柴达木盆地三湖坳陷第四系为例,论述了成岩阶段微生物在生物甲烷生成、有机质富集保存、可溶有机质生成等方面的作用。柴达木盆地三湖坳陷第四系生物标志化合物降解参数与产甲烷菌特征标志物的关系,指示原始沉积有机质降解与甲烷菌发育,是第四系沉积物中生物气聚集的关键因素;与细菌来源生物标志化合物相对丰度的关系,反映成岩阶段微生物发育改变了原始有机质性质;与氯仿沥青"A"转化率以及饱和烃相对丰度的关系,表明微生物发育是第四系沉积物中可溶有机质的重要来源。
[Abstract]:The microorganism development and its transformation to organic matter in diagenetic stage are of great significance for the accumulation of biomethane and the formation of high quality hydrocarbon source rocks. Based on the recent studies on the microbial processes related to sedimentary diagenesis, taking the Quaternary system of Sanhu Depression in Qaidam Basin as an example, the biogenic methane generation and organic matter enrichment in diagenetic stage are discussed. The role of soluble organic matter in the formation of organic matter. The relationship between the degradation parameters of Quaternary biomarkers and the characteristic markers of methanogenic bacteria in Sanhu Depression of Qaidam Basin indicates that the degradation of organic matter and the development of methanogens are the key factors of biogas accumulation in Quaternary sediments. The relationship with the relative abundance of bacterial biomarkers reflects that the development of microorganisms in diagenetic stage changes the properties of the original organic matter, the conversion rate of chloroform bitumen "A" and the relative abundance of saturated hydrocarbons. It is suggested that microbial development is an important source of soluble organic matter in Quaternary sediments.
【作者单位】：甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(编号:41172132) 国家重点基础研究发展规划项目(编号:2012CB214801) 甘肃省重点实验室专项(编号:1309RTSA041)联合资助
【分类号】：P618.13

【相似文献】