生物气源岩评价指标研究现状及展望  

Present Researches and Prospects of the Evaluation Indicator of Biogenic Gas Source Rocks

作　　者：穆亚蓬[1,2] 王万春[1] 宋振响[1,2] 

机构地区：[1]中国科学院地质与地球物理研究所气体地球化学重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《天然气地球科学》2008年第6期775-779,共5页Natural Gas Geoscience

基　　金：中国科学院院长奖获得者专项基金项目;国家重点基础研究发展规划项目(编号:2002CB211701)联合资助

摘　　要：生物气成因的特殊性,使得对生物气源岩的评价也有异于常规烃源岩。有利于生物气生成的物质与环境条件包括源岩快速大量沉积、烃源岩处于低温低演化阶段、原始生源中富含甲烷生物潜量高的草本植物、封闭的缺氧环境等。促使有机质转化为生物气的动力则包括产甲烷菌等微生物菌群的联合作用。反映微生物活动及其强度的指标,如地层中的微生物计数、厌氧菌发酵产气模拟试验以及与微生物作用有关的生物标志化合物的存在及其丰度等,是生物气源岩评价的有效地球化学参数,也是未来需要加强研究的领域。Because of the special origin of biogenic gas, the evaluation of its source rocks is different from conventional hydrocarbon source rocks. The material and environmental conditions that are favorable to the generation of biogenie gas include the large amounts of quickly deposited source rocks, the low temperature evaluation stage of source rocks, the enrichment of herbs with high biological potential of methane in the originat biogenesis and the closed anoxia environment, etc. The power which makes organic matter transform into biogenic gas is the combined action of methanogenic bacteria and correlated microbial flora. The indicators reflecting microbial activity and intensity, such as the counts of micro-organisms, the gas producing experiment with simulated anaerobic fermentation, the existence and abundance of biomarkers related to the microbial activity, are favorable geochemical parameters for the evaluation of biogenic gas source rocks, and are also the research areas to be strengthened in the future.

关 键 词：生物气 源岩 微生物 评价指标 

分 类 号：TE122.113[石油与天然气工程—油气勘探]