Formation Conditions and Existing Evidences of Biogenic Gas in the Mohe Basin, China
详细信息
- 责任者：Miao Zhongying (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Wang Jing
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(3)
- 关键词：生物气 ; biogenetic gas ; 油气藏形成 ; reservoir formation ; 黑龙江省 ; Heilongjiang Province
- 页码：p.512-519
- 图表：5 illus., 1 table, 38 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Biogenic methane is an important resource which exists in conventional microbial gas reservoir,and unconventional microbial gas,such as hydrate,shale gas,coalbed methane,and so on.By the analysis of the living environment of microbes,such as temperature,salinity,pH,living space,nutrient substrates,and so on,and combined with the evidence for active microbe,it′s thought that:(1)The appropriate formation water salinity,moderate pH,abundant nutrition are beneficial for the microbial life activities.(2)The phenomenon of GC presenting bulge phenomenon,the detected 25-norhopane,ethene and propene,theδ13 C1<-60‰,and the emergence of biogenic gas in the adjacent areas,and so on,is the evidences of the existence of biogenic gas in the area.(3)Influenced by the seasonal variation,the primary biogenic gases of acetate fermentation are formed periodically;the reduced secondary biogenic gases of carbon dioxide are formed in the micro-fractures member of Upper Jurassic.In the Mohe Basin,biogenic gas is not only the important natural gas resource style,but also one of the potential gas sources of hydrate.
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