天然气地球科学

• 天然气地质学 • 上一篇    下一篇

漠河盆地生物气形成条件及存在证据

苗忠英,王晶,潘春孚,何大祥,赵兴齐   

  1. 1.中国地质科学院矿产资源研究所,北京 100037; 2.中国石油新疆油田公司陆梁作业区,新疆 克拉玛依 834000; 3.中国石油勘探开发研究院廊坊分院, 河北 廊坊 065007; 4.中国石油大学油气资源与探测国家重点实验室,北京 102240
  • 收稿日期:2012-11-29 修回日期:2013-01-21 出版日期:2013-06-10 发布日期:2013-06-10
  • 通讯作者: 苗忠英zhymiao@foxmail.com. E-mail:zhymiao@foxmail.com.
  • 作者简介:苗忠英(1982-),男,吉林通化人,博士后,主要从事常规与非常规天然气藏形成机理及分布规律研究.E-mail:zhymiao@foxmail.com.
  • 基金资助:

    国家自然科学基金(编号:41202100);“天然气水合物资源勘查与试采工程”国家专项(编号:GZHL20110322)联合资助.

Formation Conditions and Existing Evidences of Biogenic Gas in the Mohe Basin,China

MIAO Zhong-ying,WANG Jing,PAN Chun-fu,HE Da-xiang,ZHAO Xing-qi   

  1. 1.Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China; 2.Luliang Oilfield Operation District,PetroChina Xinjiang Oilfield Company,Karamay 834000,China; 3.Langfang Branch of PetroChina Exploration and Development Research Institute,Langfang 065007,China; 4.State Key Laboratory of Petroleum Resource and Prospecting in China University of Petroleum,Beijing 102240,China
  • Received:2012-11-29 Revised:2013-01-21 Online:2013-06-10 Published:2013-06-10

摘要:

生物气不仅能以常规生物气藏的形式存在,而且还能以水合物、页岩气或煤层气等非常规形式存在,是非常重要的天然气资源。通过分析漠河盆地微生物生存所需的温度、盐度、酸碱度、生存空间和营养底物来源等条件,并结合微生物生命活动的证据认为:①漠河盆地地层水盐度不高、酸碱度适中、营养底物充足,具备微生物生命活动所需的基本条件;②饱和烃气相色谱出现“鼓包”现象,检测出25-降藿烷、乙烯和丙烯,δ13C1值小于-60‰,以及相邻地区发现生物气等现象是该区存在生物气的证据;③第四系受季节变换的影响,可周期性生成乙酸发酵型原生生物气;上侏罗统微裂缝发育段可形成CO2还原型次生生物气。生物气不仅是漠河盆地重要的天然气资源类型,也是天然气水合物潜在的气源之一。

关键词: 生物气, 生存环境, 营养底物, 地球化学, 生烃模式, 漠河盆地

Abstract:

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,the δ13C1<-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. 

Key words: Biogenic gas, Living environment, Nutrient substrates, Geochemistry, Hydrocarbon generation model, Mohe Basin

中图分类号: 

  • TE121.1+1
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