石油与天然气地质 ›› 2009, Vol. 30 ›› Issue (1): 97-101,107.doi: 10.11743/ogg20090114

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松辽盆地二氧化碳成因判识与分布规律

鲁雪松1, 王兆宏2, 魏立春1,3, 柳少波1, 洪峰1   

  1. 1. 中国石油天然气股份有限公司, 石油勘探开发研究院, 北京, 100083;
    2. 中国石油大学, 北京, 102249;
    3. 中国石油大学, 盆地与油藏研究中心, 北京, 102249
  • 收稿日期:2008-08-11 出版日期:2009-02-25 发布日期:2012-01-16
  • 基金项目:

    中国石油天然气股份有限公司重大科技专项(07-02Z-01-01)

Origin and distribution patterns of carbon dioxide in the Songliao Basin

Lu Xuesong1, Wang Zhaohong2, Wei Lichun1,3, Liu Shaobo1, Hong Feng1   

  1. 1. PetroChina Exploration and Development Research Institute, Beijing 100083, China;
    2. China University of Petroleum, Beijing 102249, China;
    3. Basin & Reservoir Research Center, China University of Petroleum, Beijing 102249, China
  • Received:2008-08-11 Online:2009-02-25 Published:2012-01-16

摘要:

运用CO2碳同位素、3He/4He和CO2/3He比值判断松辽盆地高含量的CO2皆为幔源成因。松辽盆地CO2的分布具有极大的不均匀性,研究结果表明,松辽盆地CO2在含量上具有"两端元"的分布特征;受区域盖层和储层性质的控制,CO2在层位上主要富集于白垩系营城组和泉头组四段地层中;在平面上CO2呈多个点状或狭长带状局限分布,明显受控于深大断裂,与基底大断裂和火山岩体具有较好的成生关系。常规烃类气和幔源CO2因同受基底大断裂控制,并共享某些圈闭和储层要素而耦合混杂分布在一起。幔源CO2运聚通道组合类型在很大程度上决定了火山岩气藏中烃类气和CO2相对含量的大小以及含CO2天然气的赋存层位。

关键词: 幔源成因, 运聚通道, 成因类型, 二氧化碳, 松辽盆地

Abstract:

Various indexes such as CO2 carbon isotope,3He/4He and CO2/3He ratios show that CO2 with high content in the Songliao Basin is mantle-derived gas.Distribution of CO2 in the Songliao Basin is highly uneven.The content of CO2 in the Songliao Basin shows a kind of "two-end member" distribution.Vertically,CO2 are mainly concentrated in the Yingcheng Formation and the fourth member of the Quantou Formation and their distribution is under the control of regional caprock and reservoir characteristics.While laterally,they are locally distributed in several patchy or narrow-and-long zonal areas,and their distribution is obviously under the control of deep major faults and has relatively close genetic relations with the basement faults and volcanic rock bodies.Conventional hydrocarbon gas and mantle-derived CO2 occur in hybrid,as both of them are controlled by the major basement faults and sharing some trap and reservoir elements.It was pointed out that,to a great extent,the combination type of pathways for mantle-derived CO2 migration and accumulation determined the relative content of CO2 and hydrocarbon gas in volcanic reservoirs and accumulating horizons of CO2-bearing natural gas.

Key words: mantle-derived origin, migration and accumulation pathway, genetic type, carbon dioxide, Song-liao Basin

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