天然气地球科学

• 天然气地球化学 • 上一篇    下一篇

塔里木盆地库车坳陷东部烃源岩热模拟轻烃特征及成因判识

卢斌,李剑,冉启贵,林潼,李德江,刘卫红   

  1. 1.中国科学院渗流流体力学研究所,河北 廊坊 065007;2.中国石油勘探开发研究院廊坊分院,河北 廊坊 065007;
    3.中国石油天然气集团公司天然气成藏与开发重点实验室,河北 廊坊 065007;
    4.中化石油勘探开发有限公司,北京 100031
  • 收稿日期:2014-08-26 修回日期:2015-01-10 出版日期:2015-06-10 发布日期:2015-06-10
  • 通讯作者: 李剑(1966-),男,河北怀安人,教授级高级工程师,博士,主要从事油气地球化学研究. E-mail:lijian69@petrochina.com.cn.
  • 作者简介:卢斌(1988-),男,四川遂宁人,硕士研究生,主要从事油气地球化学研究. E-mail:lubin0921@163.com.
  • 基金资助:

    国家科技重大专项“大气田形成条件、成藏机制与富集规律研究”(编号:2011ZX05007-002)资助.

Geochemical Characteristics and Genetic Identification of Light Hydrocarbon generated in the Thermal Pyrolytic Experiments of Source Rocks from the East of Kuqa Depression,Tarim Basin

LU Bin,LI Jian,RAN Qi-gui,LIN Tong,LI De-jiang,LIU Wei-hong   

  1. 1.Institute of Porous Flow Fluid mechanics,Chinese Academy of Sciences,Langfang 065007,China;
    2.Langfang Branch,PetroChina Exploration and Development Research Institute,Langfang 065007,China;
    3.Key Laboratory of Gas Reservoir Formation and Development,CNPC,Langfang 065007,China;
    4.Sinochem Petroleum Exploration & Production Co.Ltd.,Beijing 100031,China
  • Received:2014-08-26 Revised:2015-01-10 Online:2015-06-10 Published:2015-06-10

摘要:

塔里木盆地库车坳陷东部地区存在三叠系和侏罗系2套烃源岩,二者沉积环境和母质类型相似,如何对这2套烃源岩进行判识一直是地球化学研究所面临的一个难题。通过利用烃源岩热模拟轻烃在线分析技术,对库车坳陷东部三叠系和侏罗系烃源岩进行了轻烃热模拟分析。研究发现,库车坳陷东部三叠系和侏罗系烃源岩成因类型相似,均为典型的陆相煤系烃源岩,并且可以依据支链烷烃和芳香烃相对百分含量对这2套烃源岩进行判识,三叠系支链烷烃相对百分含量主要介于28%~38%之间,而侏罗系支链烷烃相对百分含量主要介于10%~27%之间,三叠系芳香烃相对百分含量主要分布在5%~25%范围内,而侏罗系芳香烃相对百分含量主要分布在20%~65%范围内。研究成果对于库车坳陷东部地区油气成藏理论研究和勘探生产部署具有重要的指导意义。

关键词: 塔里木盆地, 库车坳陷, 烃源岩, 轻烃, 地球化学, 成因判识

Abstract:

Two sets of source rocks existed in the Triassic and Jurassic formations in the eastern part of Kuqa Depression,Tarim Basin.These two sets of source rocks have similar deposition environment and genetic types.How to identify these two sets of source rocks has always been a problem of the geochemical research.The online analytic technique of thermal pyrolytic light hydrocarbon was used to analyze the light hydrocarbon of produced in the pyrolytic experiment of source rocks from the east part of Kuqa Depression.Both of the source rocks in Triassic and Jurassic formations are typically terrestrial origin and can be identified by the relative percentage of branched alkanes and aromatic hydrocarbon.The relative content of branched alkanes in Triassic source rocks is mainly between 28%-38%,and it is 10%-27% in the Jurassic source rocks.The relative content of the aromatic hydrocarbon in Triassic is mainly between 5%-25%,and it is 20%-65% in the Jurassic.Research results have important guiding significance on the hydrocarbon accumulation theory and exploration and production deployment of the eastern Kuqa Depression.

Key words: Tarim Basin, Kuqa Depression, Source rocks, Light hydrocarbon, Geochemical characteristics, Genetic identification

中图分类号: 

  • TE122.1

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