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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

库车前陆盆地牙哈构造带油气成藏过程研究

刘建良，姜振学，刘可禹,桂丽黎，李峰，邢金艳   

  1. 1.中国石油勘探开发研究院,北京 10008;2.中国石油天然气集团公司盆地构造与油气成藏重点实验室,北京 10008;
    3.中国石油大学(北京)非常规天然气研究院,北京 10224;
    4.CSIRO Earth Science and Resource Engineering,Bentley WA 6102,Australia
  • 收稿日期:2014-03-17 修回日期:2014-05-18 出版日期:2015-01-10 发布日期:2015-01-10
  • 作者简介:刘建良(1988-)，男，河北石家庄人，博士研究生，主要从事含油气系统定量分析. E-mail:51liujianliang@163.com.
  • 基金资助:
    典型前陆盆地致密储层天然气藏形成机理与成藏模式(编号:2011ZX05003-001)|盆地深层致密砂岩气藏形成机理、过程与评价技术(编号:2011ZX05008-004)联合资助.
     

Hydrocarbon Accumulation Process of the Yaha Tectonic Belt,Kuqa Foreland Basin

LIU Jian-liang，JIANG Zhen-xue,LIU Ke-yu,GUI Li-li，LI Feng,XING Jin-yan   

  1. 1.Research Institute of Petroleum Exploration & Development,Beijing 100083,China；
    2.CNPC Key Laboratory of Basin Structure and Hydrocarbon Accumulation,Beijing 100083,China；
    3.Institute of Unconventional Natural Gas Research,China University of Petroleum,Beijing 102249,China；
    4.CSIRO Earth Science and Resource Engineering,Bentley WA 6102,Australia
  • Received:2014-03-17 Revised:2014-05-18 Online:2015-01-10 Published:2015-01-10

PDF (PC)

544

摘要：

利用流体包裹体岩相观察、定量颗粒荧光技术、全扫描荧光分析等实验方法，结合原油和天然气物理及地球化学特征，系统地探讨了牙哈构造带的油气成藏过程。研究表明，牙哈构造带经历了2期油气成藏过程：第一期发生在吉迪克组沉积期(23~12Ma)，以三叠系黄山街组成熟的原油充注为主，该期原油充注量较少，原油从烃源岩排出并经过长距离侧向运移后，从牙哈构造带西侧注入，再向东部运移，在牙哈2地区古近系—白垩系储层中形成46m的古油层，吉迪克组储层内未见古油层|第二期发生在库车组沉积以后(5~0Ma)，以中下侏罗统大量成熟—高成熟煤型气充注为主，天然气分别从构造带东西两侧注入，再向中部聚集，天然气首先在浮力作用下向圈闭顶部聚集，迫使古油水界面向下迁移，后由于天然气持续充注，原油遭受气洗，最终形成现今凝析气藏。

关键词: 库车前陆盆地, 牙哈构造带, 流体包裹体, 定量荧光, 油气运移, 成藏过程

Abstract:

Hydrocarbon accumulation process of the Yaha tectonic belt in the Kuqa foreland basin was investigated using an integrated fluid inclusion,quantitative grain fluorescence and total scanning fluorescence analysis in combination with the oil and gas characteristics in the area.The results show that there are two episodes of hydrocarbon accumulation in the Yaha tectonic belt.During the deposition of the Jidike Member,mature oil,was sourced from the Triassic Huangshanjie Member,charged into the Yaha tectonic belt from the western side via long distance lateral migration and migrated to the east along the tectonic belt.A 46-meter long palaeo-oil column was accumulated in the E+K reservoirs in Yaha2 area.From the time of the deposition of the Kuqa Formation to present,a large amount of mature to high mature coal-type gases,were sourced from the Middle-Lower Jurassic,charged into the Yaha tectonic belt from both the west and east sides simultaneously and then migrated to the middle part of the belt.The gas firstly accumulated to the top of the trap due to buoyancy and forced the palaeo-oil-water contact shifting downward.As the gas charge and gas-oil interaction continued,the early charged oil was dissolved and finally formed the current condensate gas reservoir.
 

Key words: Kuqa Foreland Basin, Yaha tectonic belt, Fluid inclusions, Quantitative fluorescence, Hydrocarbon migration, Accumulation process

中图分类号: 

  • TE122.1

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