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天然气地球科学

• 天然气地质学 • 上一篇    下一篇

古生界复式油气聚集特征及形成条件

谭吕,王力群   

  1. 中海石油(中国)有限公司天津分公司， 天津 300452
  • 收稿日期:2013-01-31 修回日期:2013-03-18 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 谭吕tanlv@cnooc.com.cn. E-mail:tanlv@cnooc.com.cn.
  • 作者简介:谭吕（1970-），男，湖南醴陵人，高级工程师，硕士，主要从事石油勘探开发与设计研究. E-mail：tanlv@cnooc.com.cn.

Hydrocarbon Accumulation Characteristics and the FormationMechanism of Palaeozoic Reservoir in Tazhong Area

TAN Lü,WANG Li-qun   

  1. China National Offshore Oil Corporation Tianjin Branch,Tianjin 300452,China
  • Received:2013-01-31 Revised:2013-03-18 Online:2013-04-10 Published:2013-04-10

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摘要： 中国古生代油气资源丰富，地质条件复杂，也是中国典型的复式油气成藏聚集层系。基于对中国西部海相含油气盆地的油气勘探情况，对源岩、储层类型、盖层类型及运移通道等主要油气成藏要素综合分析，论述了多套烃源岩多期油气充注历史，认为：油气藏类型复杂，具有多套储盖组合，上,下层系间储盖组合差异大;圈闭类型复杂，主要包括背斜圈闭、断块圈闭、礁滩体圈闭、砂砾岩岩性圈闭和火山岩刺穿圈闭等;油气运移通道类型多样，主要包括断裂、不整合面、缝洞体和砂岩层段等，其中断裂主要作为纵向上的运移通道，不整合面、缝洞体及砂岩层段在横向上的运移作用明显。研究认为，多期构造运动和沉积演化叠加是复式油气藏形成的基础，多套烃源岩的多期生烃作用是复杂油气藏形成的主要因素，输导断裂和储层发育等地质条件的差异性是油气藏类型多样及分布复杂的重要因素。该成果对推动中国海相盆地油气勘探和复式油气成藏理论的发展具有重要意义。

关键词: 复式油气藏, 聚集特征, 形成机制, 碳酸盐岩, 古生代

Abstract:

Palaeozoic central Tarim basin which is complex in geology and rich in hydrocarbon is a typical composite reservoir area.Based on the production and research data obtained by now,by multidisciplinary analyses on the hydrocarbon source rocks,reservoir types,cap rock,and migration pathway of Tazhong area,the following conclusions have reached.Multiple phase hydrocarbon charging occurred in Tazhong area with multiple source rocks,and the reservoir types are complicated with multiple reservoir-cap groups.The traps include anticline,fault depression,reef flat,lithologic trap,magmatic trap and so on.Migration pathway includes fault,unconformity,fracture-hole,sandstone formation and so on,among which fault is mainly a vertical pathway,and the unconformity,fracture-hole and sandstone formation are mainly lateral pathways.Studies suggest that multiple tectonic movements and sedimentary evolution are a fundamental cause for the composite reservoir formation;multiple source rocks and multiple hydrocarbon chargings are the base of complex reservoir;inhomogeneous geology condition,especially faults and reservoir,is the direct cause for multiple types of reservoirs and its complex distribution.This research result is significant for the composite reservoir theory's advancement and for the hydrocarbon exploration in Tazhong area.

Key words: Composite reservoir, Accumulation characteristics, Formation mechanism, Carbonate, Palaeozoic

中图分类号: 

  • TE122.1

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