天然气地球科学 ›› 2012, Vol. 23 ›› Issue (4): 707–712.doi: 10.11764/j.issn.1672-1926.2012.04.707

• 天然气地质学 • 上一篇    下一篇

冀中坳陷马西洼槽异常高压与油气成藏

侯凤香,董雄英,吴立军,李向阳,侯凤梅   

  1. 1.中国石油华北油田勘探开发研究院,河北 任丘 062552;
    2.中国石油东方地球物理责任有限公司,河北 任丘 062552
  • 收稿日期:2012-02-02 修回日期:2012-03-09 出版日期:2012-08-10 发布日期:2012-08-10
  • 通讯作者: 侯凤香yjy_hfx@petrochina.com.cn. E-mail:yjy_hfx@petrochina.com.cn.
  • 作者简介:侯凤香(1969-),女,河南杞县人,高级工程师,主要从事石油地质勘探综合研究. E-mail:yjy_hfx@petrochina.com.cn.
  • 基金资助:

    中国石油重大科技攻关项目“成熟探区油气分布规律与精细勘探技术研究”(编号:20011D-07);中国石油重大科技攻关项目“成熟盆地油气成藏机制与精细勘探目标评价”项目(编号:2011D-0703)联合资助.

Abnormal Overpressure and Hydrocarbon Pooling in Maxi Sag,Jizhong Depression

HOU Feng-xiang,DONG Xiong-ying,WU Li-jun,LI Xiang-yang,HOU Feng-mei   

  1. 1.Exploration and Development Research Institute,Huabei Oilfield Company,PetroChina,Renqiu 062552,China;
    2.BGP Company,CNPC,Renqiu 062552,China
  • Received:2012-02-02 Revised:2012-03-09 Online:2012-08-10 Published:2012-08-10

摘要:

冀中坳陷马西洼槽古近系沙河街组普遍发育异常高压带,异常高压主要发育在沙二段、沙三段,其中沙三上亚段最大压力系数达1.37,且异常压力系数由洼槽向洼缘逐渐降低。烃源岩生排烃是该区形成异常高压的主要原因。异常高压对马西洼槽油气成藏主要有3种作用:一是改善储层;二是增加盖层的封闭性;三是为油气运聚成藏提供动力。在此基础上建立了任东斜坡区高压—中孔岩性—构造油藏、洼槽区高压—中孔构造—岩性油藏及南马庄陡坡区常压—中高孔岩性或构造岩性复合油藏等3种成藏模式。

关键词: 马西洼槽, 异常高压, 油气成藏, 成藏模式

Abstract:

In Maxi area,abnormal overpressure occurs widely in the lower Tertiary Shahejie Formation,including the second and third members of the Shahejie Formation,especially the upper of the third member of Shahejie Formation with pressure coefficient over 1.37.Laterally,the pressure coefficient decreases from central part of sag to the edge.The major cause of the overpressure is related to the hydrocarbon generation.Three functions of overpressure for hydrocarbon pooling in the sag follow as:improve reservoir property,enhance sealing capability,and provide the power for the deep hydrocarbon migration.Thus,the overpressure is important to hydrocarbon migration.We establish the pattern of overpressure-moderate pore-structural petroleum pool in the Rendong slope,the pattern of overpressure-moderate pore-lithological petroleum pool in the central part of Maxi sag,and the pattern of overpressure-moderate and high pore-structural and lithological composite petroleum pool in Nanmazhuang slope.

Key words: Maxi sag, Overpressure, Hydrocarbon accumulation, Accumulation pattern

中图分类号: 

  • TE121

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