石油与天然气地质 ›› 2010, Vol. 31 ›› Issue (5): 671-677.doi: 10.11743/ogg20100517

• 石油与天然气地质 • 上一篇    下一篇

珠江口盆地西部珠江组潮流砂脊的分布、形态和水动力机制

  

  1. 中国地质大学资源学院，湖北武汉430074
  • 出版日期:2010-10-28 发布日期:2010-12-10
  • 作者简介:李俊良，（1973—），男，博士研究生，高工，油气勘探。
  • 基金资助:

    国家科技重大专项（2009ZX05009—002）。

D istribution，geom etry and hydrodynam ic m echanism of tidal sand ridges in the Zhujiang Form ation，the western Zhujiangkou Basin

  • Online:2010-10-28 Published:2010-12-10

PDF (PC)

847

被引次数

19

摘要：

综合地震、钻井及测井资料，运用层序地层学理论，研究认为珠江口盆地西部珠江组一段上部泥质粉砂岩低阻油层砂体为潮流砂脊砂体，对潮流砂脊的形态与平面展布特征进行了研究，探讨了潮流砂脊的水动力特点与形成机制，并在珠江组一段上部识别出四期水道，分析了潮流水道的分布及井震特征。指出水道内潮流砂脊构造-岩性圈闭和水道侧向遮挡构造-岩性圈闭两种有利的潮流砂脊隐蔽圈闭。

关键词: 低阻油层, 潮流砂脊, 珠江组, 文昌凹陷, 珠江口盆地

Abstract:

An integration of seism ic，drilling and logging datawith sequence stratigraphic theories reveals that the oil-bearing argillaceous siltstones of low-resistivity at the upper part of the firstmember of the Zhujiang Formation in western Zhujiangkou Basin are tidal sand ridges.This paper studies their geometry and planar distribution，and discusses their hydrodynam ic features and form ingmechanism.Four stages ofwater channels are identified in the upper part of the firstmember of the Zhujiang Formation，and their distribution aswell as logging and seism ic characteristics are also analyzed.It is suggested that there are two kinds of potential subtle traps:intrachannel tidal sand ridge structural-stratigraphic traps and channel lateral-sealing structural-stratigraphic traps.

Key words: low-resistivity oil layer, tidal sand ridge, Zhujiang Formation, Wenchang Sag, Zhujiangkou Basin