天然气地球科学 ›› 2012, Vol. 23 ›› Issue (2): 284–290.doi: 10.11764/j.issn.1672-1926.2012.02.284

• 天然气地质学 • 上一篇    下一篇

歧口凹陷古近纪坡折带特征及控沉作用

张志攀,卢异,付立新,廉梅,王辉,陈宪保   

  1. 中国石油大港油田分公司,天津 300280
  • 收稿日期:2011-11-30 修回日期:2012-02-03 出版日期:2012-04-10 发布日期:2012-04-10
  • 通讯作者: 张志攀zhang2717@163.com. E-mail:zhang2717@163.com.
  • 作者简介:张志攀(1981-),男,河北饶阳人,工程师,硕士,主要从事地震解释及石油构造地质研究.E-mail:zhang2717@163.com.
  • 基金资助:

    中国石油天然气股份公司重大专项(编号:2008E-0601)资助.

Characteristics of Paleogene Slop-breaks in Qikou Sag and It′s Controlling Effect on Sedimentation

ZHANG Zhi-pan, LU Yi, FU Li-xin, LIAN Mei, WANG Hui, CHEN Bao-xian   

  1. Exploration and Development Research Institute of Dagang Oilfield, PetroChina, Tianjin 300280, China
  • Received:2011-11-30 Revised:2012-02-03 Online:2012-04-10 Published:2012-04-10

摘要:

歧口凹陷古近纪为典型的箕状断陷盆地,斜坡背景广泛分布,发育断裂、挠曲、侵蚀、沉积等多种成因类型坡折带。以高精度三维地震资料精细构造解析为基础,对各种类型坡折结构特点、发育演化及成因模式等进行深入分析,探讨古近纪坡折带发育对沉积的控制作用。研究认为歧口凹陷发育构造、沉积、侵蚀等多种成因类型坡折带,构造坡折带样式受断裂特征及其组合控制,主要表现为单阶式和多阶式;坡折带形成及演化受古近纪基底先存构造、伸展、走滑等多重因素共同控制;构造作用形成的沟槽、转换带形成沉积物输入与其在盆内分散的通道,坡折带控制沉积相带的分异,物源大小及与斜坡倾向匹配关系控制层序样式及物源波及范围。

关键词: 斜坡区, 坡折带, 歧口凹陷, 黄骅坳陷

Abstract:

The Paleogene Qikou sag is a typical half-graben,with slope setting wide spread and several different genetic-type slope-breaks (i.e.faulted,flexure,eroded & sedimentary).Based on high resolution 3D seismic interpretation,we analyzed structure characteristics,evolutionary process & genetic origin of each type of the slope-break.The genetic origin of slope-break in the Qikou sag is of tectonic,sedimentation and erosion.The tectonic slope-break is controlled by characters and styles of faults,associated with simple and multi-step.The formation and evolution of slope-break was controlled by tectonic events including stretch in cap-rock,paleo-structure & strike-slipe in the Paleogene base-rock.The trench gap or transfer zone generated by tectonic events played as the channels for sedimentary input and diffusion.The slope-break made the sedimentary faces separate each other.Both amounts of sedimentary provenances and slope character constrain the stack style and the affected area of the sedimentary provenances.

Key words: Slope, Slope-break, Qikou sag, Huanghua depression.

中图分类号: 

  • TE122.3

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