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现代地质 ›› 2005, Vol. 19 ›› Issue (Suppl): 101-104.

• 石油地质 • 上一篇    下一篇

半地堑湖盆沉积体系的地球物理响应特征与勘探意义——以二连盆地乌里雅斯太断陷中次洼为例

史淑玲1,张海峰2,张庆德3,王玉生2   

  1. 1中国地质大学 地球科学与资源学院,北京100083;
    2中国地质大学 能源学院,北京100083;
    3中国石油集团测井有限公司 国际项目部,陕西 西安710021
  • 收稿日期:2004-09-17 修回日期:2004-11-05 出版日期:2005-03-20 发布日期:2013-04-08
  • 作者简介:史淑玲,女,博士研究生,1969年出生,岩石学、矿物学、矿床学专业,主要从事层序地层学、沉积学、测井解释方法的研究。

GEOPHYSICAL CHARACTERISTICS AND EXPLORATORY SIGNIFICANCE OF THE DEPOSITIONAL SYSTEMS IN THE HALF-GARBEN BASIN:TAKING THE MIDDLE OF WULIYASITAI DEPRESSION AS AN EXAMPLE

SHI Shu-ling1,ZHANG Hai-feng1,ZHANG Qing-de2, WANG Yu-sheng1   

  1. 1China University of Geosciences, Beijing100083,China;
    2International Project Department, Petrochina Well Logging Company Limited,Xi'an,Shaanxi 710021,China
  • Received:2004-09-17 Revised:2004-11-05 Online:2005-03-20 Published:2013-04-08

摘要:

以内蒙古二连盆地乌里雅斯太断陷中次洼为例,提出了在半地堑湖盆背景下形成的沉积体系类型主要为辫状河三角洲、低位楔、湖底扇和近岸扇。沉积体系的分布受坡折带控制,在陡坡带—洼槽带发育近岸扇—盆底扇沉积体系;在缓坡带—洼槽带发育辫状河三角洲—低位楔—盆底扇沉积体系。概括了各种类型沉积体系的地震反射和测井响应特征。位于缓坡带和洼槽带的沉积体系为可能有效储层,分别与不同期次的最大洪泛面相形成良好的生、储、盖组合。

关键词: 二连盆地, 乌里雅斯太断陷, 沉积体系, 坡折带, 地震反射特征, 测井响应

Abstract:

The middle Wuliyasitai faulted depression is taken as an example of half-garben, the depositional systems of which include braided channel delta, lowstand wedge, basin-floor fan and nearshore fan. The spatial distribution of depositional systems is controlled by a slope break zone. It is found that a basin floor fan is deposited in the depression margin followed by a near shore fan in a steep slope. A braided fan delta and lowstand wedge and basin floor fan are  deposited in a gentle slope and a depression margin. The characteristics of depositional systems are generalized with well logging responses and sesimic reflections.The depostional systems are deposited in the gentle slope and depression margins collocated with the maximum flooding surfaces to form effective source-reservoir-cap rock assemblages.

Key words: Erlian basin, Wuliyasitai depression, depositional system, slope break zone, seismic reflection characteristic, well logging response

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