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现代地质 ›› 2005, Vol. 19 ›› Issue (Suppl): 80-86.

• 石油地质 • 上一篇    下一篇

准噶尔盆地腹部侏罗系三工河组沉积体系分析

王居峰1,2,邓宏文1,谢晓军1   

  1. 1中国地质大学 能源学院,北京100083; 2胜利油田有限公司 地质科学研究院,山东 东营257015
  • 收稿日期:2004-09-02 修回日期:2004-10-28 出版日期:2005-03-20 发布日期:2013-04-08
  • 作者简介:王居峰,男,工程师,博士研究生,1968年出生,石油地质学专业,主要从事层序地层与油气勘探的研究工作。

ANALYSIS OF THE SEDIMENTARY SYSTEM OF SANGONGHE FORMATION OF JURASSIC IN THE MIDDLE OF JUNGGAR BASIN

WANG Ju-feng1,2,DENG Hong-wen1,XIE Xiao-jun1   

  1. 1 China University of Geosciences,Beijing100083,China;
    2Geological Research Institute of Shengli Oilfield Company Limited,Dongying,Shandong257015,China
  • Received:2004-09-02 Revised:2004-10-28 Online:2005-03-20 Published:2013-04-08

摘要:

以研究区的岩心观察为基础,结合砂岩含量的变化及钻井、测井特征和地震反射标志等,总结了准噶尔盆地腹部侏罗系三工河组的沉积微相类型及相标志,指出三工河组沉积时期砂体沉积微相的发育与分布主要受北东和北西方向物源体系的控制。由于不同沉积时期基准面与A/S比值的动态变化、物源体系特征及古地貌形态等的差异,导致了研究区东、西部沉积相类型及演化特征的不同。垂向上,沉积相经历了由辫状河三角洲(扇三角洲)—曲流河三角洲—湖相的变化,其中三工河组中、晚期形成的三角洲前缘河口坝砂体和水下分支水道砂体是最重要的勘探目标。

关键词: 准噶尔盆地, 侏罗系, 三工河组, 沉积体系, 演化

Abstract:

This paper summarized the microfacies-types and indicators of the Jurassic Sangonghe Formation in the middle of Junggar Basin based on core observation and combining the variation of sandstone percentage as well the drilling/logging characteristics and seismic reflection indicators, and pointed out that the growth and distribution of the sandbody's microfacies in Sangonghe stage are dominated by the depositional sources from both the northeast and the northwest directions. The changes of datum level and A/S ratio and the diversity of depositional sources and palaeogeomorphology in different sedimentary stages caused the variance of the sedimentary facies and their evolution characteristics. Vertically, the sedimentary facies experiences the course of braided river delta (fan delta)-meandering river delta-lacustrine, among which the mouth bar sandbodies at the delta front and those of underwater branched channels are important targets for exploration.

Key words: Junggar Basin, Jurassic, Sangonghe Formation, sedimentary system, evolution

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