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现代地质 ›› 2010, Vol. 24 ›› Issue (4): 669-677.

• 石油地质 • 上一篇    下一篇

海拉尔盆地乌南凹陷下白垩统沉积充填演化及构造控制

储呈林1,林畅松1,朱德丰2   

  1. 1.中国地质大学 能源学院, 北京100083; 2.大庆油田有限责任公司 勘探开发研究院, 黑龙江 大庆163712
  • 出版日期:2010-07-23 发布日期:2010-09-05
  • 作者简介:储呈林,男,博士研究生,1982年出生,矿产普查与勘探专业,主要从事沉积学与盆地分析研究工作。 Email:cclin7101@126.com。
  • 基金资助:

    国家自然科学基金项目(40972081)。

Sedimentary Filling Evolution and Tectonic Control of the Lower Cretaceous of the Wunan Depression in Hailaer Basin

CHU  Cheng-Lin1, LIN  Chang-Song1, ZHU  De-Feng2   

  1. 1.School of Energy Resources, China University of Geosciences, Beijing100083, China; 
    2.Research Institute of Exploration and Development, Daqing Oilfield Company Ltd, Daqing, Heilongjiang163712, China
  • Online:2010-07-23 Published:2010-09-05

摘要:

通过层序界面的识别和划分,乌南凹陷下白垩统可划分为5个二级层序,7个三级层序。以断裂坡折带为界,乌南凹陷可划分为西缘陡坡带、东缘斜坡带、乌南次洼带、乌中低凸起、巴彦塔拉断裂带等次级构造单元,各次级构造单元对沉积体系的发育分布具有重要的控制作用。根据沉降史的分析,下白垩统可划分为裂陷初期、裂陷早期、裂陷中期、断-拗转换期和拗陷期5个构造演化阶段,分别发育火山岩-冲积扇盆地层序、冲积扇-浅湖盆地层序、深湖-半深湖盆地层序、半深湖盆地层序和浅湖盆地层序,各二级层序的发育演化和沉积相构成受构造演化的控制。东缘斜坡带和巴彦塔拉断裂带附近是有利储集相带。

关键词: 层序地层, 沉积体系, 构造沉降, 乌南凹陷

Abstract:

According to the recognition and division of the sequence boundaries, the Lower Cretaceous of Wunan depression can be divided into five two-order sequences and seven third-order sequences. Wunan depression is composed of western steep slope zone, eastern gentle slope zone, Wunan sag, Wuzhong uplift and Bayantala fault zone. Each sub-structural unit constrains the development and distribution of sedimentary systems. The tectonic subsidence analysis suggests that the evolution of the Wunan depression can be divided into five stages: early rifting stage, initial rifting stage, intense rifting stage, rifting-subsiding stage and subsiding stage. Alluvialvolcanic basin sequence, alluvialshallow lacustrine basin sequence, semi-deep lacustrine-deep lacustrine basin sequence, semi-deep lacustrine basin sequence and shallow lacustrine basin sequence are developed respectively. The evolution and sedimentary facies of each two-order sequence was controlled by the different stages. The slope region in the east and the Bayantala fault zone are the favorable reservoir belts.

Key words:  sequence stratigraphy, sedimentary system, tectonic subsidence, Wunan depression

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