渤海西部孔店组—沙河街组盆地构造特征及形成动力机制

doi:10.11743/ogg20130610

石油与天然气地质 ›› 2013, Vol. 34 ›› Issue (6): 781-789.doi: 10.11743/ogg20130610

渤海西部孔店组—沙河街组盆地构造特征及形成动力机制

李明刚¹, 吴景富¹, 吴克强¹, 刘朋波², 杨海峰²

1. 中海油研究总院, 北京 100027;
2. 中海石油(中国)有限公司天津分公司渤海油田勘探开发研究院, 天津 300452

收稿日期:2013-02-08 修回日期:2013-06-25 出版日期:2013-12-08 发布日期:2014-01-04
作者简介:李明刚（1979- ），男，工程师，石油地质。E-mail：lmg0824@163.com。
基金资助:
国家科技重大专项（2011ZX05023-006）。

Structure features and dynamic mechanism of basin formation in Kongdian-Shahejie periods in western Bohai Sea

Li Minggang¹, Wu Jingfu¹, Wu Keqiang¹, Liu Pengbo², Yang Haifeng²

1. Research Institute of CNOOC, Beijing 100027, China;
2. Exploration and Development Research Institute of Bohai Oilfield, Tianjin Branch of CNOOC Ltd, Tianjin 300452, China

Received:2013-02-08 Revised:2013-06-25 Online:2013-12-08 Published:2014-01-04

摘要/Abstract

摘要： 为了揭示孔店组—沙河街组烃源岩层系的分布特征，指导渤海西部区带评价和目标优选，在整体研究和对比分析的基础上，运用油区构造解析理论，对渤海西部孔店组—沙河街组沉积时期盆地的构造特征进行了分析，并对其形成动力机制作了探讨。研究认为，盆地结构受基底构造控制，对应不同类型的结晶基底，构造变形东西分区，同时受到NE-NNE向和NW-NWW向两组共轭先存基底断裂作用，西区具有东西分带、南北分块的特点，而东区则具有南北分带、东西分块的特点；孔店组—沙河街组不同沉积时期盆地构造特征差异较大，总体表现出坳断-断陷-断坳（坳陷）的演化序列特征；地幔底辟诱导的与地幔隆起轴向垂直的引张应力场控制了渤海西部孔店组—沙河街组沉积时期的构造变形，其中东区的构造变形主要受近SN向引张应力场控制，西区则总体存在NW-SE向和近SN向两个引张应力场叠加的构造环境。

关键词: 油区构造解析, 构造特征, 动力机制, 孔店组, 沙河街组, 渤海西部

Abstract: Based on the overall study and comparative analysis,the theory of oilfield structural analysis was used to understand the structure features and dynamic mechanism of basin formation during the deposition of the Kongdian and Shahejie formations in Western Bohai Sea,so as to reveal the distribution of source rocks in the Kongdian and Shahejie formations and guide play evaluation and exploration target selection.Basin architecture was controlled by basement structure,and tectonic deformation was different in the east and west due to the difference of crystalline basement types.In addition,the tectonic deformation was influenced by two pre-existing NE-NNE-trending and NW-NWW-trending conjugate basement faults,resulting in the E-W zonation and N-S segmentation in the west part while E-W segmentation and N-S zonation in the east part.Structure features in different deposition periods of Kongdian formation and Shahejie formation vary largely,showing an evolutionary sequence of downwarp-fault depression-fault depression and fault-downwarp depression(depression).And the structural deformation during despotism the Kongdian and Shahejie formations in western Bohai Sea was controlled by vertical extensional stress field induced by mantle diapir and uplift.Tectonic deformation in the east part was mainly controlled by the near SN extensional stress field,while that in the west part was controlled by the superimposed NW-SE and near SN extensional stress fields.

Key words: oilfield structural analysis, structure feature, dynamic mechanism, Kongdian Formation, Shahejie Formation, western Bohai Sea

中图分类号:

TE121.1

李明刚,吴景富,吴克强,等. 渤海西部孔店组—沙河街组盆地构造特征及形成动力机制[J]. 石油与天然气地质, 2013, 34(6): 781-789. doi: 10.11743/ogg20130610 Li Minggang,Wu Jingfu,Wu Keqiang,et al. Structure features and dynamic mechanism of basin formation in Kongdian-Shahejie periods in western Bohai Sea[J]. Oil & Gas Geology, 2013, 34(6): 781-789. doi: 10.11743/ogg20130610

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渤海西部孔店组—沙河街组盆地构造特征及形成动力机制

Structure features and dynamic mechanism of basin formation in Kongdian-Shahejie periods in western Bohai Sea

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