CAJ | 학술논문

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。
위료게시공점조-사하가조경원암층계적분포특정，지도발해서부구대평개화목표우선，재정체연구화대비분석적기출상，운용유구구조해석이론，대발해서부공점조-사하가조침적시기분지적구조특정진행료분석，병대기형성동력궤제작료탐토。연구인위，분지결구수기저구조공제，대응불동류형적결정기저，구조변형동서분구，동시수도NE-NNE향화NW-NWW향량조공액선존기저단렬작용，서구구유동서분대、남북분괴적특점，이동구칙구유남북분대、동서분괴적특점；공점조-사하가조불동침적시기분지구조특정차이교대，총체표현출요단-단함-단요（요함）적연화서렬특정；지만저벽유도적여지만륭기축향수직적인장응력장공제료발해서부공점조-사하가조침적시기적구조변형，기중동구적구조변형주요수근SN향인장응력장공제，서구칙총체존재NW-SE향화근SN향량개인장응력장첩가적구조배경。
Based on the overall study and comparative analysis ,the theory of oilfield structural analysis was used to under-stand the structure features and dynamic mechanism of basin formation during the deposition of the Kongdian and Shahe -jie formations in Western Bohai Sea ,so as to reveal the distribution of source rocks in the Kongdian and Shahejie forma-tions 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 addi-tion,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 depres-sion(depression).And the structural deformation during despotism the Kongdian and Shahejie formations in western Bo -hai 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 .