Dual characteristic of sequence structures and forming mechanism in compressional abdominal area of Junggar Basin
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摘要: 在对野外露头、综合录井、地震资料、层序地层学分析研究的基础上，认为准噶尔盆地层序构型与传统层序模型强调的“三元体系域”不同，具有典型的“二元体系域”特征（低位粗碎屑体系域和湖扩超覆细碎屑体系域），结合准噶尔盆地构造演化及沉积充填过程，认为多幕逆冲挤压和松弛后稳定沉降相互耦合的作用过程是构成“二元体系域”的主要机制，形成过程可以划分为平静期、活动期和萎缩期3个阶段。在此基础上，建立了盆地斜列型砂体预测模型和削截尖灭型砂体预测模型。
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关键词:
- 准噶尔盆地 体系域 层序地层学 形成机理
Abstract: According the outcrop description、lithological analysis and seismic interpretation，its suggested that the sequence framework of Junggar Basin is the typical “dual” characteristic which is consisted of lowstand system track and lake transgressive system tractCombining with the process of structural evolution and sedimentary filling，its proved that the coupling between multiphasic thrust extrusion and steady deposition after extrusion should be responsible for dual system tracks and the process can be divided into three periods：calm period，active period and shrinking periodMoreover，the two predictive models are established which are the echelon type and truncationpinchout type sand body. -
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