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针对松辽盆地长岭断陷的构造特征进行分析,阐述了长岭断陷的构造发育史。长岭断陷经过了裂谷、断陷、坳陷等不同的演化阶段,地质结构比较复杂,断裂发育。由于断层形态、断层组合方式不同而表现出复杂多样的构造样式,主要有伸展构造样式、挤压构造样式、走滑构造样式等3种类型。圈闭类型主要有背斜型圈闭、断鼻—断块型圈闭、地层圈闭和构造—岩性圈闭。长岭断陷主要受伸展构造样式控制,以断鼻、断块构造为主,该类圈闭多具有近源、断裂沟通烃源、纵向上多层圈闭继承发育的特点,成藏条件优越。
According to the tectonic characteristics of the Changling fault depression in the Songliao Basin, the tectonic history of the Changling Fault Depression is expounded. Changling fault depression after rifting, faulting, depression and other different stages of evolution, the geological structure is more complex, fracture development. Due to the different fault types and fault combinations, complex and diverse tectonic styles are shown. There are three types of extensional tectonic styles, extrusion tectonic styles and strike-slip tectonic styles. The main types of traps include anticline traps, broken nose - fault block traps, formation traps and tectonic-lithological traps. The Changling Fault Depression is mainly controlled by extensional tectonics and is dominated by broken nose and fault block structure. Most of these traps have hydrocarbon source close to source and fault, and have multi-layer traps inherited and developed longitudinally with favorable reservoir forming conditions .