【摘要】 通过对三维地震资料的解释可知,雅克拉断凸中的晚第三纪张扭性断裂系统具有东西分块、南北分带的基本特征,主要发育4种断裂构造样式:阶梯状断裂构造、掀斜断块构造、堑垒式构造和负花状构造。与张扭性断裂系统有关的圈闭构造样式主要有4种:断鼻与断背斜、掀斜断块、逆牵引背斜和地垒。张扭断裂系统主要活动期为晚第三纪吉迪克期和康村期,其形成的圈闭与生烃期有较好的匹配关系。雅克拉断凸张扭性断裂系统在白垩系和第三系油气聚集过程中,断裂的垂向运移通道作用表现得极为明显,但是断层的侧向封堵对油气的聚集成藏也起到了至关重要的作用。更多还原

【Abstract】 Through interpretation of 3D seismic data,the extensional-shear fault system in the Neogene in Yakela fault block has two main features of blocks distributed along east-west and zones distributed along north-south,which develops four fault structural styles,including stepladder fault structure,tilted fault block structure,graben-horst block structure and negative flower shaped structure.There are four trap structural styles associated with extensional-shear fault system,namely fault nose and faulted anticline,tilted fault block,reverse drag anticline and horst.The traps formed by the extensional-shear faults,whose main active period are Suwiyi-Jidike epoch of neogene,well match the periods of hydrocarbon formation reservoirs.The hydrocarbon vertical migration along the extensional-shear fault appears clearly in the process of hydrocarbon accumulation in Cretaceous and Tertiary,but lateral sealing of the extensional-shear fault is vital in the process of pools of petroleum accumulation.更多还原