准噶尔盆地西北缘乌夏断裂带二叠系油气成藏组合

The distribution regularity and master control agency of the Permian oil play in the Wuxia fracture belt in Wuxia fracture belt,Zhunge'er Basin

根据乌夏断裂带的构造与沉积演化、烃源岩和原油地球化学特征,以油源分析、油气藏类型分布和生、储、盖组合特征与匹配关系,将乌夏断裂带二叠系油气成藏组合分为源内成藏组合(下部成藏组合、中部成藏组合)和源外成藏组合(上部成藏组合),并根据层位、储盖组合和圈闭特征分为10类次级油气成藏组合,各油气成藏组合具有不同的油气成藏特征.构造演化和沉积中心不断发生迁移造成的生、储、盖层发育差异,控制着乌夏断裂带油气成藏组合的发育及分布,指出源内油气成藏组合主要分布在夏子街背斜区及乌尔禾断褶带下盘斜坡区,源外油气成藏组合则在夏子街双断展背斜带前部和乌尔禾断褶带沿一级断裂发育.

According to the structural evolution,sedimentary evolution,oil resource comparison,reservoir type and distribution,the combination of oil source,reservoir and capping formation's basic characteristic,the Permian hydrocarbon reservoir are divided into two oil play(inner and outer oil plays) in Wuerhe-Xiazijie fracture zone in northern-western marginal of Zhunge'er Basin.Further the oil plays can be divided into ten types according to the stratigraphic position,reservoir and capping formation composition and trap character.Each oil play has different reservoir characters.The oil source rock,reservoir and capping formation development change cause the inner source rock oil play to distribute at the front end of the first structural belt of the Wuerhe zone of bruchfalten and Xiazijie anticline zone.The outer source rock oil play alone distribute the first order fault in the Wuerhe fracture belt and the front end of the Xiazijie double fault anticilinal belt.