板桥凹陷新生代断裂构造特征与成藏模式

为了揭示板桥凹陷新生代断裂构造特征与油气成藏的关系，利用油区构造解析方法对新生代断裂构造活动及 控藏机理进行研究。结果表明，板桥凹陷可划分为北区断裂构造转换带、中区断鼻构造带以及南区走滑变形带等3 个 构造区带，区内主控断层具有垂向分期、平面分段的活动特征，并派生出大量次级断层，组成了新生代断裂构造活动的 全貌。综合断层活动与断裂输导体系以及凹陷内油气分布特征，建立了“同生断层深浅层兼控”与“次级断层浅层伴生 控藏”两种断控成藏模式。

Cenozoic Fault Structure and Hydrocarbon Accumulation#br# Model in the Banqiao Sag

In order to reveal the relationship between the Cenozoic fault structure and hydrocarbon accumulation of Banqiao sag，the fault activity and their reservoir-controlling mechanism are systematically researched using the oilfield structural analysis method. The results show that the sag can be divided into three structural zones：the faulted tectonic transfer belt in the north，the faulted nose belt in the central and strike-slip deformation belt in the south. The master faults exhibiting geological periods vertically and segments horizontally，generate a lot of secondary faults. The fault activities at all levels formed the panorama of Cenozoic fault structure. Based on comprehensive research of fault activity and carrier systems，as well as the hydrocarbon distribution，two different models of migration and accumulation are established，which are“deep and shallow accumulation in contemporaneous faults”and“shallow accumulation in secondary faults”respectively.