孤北洼陷桩南断裂带构造特征及其对油气的控制

桩南断裂带位于孤北洼陷内部,对两侧的边界断裂起着继承与连接的作用.受区域右旋走滑作用影响,在本区形成了典型的走滑拉张构造,并且在构造演化过程中始终处于连接两侧边界构造带的位置,是油气运聚的有利区域.为探索该区油气成藏规律,利用地质、测井、地震和生产动态等资料,通过分析构造分区和油气分区,首次提出桩南断裂带的分段特征及其形成机制,同时重点剖析油藏沿构造变形区的有序排列规律,明确了桩南断裂带分段性对油气成藏的控制作用,总结了本区构造与油气分布的关系,指出了油气聚集的有利区域,为下一步勘探指明了方向.

Structural feature and its control on oil and gas of Zhuangnan fault zone in Gubei Sag

Zhuangnan fault zone is located in Gubei Sag which has played an important role in inheriting and connection on both sides of the boundary faults.Influenced by right lateral strike slip,a typical strike-slip extensional structure is formed in this area.Zhuangnan fault zone always connects the boundary faults on both sides,which is favorable area of hydrocarbon migration and accumulation.In order to find out the law of hydrocarbon accumulation,we start by geologic,logging and seismic data and dynamic production data,first proposing the segregative characteristics of Zhuangnan fault zone and its formation mechanism through the analysis of structural subregions and hydrocarbon distribution.Meanwhile,more analyses have been done for the oil reservoirs formed mainly along the region of structural deformation order.This research defines the control action of structural subregions during the formation of hydrocarbon accumulations,summarizes the relationship between structural feature of Zhuangnan fault zone and oil and gas,and points out the favorable area of hydrocarbon migration and accumulation,and the direction for further exploration.