桥东油田新生代构造演化对油气成藏影响

The impact of Cenozoic structural evolution on hydrocarbon accumulation in the Qiaodong oilfield

在明确桥东油田构造发育特征的基础上,利用平衡剖面技术对其新生代构造演化过程进行了恢复,明确了构造演化对桥东油田油气成藏的控制作用。桥东油田处于一个由5条北西向主断层及一系列次级断层组成的复杂断裂构造带上,5条主断层表现出由北向南逐渐迁移的活动特征,控制了本区的构造与地层发育特征,对青南生烃洼陷的形成、储盖组合的发育、圈闭的形成以及油气的运聚成藏均具有重要的控制作用。

Based on analysis of the tectonic feature of the Qiaodong oilfield,the process of Cenozoic structural evolution has been restored with balanced cross section technique,thus made clear the control action of structural evolution on hydrocarbon accumulation in this oilfield.The Qiaodong oilfield lies on a complex faulted structure composed of 5 main faults of NW strike and a series of secondary faults.The 5 main faults show characteristics of gradual moving from north to south,had controlled the structure and strata development in this area,as well as the formation of the Qingnan hydrocarbon generation sag,reservoir-seal assemblage,traps,and hydrocarbon migration and accumulation.