牛居油田牛12断块精细构造研究

Fine structure Research of Niu 12 Fault block in Niuju Oilfield

精细构造研究是油藏描述的重要组成内容 ,它主要是利用多种手段和方法重新认识和建立油藏的三维构造形态和特征 .牛居油田牛 1 2断块平面上是一个近东西向延伸的 ,南、北和西三面均为断层遮挡 ,一面开口的长条型断块 .区域构造应力场控制了该断块的构造面貌特征 ,形成的多期、多组断裂彼此相互叠加、相互改造和相互影响 ,总体上表现为断块内以四级断层为主 ,断层的主要活动时期为沙一段 -东营组 ,活动强度较弱 。

The results of the fine structure research show that, Niu12 fault block is a strip fault block stretching in east west orientation, and it is kept out by faults on the north, south and west. The structural feature of the fault block is controlled by regional tectonic stress field, and the formation of Niuju oilfield is influenced and controlled by faults. In the fault block, fourth rank faults are dominant, and the main activity period is the forming stage of Shayi member to Dongying group. The activity is weak. The structural features of the fault block have developing and inheriting characteristics.