盘河断块区构造及微构造特征

Characteristics of Structure and Micro-structure in Panhe Fault-block

以地质力学理论为基础 ,综合应用地震、测井、油田动态等资料 ,对盘河断块区构造及微构造特征进行了系统研究。该断块区属于典型的复杂断块构造 ,经过不同时期应力场的复合与联合形成了棋盘格式断裂体系 ,5条三级断层贯穿全区 ,内部还发育多条四、五级断层。由于断层发育 ,断块破碎 ,形成反向屋脊式断块油藏 ,断块内构造高部位多分布在西南方向。在区域构造控制下 ,受沉积环境、差异压实作用、古地形等因素的影响 ,形成正向 (小高点、小鼻状等 )、负向 (低点、凹槽等 )、斜面微构造特征 ,不同类型微构造对油水运动规律及剩余油分布有一定的控制作用 ,正向微构造剩余油相对富集。应用研究成果 ,调整注采结构 ,在正向微构造高点及构造高部位剩余油区实施打调整井等措施 。

Based on Geo mechanics theory and combined with seismic,well logging,geological and oil development data,structure and micro structure in Panhe fault block are revealed.It is proved that Panhe fault block is a typical complex fault block,which is a grid fracture system by a series of union and composition of geological stress field.As a result,there are a lot of faults that make the fault block small and fault distance various.Set with formations,they form leaf like structure,high area of which are located in the south part of the fault block that control the distribution of oil and water.Micro structure that developed with the regional structure controls the distribution of remaining oil.There are a lot of remaining oil at the high part of the micro structure.