流体绕流减少低效无效循环的做法和效果

Method and effects of Reducing Inefficient or Ineffective Cycle by Fluid Rounded Flowing

大庆油田进入特高含水期,经过长期注水开发,由于注入水的冲刷,在部分储层内油水井之间形成了优势渗流通道,油井含水高,驱油效率低。为了扩大注水波及体积、控制低效无效循环,选取典型井组,通过优化注入强度、降低高含水井生产压差,使驱替流体在大孔道方向形成绕流,从而改变液流方向,驱替其它部位剩余油。方案实施后,创造经济效益220.97万元。

Dading Oilfield has entered in the ultra-high water cut stage.Through a long period of water flooding development and because of injection water flushing,dominant percolation paths between the oil well and the water well in some reservoirs are formed,which results in high water-cut and low oil displacement efficiency.In order to expand injection-water swept volume and control inefficient or ineffective cycle,typical well groups are chosen.Through optimizing injection strength and reducing producing pressure differential of high water cut wells,the displacement fluid becomes rounded flowing along with the direction of the pore passage,and the flow direction can be changed to displacement remaining oil in other zones.The operation of the method creates economic benefits of 220.97 million yuan.