关键词: 低渗透油藏 , 中等偏强水敏 , 注水开发 , 防膨剂 , 悬浮物 ,  , 储层保护

Abstract: Research of reservoir protection technology for low permeability and medium to strong water sensitivity oil reservoir：Taking Qiang 1 block in Liaohe oilfield as an example. Reservoir property of qiang 1 block is poor，belongs to the low porosity, low to ultralow permeability reservoir and high content of clay,water sensitivity of it is medium to strong.Reservoir protection measures for waterflooding in these reservoir was particularly critical. In view of this, the related critical value parameters was identified in all kinds of wokingfluid injected, as the same time, the studies of anti swelling agent selection and injected water quality were carried out, which choice anti swelling effect of 12 kinds of anti swelling agent in use of centrifugal method and Xray diffraction method,and further optimize injection mode and injection concentration. The result shows that 6#antiswelling agent effect is good, the scene can be injected high concentration(1%) slug, after can be continuously injected antiswelling agent in concentration of 0.5%, Finally, qiang1 block is successfully impled of wate injection development, injection pressure of the block is stable, and the block reached requirement of daily injection allocation volume.

Key words: Low permeability,    , Low permeability and medium to strong water sensitivity,    ,  Waterflooding,    , Anti swelling agent,    ,  Suspended solids,    ,  Reservoir protection technology