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

摘要： 强1块本身储层物性差,属于低孔、低灢特低渗储层,粘土含量高,水敏表现为中等偏强。对于这种低渗区块进行注水开发时,储层的保护措施尤其关键。针对上述特点,确定各种工作液注入时相关临界值参数,同时开展防膨剂优选和注入水质的研究,采用离心法和X衍射法筛选了12种防膨剂的防膨效果,并进一步优化防膨剂的注入方式和注入浓度。结果表明,6# 防膨剂效果好,现场可以先期采用注入质量分数为1%段塞,之后采用防膨剂质量分数为0.5%连续注入;从而实现该块自实施注水以来,注水压力稳定,且达到日配注量的要求,成功实施注水开发。

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