介绍了侧钻井扩孔施工工艺，探讨了用扩孔技术减少侧钻井油层损害的机理。
The paper introduces the reaming technology of lateral drilling, discusses the mechanism of reducing reservoir damage by using reaming technique.
指出了在油层改造过程中可能引起油层损害的因素，针对这些因素提出了相应的改善方案。
The factors which may cause reservoir damage during modifying are pointed out, and corresponding improving plans are proposed accordingly.
试验表明，该堵剂对水层有较好的堵塞效果，不损害油层和油永混合层。
The test results showed that this agent had a good plugging effect for water layer and no damage for oil layer and oil-water mixed layer.
目前的3种压裂液对葡萄花油层污染均较为严重，田菁胶、香豆胶、瓜胶压裂液对岩心渗透率损害率分别为27.89%，18.51%，26.06%。
These 3 kinds of fracturing fluids may seriously contaminate Putaohua reservoir. The damage rate of sesbania gum, fenugreek gum and guar gum were 27.89%, 18.51%, 26.06% respectively.
渗透率越低，孔喉半径越小，油层压力越低，越容易产生水锁损害，且越难以解除其损害。
The lower the permeability and the smaller the pore-throat radius as well as the lower the reservoir pressure, the easier the formation of water locking damage, and it is difficult to be removed.
渗透率越低，孔喉半径越小，油层压力越低，越容易产生水锁损害，且越难以解除其损害。
The lower the permeability and the smaller the pore-throat radius as well as the lower the reservoir pressure, the easier the formation of water locking damage, and it is difficult to be removed.
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