【Key words】 highwatercut reservoir； tract profile control； weak gel； modifying and flooding agent； profile modification agent； field test；
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Profile modification agent SZX was composed of sludge produced during waste - water reinjection as main agents and quantitative additives.
SZX调剖剂是将油田污水回注处理过程中产生的水处理淤泥作主剂，加入一定量添加剂组成。
Appling advantageous property of modified starch, the strong gels water plugging and profile modification agent for medium-low temperature reservoirs is developed.
利用改性淀粉的优越性能，开发出了一种适用于中、低温油藏的改性淀粉强凝胶堵水调剖剂。
Oil Wells after a profile modification of construction, conventional water shutoff used large plugging agent and the effect is not obvious.
油水井在进行了多次调剖堵水作业之后，常规的调剖堵水作业的堵剂使用量大而且增产效果不明显。
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