Dyeing assistant RG, a cationic compound, has at least two reactive groups which are sensitive to active hydrogen.

助染剂RG是一种阳荷性的化合物。它至少含有两个能与活泼氢发生作用的活性基因。

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A modified cationic polyhydroxy compound gelling fluid as water shutoff is developed. This type of gel has better selectivity. Its field tests are described and the results are satisfactory.

介绍了一种利用阳离子化改性多羟基化合物进行堵水调剖的方法，具有一定的选择性，在油田应用取得了良好效果。

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