In the process of oi field produchon, the water in the reservoir breakthrough and"channeling" phenomenon reduces the effect of oilfield development,the need for timely water shutoff, The plugging essence is to plug the high permeability layer and the high yield water layer, adjusting the flow profile reduce water production, and enhance the recovery rato As plugging agent polyacrylamide has different impacts on filtration abilities of oi and water. less on oil and more on water. In appication it can be used without cross Hinking or cross-inked to gel in combination with aluminm, chromic so ts ox zirconium salts etc or added some resins to become interpenetrating polymer network [IPN] with higher temperature resistance, IPN plugging ogent cross-Inked by wjO style PAM katex and modified amno resin has aready been widely appled in ol field plugging ond gotten obvious effects. PAM con be used in adjusting injection profile and blocking ba holes, too and shows promising effects in proctice

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