Abstract: This paper introduces the laboratory study and field application of a profile correction agent of PAB - 2 type that is composed of polymer, cross- linker and strengthening agent It can be injected into profile correction wells by using the injection facilities of polymer flooding and can generate gel of high strength with a viscosity of 105 mPa ?s at in situ temperature. The gelling time is adjustable from 1 d to 20 d according to needs and the gel can keep for one year without viscosity break at a temperature up to 90· Water plugging rate reaches 99. 8% in core experiments. Profile correction operations with this agent are carried out in 13 injectors in Shuanghe oilfield achieving a maximum profile correction radius of 36 m and an average water adsorption profile improvement of 53. 7%.