Performance evaluation of weak gel profile control agent in sewage in Gudao Oilfield

In this paper, a series of laboratory tests were done on different kinds of field polymer and composite organic chrome crosslinker TIORCO WC684 imported from the U. S. in Gudao oilfield. The results showed that the initial viscosity and intensity of Baomo polymer was better than others. The intensity evaluation of Baomo polymer was done, the concentration of crosslinker was 30~1 000 mg/L, and the concentration of polymer was 2 500~3 000 mg/L in the major slug of weak gel. In that case, the intensity of gel was high and hard to dewater. The concentration of crosslinker was 300~600 g/L, and the concentration of polymer was 4 000 mg/L in the finished slug of weak gel, in that case, the intensity of gel was high and reached the requirement. Meanwhile salt-tolerance of the finished slug was appraised and the result showed that the intensity of system increased with the increase of salinity.