Study on the effect of well land transition zone on the performance of polymeric oil repellents
The apparent viscosity,rheology,resistance and residual resistance coefficients,microstructure and hydrodynamic radius of polymer solution after shearing by well transition zone shear simulation experi-ment device were investigated with hydrophobic polymer AP-P4 under different water absorption strength conditions.The results showed that the polymer AP-P4 solution lost up to 61.4%of viscosity and reduced more than 40.0%of its ability to build up the drag and residual drag coefficients with the increase of wa-ter absorption strength after shearing by the well ground transition zone,but the reduction of its ability to build up the residual drag coefficient was smaller than the reduction of its ability to build up the drag co-efficient.The lower the energy storage modulus and loss modulus of the polymer solution,the more severe-ly the microstructure is disrupted,and the smaller the hydrodynamic radius.
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