Method for testing rheological property of oil displacement polymer in porous medium

The invention belongs to the technical field of oil-gas field development, and particularly relates to a method for testing the rheological property of an oil displacement polymer in a porous medium. The method comprises the following steps: selecting a porous medium and putting the porous medium into a porous medium holder; newtonian fluid is put into the filter cup, the fluid in the filter cup passes through the porous medium by changing the injection pressure gradient, the change relation between the flow and the pressure gradient is monitored, the relation curve equation of the pressure gradient and the flow of the fluid is fitted, and the permeability of the porous medium is obtained; putting a polymer solution to be measured into the filter cup, enabling the polymer solution in the filter cup to pass through the porous medium by changing the injection pressure gradient, monitoring the change relation of the flow and the pressure gradient, and fitting to obtain a relation curve equation of the pressure g