Profile control method for immobile string of injection well

The invention relates to a profile control method for an immobile string of an injection well. The method comprises the following steps: firstly fishing up the water faucet of the injection well and injecting clear water and a high-viscosity temporary plugging agent into a pit shaft for preprocessing the pit shaft; then sequentially injecting gel particles, inorganic gel and weak gel into an oil pipe to perform the profile control and controlling the sizes of the diameters of the gel particles to guarantee that the gel particles can pass through the water faucet; and finally adopting a high-efficiency gel breaker to wash the pit shaft to reduce the viscosity of the high-viscosity temporary plugging agent, back washing the high-viscosity temporary plugging agent out of the pit shaft, and completing the profile control operation for the immobile string of the injection well. The method is easy to operate, time-saving and labor-saving.