Method for improving high-water-content later-stage recovery ratio of water-drive oil reservoir through pore water hammer waves

The method comprises the following steps that S1, a target well for implementing pore water hammer wave coupling water injection is selected, and basic parameters of a water injection well are determined; s2, well washing pretreatment is conducted on the target well, and the liquid absorption capacity of the reservoir is tested; s3, optimally designing pulse parameters of periodic changes of the water injection flow; s4, carrying out construction by virtue of a ground injection flow pulsation change control device; s5, tracking and testing the pressure level of the injection well and the output condition of the corresponding oil well; s6, timely adjusting the scheme according to a tracking test result, the method is suitable for the technical field of water drive reservoir development, the injected water microcosmic wave and range can be greatly increased, residual oil in secondary pores can be effectively utilized, inertial flow of fluid in the microcosmic pores can be stimulated, microcosmic seepage resista