Relevance. In case of stationary water injection to maintain reservoir pressure, a surplus irrigation of producing wells is observed. Premature watering is associated with high heterogeneity of reservoirs, high oil viscosity, bottom water and intensive water injection. The use of cyclical flooding allows increasing formation coverage of the impact and the current oil recovery rate. The increase in oil production from the use of the method reaches 4 %; water withdrawal from the reservoir is reduced. The aim of the research is to investigate the efficiency of using cyclic flooding on deposits with high-viscosity oil, assess the most effective duration of the periods of operation and shutdown of injection and production wells to achieve the greatest gains in oil production. Object: the area of carbonate reservoir with high-viscosity oil. The average water content of wells in the reservoir is 77,1 %, with 49 % oil recovery. The site is operated by one injection well located in the center and nine producing wells along the perimeter of the oil-water contact. In the conditions under consideration, it is necessary to introduce methods to increase the coverage of the paste and reduce water content. Methods: determination of optimal technologies for cyclic water injection and complex non-stationary effects, hydrodynamic modeling of cyclic effects on a section of an oil field. Results. The authors have considered various options for injection well operation with implementation of cyclic flooding. It was obtained that the ratio of work duration and well shutdown, provided 100 % compensation, does not practically affect the simulation result. During the cyclical operation of the injection well, the increase in oil production occurs by 3,6 % compared with the base case. Greater technological effect is possible with a complex effect – periodic shutdown of both injection and production wells. In the case of a complex effect, the cumulative oil production at the reservoir site increases by 10,6 % compared with the base case.