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注水系统效率由电机平均运行效率、注水泵平均运行效率和管网运行平均效率组成。为提高注水系统效率，首先应选用高效的电机和注水泵，对注水量小注水压力高的小采油区宜选用柱塞泵。在资金不足的情况下，采取减少泵的口环间隙、提高流道的表面光洁度、用不锈钢新叶轮取代旧叶轮和减级数等技术改造措施，可使泵效提高2．4％。为了提高管网运行平均效率，应尽量缩小注水半径、使泵的排量与实际注水量合理匹配、改造和更新管网、定期彻底清洗注水井。
Water injection system efficiency by the average operating efficiency of the motor, water pump average operating efficiency and pipe network running average efficiency. To improve the efficiency of water injection system, the first choice should be efficient motor and water injection pump, the small amount of water injection of small injection pressure of small oil extraction area should use the plunger pump. In the case of lack of funds, to reduce the pump mouth ring clearance to improve the surface finish of the runway, with a new stainless steel impeller to replace the old impeller and the reduction of the number of technical transformation measures, can make the pump efficiency increased by 2.4%. In order to improve the average efficiency of pipe network operation, should minimize the water injection radius, the pump displacement and the actual amount of water to match a reasonable match, transform and update the pipe network, regular thorough cleaning of injection wells.