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周期注水是水驱开发油田改善开发效果的一种水动力学方法。结合双河油田Ⅳ４层系地质特征分析了周期注水试验效果及开发特点。５口注水井进行矿场实验：单元日产油最高增加２１ｔ，综合含水最低下降２个百分点。周期注水井对应受效油井的年产油量比常规水驱增加 ６０２７ｔ，年含水上升率比试验前下降 １个百分点。
Periodic waterflooding is a hydrodynamic method that improves the development of waterflooding fields. Combined with the geological characteristics of Ⅳ4 strata in Shuanghe Oilfield, the effect of periodic waterflooding test and its development characteristics were analyzed. 5 mouth water injection wells for field experiments: unit maximum increase of 21t daily oil production, integrated water decreased by 2 percentage points minimum. The annual output of oil wells corresponding to the affected injection wells increases by 6027t compared with the conventional waterflooding, and the annual water cut-off rate decreases by 1% compared with that before the test.