Intermittent water flooding and oil production applied in channel sandstone reservoirs during early water flooding

Channel sandstone reservoirs are small reservoirs with edge water, and have a strong heterogeneity both vertically and horizontally. Elastic drive is a common way in production. Water flooding is necessary during late production period because that formation pressure is insufficient. Conventional continuous flooding works well during early period; however, water breakthrough often takes place. The effect of cyclic water flooding during late period is poor. We propose a new method named "intermittent water flooding and oil production". When water is injected, oil wells stop producing until formation pressure is high enough. And then, water injection stops, and oil production goes on.