Cyclic waterflooding is a kind of waterflood technique,which can improve the waterflood efficiency in low-permeability and fracture-porosity reservoir by changing periodically injected water volume.

• 周期注水是通过周期性地改变注入水量来改善低渗油藏和裂缝孔隙性油藏水驱开发效果的一项技术。