Low permeability reservoirs have poor physical properties and strong heterogeneity. The conventional continuous waterflooding method can not effectively be used to inject into the formation and an effective driving energy system is difficult to establish. In order to better supplement energy in the region and further enhance the development extent of the reserve, the reservoir simulation method is used with the rectangle five point method for injection of vertical wells as the elementary unit and the production of horizontal wells as a comparative analysis of production levels of different injection styles, different injection periods,and the corresponding injection-production ratio combined with the actual field model to forecast the development efficiency. The result shows that with the working system of symmetrical cyclic waterflooding, and with the water injection well being open for a month then shut for a month, the injection-production ratio is 1.4. The formation pressure alternates smoothly with slowly rising water cut with a good efficiency of supplying the formation energy. The optimized development and production plan might provide some guidance for the oilfields.

low permeability  /  fractured horizontal wells  /  cyclic waterflooding  /  numerical simulation  /  recovery percent  /  injectionproduction ratio