There is a lack of uniformity and standardization of the existing optimal injection allocation method. Therefore

three key parameters involved in the optimization of water injection well allocation

which are longitudinal splitting coefficient

plane splitting coefficient and injection-production ratio

are taking as the breakthrough point. And then

the research on the allocation optimization of injection wells by the scholars at home and abroad is summarized. Finally

the calculation method of injection well allocation suitable for differ

ent occasions is obtained. On this basis

a new idea of optimizing injection allocation for water injection wells is proposed with the oil production wells as the center. This new idea emphasizes that for the optimal injection allocation of the water injection wells

the optimal injection parameter calculation method should be selected according to different geological reservoir characteristics

oilfield development stages

injection accuracy and other factors

so that to make the oilfield optimized water injection effect best. After this method is applied to the field test

a good development effect is achieved with a daily oil increase of up to 10 %（daily oil increase of 20 m

3

） in the block. In general

the optimization of water injection direction in the future must be the integration of reservoir and oil production engineering with the water injection scheme design

intelligent optimization and synchronous adjustment are the core based on artificial intelligence. The proposed optimized injection well allocation method has guiding significance for the water injection work of different types of oilfields at different stages of development.