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注水开发油田在长期注水之后，不可避免地产生一部分无效注水，本文运用理论推导和实际资料相结合的方法，引入了“有效注采比”的概念，通过对一个油田（或单元）无效注水比例的测算，确定出在不同压力保持水平、不同采液速度下的注采比及在合理压力保持水平、合理采液速度下的合理注采比，为油田进行合理的配产配注提供理论依据。
After long-term waterflooding, some ineffective waterflooding is inevitable. In this paper, the concept of “effective injection-production ratio” is introduced through the combination of theoretical derivation and actual data. By injecting water into a single field (or unit) , Determine the injection-production ratio at different pressure maintenance levels and different liquid production rates and the reasonable injection-production ratio at a reasonable pressure maintenance level and reasonable liquid production rate to provide a theoretical basis for rational allocation of oil production in the oilfield .