1. A method of monitoring performance of wells, comprising: for a particular producer well, dynamically calculating, by a processor, allocation factors with respect to plural respective well patterns each comprising a corresponding injector well, wherein the allocation factors represent production characteristics of the particular producer well in the respective well patterns, wherein each of the allocation factors is calculated based on a product of a corresponding injection rate and a natural logarithm of a ratio of a distance between the particular producer well and a corresponding injector well to a corresponding injector well radius.