Water-oil-ratio (WOR) forecasting is a method to predict oil production based upon water production trending. A plot of the WOR or Water Cut versus Cumulative Production is the most broadly used technique to evaluate and predict waterflood performance. However, the use of this approach is only possible when a straight line can approximate the functions, allowing us to estimate the recoverable hydrocarbon volumes, commonly expressed as a recovery factor. Kraken can create cross plot graphs, which allows the user to confront parameters and evaluate how they are correlated.