Derivation and application of new water flooding relation

This paper is based on Buckley-Leverett theory of linear displacement and Welge average water saturation equation. A new water flooding characteristic curve is derived and the characteristic of monotonicity is analyzed. Explaining how to select the reasonable starting point for linear regression to improve the accuracy of the predictive recoverable reserves and ultimate recovery. The new water flooding characteristic curve can be used to forecast the geological reserves for oilfields. The examples prove that the new type of water flooding characteristic curve can predict the dynamic of future development for the oilfields effectively and has a certain practicality for the forecast of indexes for oil production and development.