The Study on the Bottom Water Reservoir Water Cut Rising Characteristics——Take the Northwest Block of Y2 Reservoir as an Example

The northwest block of Y2 reservoir is a bottom water reservoir,Its exploitation effect is very poor.The study on the water cut rising characteristic have an important role for improving the development of the reservoir effect.It fund that the actual water rising velocity is far outweigh the relative permeability calculation theory water cut up speed,through the contrast with the actual water cut curve and relative permeability calculation theoretic water cut curve.The single well water cut curve is mainly for convex.According to the change of yield and water cut,the single well water cut curve is divided into three types to discusse.And the reason of each type is analyzed.Finally,on the basis of the analysis of the single well water cut up,the reason of the water cut of the reservoir as a whole to be a step-like is analyzed.The reservoir bottom water coning is serious.The remaining oil is mainly concentrated between the injection-production patterns.Therefore,the horizontal well technology for tapping potentialities of the reservoir can be considered.