Application of Numerical Simulation by Stages in Remaining Oil Research for Mian 4 Block of Bamianhe Oilfield

There are a heavy oil reservoir developed by water flooding,which is in the extra high water cut phase,the remaining oil distributed discontinue,which impact the development emotion.To describe the remaining oil distribute character accurately,the method of multi-stages simulation technique for dif- ferent development phase model was used in the research of the mian 4 block of the Bamianhe oilfield.The result of the research approved:the result of the multi-stages simulation for different phase accord with the real condition.This can provide a advantage idea for following development.