Abstract: After studying Shengtuo Oilfield,which has been developed by water-flood for 36 years,and which has been become into high water cut stage,the dynamical geologic process of development liquid was brought forward.The geologic environment,the power source,the fashion and the types of the process are discussed.The process controls mechanism that causes the changes of macroscopic and microcosmic reservoir parameters.Due to the long period of water-flooding development,the process can take place chronically.Under the process,the parameters of reservoir between different stage of water cut change regularly.The process also controls the mode and distribution of remaining oil.This new concept is very important to the adjustment,rooting potential work and tertiary recovery for high water cut reservoir.