Abstract: At the present，QL complex faulted-block reservoir has come to the producing stage with middle to high water cut.There is more complicated remaining oil distribution.The geological model of flow units is set up based on sedimentary facies belts，lithologic，physical properties，heterogeneity，structure and the shape of sand body distribution by firstly considered the static parameters （geologic factors） infelicity the remaining oil distribution，the flow units are reasonably and accurately delimited.The water displaying oil characteristic and flood out pattern in different flow units are studied by combing dynamic and static data，the distribution law of oil，gas and water after flooding out is re-recognized.On the basis of that，the distributing law of remedies oil in different flow units is studied and the favorable regions for enhancing recovery are figured out，remarkable results are achieved.Chancing remains oil recovery in the complex faulted-block reservoirs in high water cut stage can take the method as reference.

Key words: complex faulted-block reservoir, flow unit, flood out pattern, remaining oil distribution, oil-water flooding characteristic