Abstract: In the course of the twenty years of development,the Daqing oil field has worked out a unique technique of producing the mufti-zones separately with success,particularly in wells of medium depth in sandstone pools.The technique is suited for producing wells in stages of no water cut,low water cut and medium water cut.It consists mainly of separate water injection of mufti-zones in the same well through a single pipe,separate oil production of mufti-zones,separate stimulation and testing of muftizones.Operators are always well aware of the amounts of water injected,oil produced,pressure and water production of the mufti-zones.Experiments are now under way to make the technique suitable for wells with high water cut.Rational application of the technique to the different stages of oil field development in the different blocks and different wells have ensured the smooth operation of the development program and stabilized the field's high yield.