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Multi-fractured horizontal wells is widely applied in unconventional oil and gas reservoirs,especially in low-perm and ultra low-perm reservoirs.During water injection process,water breakthrough along hydraulic fracture can easily lead to serious water channeling,therefore affect development result and reduce the ultimate recovery factor.Meanwhile it’s unclear for the regulation on water breakthrough in separate fracture and the injection-production adjustment is relatively blind.In order to delay the time of water breakthrough and enhance ultimate oil recovery,combined with tracer simulation technology,based on the five spot mixed well patterns of vertical and horizontal wells,the productivity evaluation and water breakthrough regulation for each separate fracture was studied in different fracture shapes and various distributions of different sedimentary facies derived from certain oil field in this paper.Results show that the contribution to productivity and water breakthrough risk of separate fractures is different in different development stages.On the basis of separate productivity,breakthrough orders and water out direction of different fractures in various distributions of sedimentary facies,the real time importance degree and risk of breakthrough for separate fracture is evaluated,in order to provide significance for injection-production adjustment and profile control by water plugging in oil field.