Study On Effective Fracturing Of Water Injection Well In Yushulin Low Permeability Oilfield

In extra-low permeability oilfield, the pressure of injection well very high because of the reservoir physical property not good and the porosity & pore throat very narrow. It will be very difficult for injection development of the oilfield, if the pressure of wellhead reach or exceed the critical pressure of surface line. Recently a few years, Yushulin oilfield carried out fracturing of injection well. But it was very bad that the effect of water injection well stimulation.Considering the historical fracturing data and fracturing characteristic of Yushulin oilfield, according to fracturing mechanism of injection well stimulation in extra-low permeability oilfield, analysis control factors of fracturing of injection well for water injection well stimulation and incremental oil, and point out the technological direction of injection well fracturing. Through the research of reasonable parameter and field experiment, analysis critically limit of injection well fracturing, and finish feasibility analysis of Yushulin oilfield of injection well fracturing and optimum feasible program.Through research of integral fracturing, obtain the rule of production decline after fracturing. And confirm the method of injection fracturing and potential. Above research results, it is will be very helpful for injection well fracturing in Yushulin oilfield.