The Optimization Research Of Alternating Polymer Injection Technology Parameter In Sub-layers Reservoir

The polymer flooding blocks of the first type reservoir in Sabei development area have been in the late period of polymer injection and subsequent water flooding stage,and the second type reservoir become stable and improve the efficiency of polymer flooding reservoir in the main direction.Compared with the first type reservoir,the second reservoir has a" thin,low,narrow,poor" feature,so at layer and interlayer contradictions is outstanding,and plane phase change complex.Because the two reservoir heterogeneity is serious,polymer in high permeability layers breaks through,and polymer of the low permeability layers is very few.Polymer cannot be continued to play a role,so it influences the effect of polymer flooding.Therefore,we proposed the way of alternating injection exploitation of second reservoir,to continue to perfect the efficient development model of the second reservoir polymer flooding,and to maximize the recovery.Based on the study of the geological modeling,through reservoir numerical simulation method to optimization of alternating polymer flooding injection parameters,it optimizes the alternating cycle,alternating viscosity and injection strength,the polymer injection time to stop,then forecasts the development indexes,and studies the Variable regulation of the dynamic parameter of alternating polymer injection.