| By the end of 2013, the numbers of the polymer flooding experimental zone in Daqing oil field keep growing and the blocks which have already completed the process of polymer injection is more. More blocks will be applied polymer flooding technology in the future;however the problem of tapping after polymer flooding becomes the hot point research in Daqing oilfield at present. In order to study delicate potential tapping measures of water flooding after polymer flooding which to get the measures that can improve the oil recovery ratio. This passage is aimed at studying the numerical simulation of delicate potential tapping by water flooding measures which after polymer flooding in east of Xing1-2 in Daqing oil field.According to the related basic data of target block and use a geological modeling software called Petrel, establish the structure model 、 Sedimentary microfacies model and phase control property model of the target blocks; put the geological model which get from Petrel into Eclipse,Combine with the dynamic history data of water flooding and match with it.According to the dynamic production data of oil and water wells, the profile test data of hygroscopic and fluid production, numerical reservoir simulation technology(the areal map of remaining oil) and so on, analysis these data comprehensively. The selection of the potential area in the target block which water flooding regime was adjusted, mainly including subdivided water injection potential area, potential area of fracture and water plugging.The purpose layers need to be subdivided flooding(stop high permeability), fracturing,water plugging and water flooding regime, cyclic water flooding measures. The results of effect evaluation show that: the max degree of reserve recovery is at adjustment phase in the injection production system, 7.30%, final water content value is 98.46%, the minimum, the maximum cumulative production 47300 tons. Therefore, we recommend to injection production system adjustment is the best scheme. |
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