|
Well area , La 8-182 G Ⅱ 1 ~ 183 reservoir flooded large thickness , high degree of flooding , and different areas of the flooded situation is quite different . Reservoir layers , and flat contradictions exist between layers , and the impact of factors well network deployment and injection-production system is imperfect , resulting in La 8-182 well area G II 1 183 reservoirs spread to the extent of the injected water varied there is still a considerable proportion of the remaining oil exists . La 8-182 Wells District G Ⅱ 1 ~ 183 reservoir characteristics , a detailed understanding of the geological conditions of the block , the application Petrel geological modeling software , phased plus rock - controlled two-step modeling idea to establish La 8-182 3D geological model of the well area , FloGrid pre - processing module processing required to generate Eclipse software model , the application of the Eclipse software to carry out a numerical simulation study . A fine history matching based on mainly analyze the reasons for the formation of the distribution characteristics of remaining oil and remaining oil . For polymer injection well area , La 8-182 polymer injection initial specifications for the concentration of 1200mg / L , molecular weight of 9.5 million , lower values of recovery efficiency , the main causes of the remaining oil . Different injection concentration , molecular weight, the injection speed , the development period layers recovery degree and ultimate recovery . Relative molecular mass of the main analysis , adjust the timing , injection concentration utilized for different types of reservoir conditions . Combination of different molecular weight and different injection concentration and injection pressure relationship , the problems in the development process of polymer injection , put forward a corresponding adjustment programs , including the concentration adjustment molecular weight adjustment stratified injection volume adjustment , development indicators forecast small layer analysis adjusted disposable status, given reasonable adjustment programs .
|