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建立了低渗透应力敏感油藏压裂直井产能计算的分区模型,该模型内区为压裂改善区,外区为未改善区,本模型可用来预测井底改造后油井的产能,实例计算表明:内区和外区的渗透率变形系数都对产能有很大的影响;随着内区和外区渗透率的增加,产能逐渐增加,当内区渗透率增加到一定数值后,产能变化不大;内区半径越大,产能越高;随着外区启动压力的增加,产能逐渐减小。
The partition model of productivity calculation of fractured vertical wells in low-permeability and stress-sensitive reservoirs has been established. The inner area of the model is a fracturing amelioration area and the outer area is an unaffected area. This model can be used to predict the productivity of a well after the bottom hole reconstruction. : Both the permeability coefficient of the inner zone and the outer zone have a great influence on the productivity. With the increase of the permeability in the inner zone and the outer zone, the capacity increases gradually. When the permeability in the inner zone increases to a certain value, the production capacity does not change The larger the inner radius, the higher the production capacity. With the increase of starting pressure in the outer zone, the capacity decreases.