Optimization Model of Horizontal Wells with ICD Water Control Completion in Bottom Water Reservoirs

Abstract

When the heterogeneous bottom water reservoirs are developed by horizontal wells, the fingering of the bottom water always results in water breakthrough too early. With ICD water control completion, the bottom water can rise uniformly. The key of this approach is to select suitable ICD equipment. Therefore, aiming for inflowing uniformly from horizontal well to wellbore, optimization model of horizontal wells with ICD water control completion in bottom water reservoirs was established according to the law of equivalent percolation resistance and with the consideration of the coupling of seepage in near-wellbore area, ICD equipment and flow within the wellbore. Then, suppose the well is produced at a constant fluid rate, a flowchart of ICD optimization design is presented taking nozzle type of ICD for example and makes some experimental calculations. The results show that the model is reliable and practical, and the optimized ICD water control completion can make the horizontal well produce fluid uniformly and bottom water rise uniformly and therefore increased cumulative oil production and enhanced oil recovery. The model provides the theory base and design flowchart for horizontal wells with ICD water control completion in bottom water reservoirs. It also can guild for the actual production of oilfield.