Producing an oilfield in a cost-effective way depends on how long water production could be delayed in the reservoir. Many flow mechanisms, correlations, and methods to calculate maximum water-free oil production rate have been published, However, those methods have generally failed to not consider the skin effect which affects the flow into the wellbore. In this paper, the semi-analytical perforation skin model as presented by Karakas and Tariq is incorporated into the Meyer and Garder correlation for critical oil rate from a perforated vertical well interval to obtain the maximum water-free oil production rate and optimal perforation parameters. The resulting coupled computational model is used to determine the sensitivity of the maximum water-free oil production rate to wellbore perforation parameters. Whilst an increase in perforation length and decrease in spacing between perforation increase the critical flow rate, an increase in perforation radius did not translate to higher productivity. The optimal perforation angles are 45° and 60°, however, for the data used in this work the maximum water-free oil rate of 23.2 std/d was obtained at 45° of phasing angle, 1 in of spacing between perforation, 0.36 in of perforation radius and 48 in of perforation length. Thus, the perforation strategy can be optimized prior to drilling and completion operations to improve productivity using the computational model presented in this work.

以经济有效的方式生产油田取决于储层中的水生产可能延迟多长时间。已经公开了许多计算最大无水采油率的流动机理，相关性和方法，但是，这些方法通常都没有考虑到影响流入井眼的趋肤效应。在本文中，将Karakas和Tariq提出的半解析射孔蒙皮模型并入Meyer和Garder的相关关系中，以从一个穿孔的垂直井间隔获得临界油率，以获得最大的无水采油率和最佳的射孔参数。所得的耦合计算模型用于确定最大无水采油率对井眼射孔参数的敏感性。射孔长度的增加和射孔间距的减小会增加临界流速，而射孔半径的增加并不能提高生产率。最佳射孔角为45°和60°，但是，对于这项工作中使用的数据，在相移角为45°，射孔间距为1英寸，射孔间距为0.36英寸时，最大无水油率为23.2 std / d。射孔半径的48英寸和射孔长度的48英寸。因此，可以使用本工作中介绍的计算模型在钻探和完井作业之前优化射孔策略，以提高生产率。对于这项工作中使用的数据，在相角为45°，射孔间距为1 in，射孔半径为0.36 in和射孔长度为48 in的情况下，最大无水油率为23.2 std / d。因此，可以使用本工作中介绍的计算模型在钻探和完井作业之前优化射孔策略，以提高生产率。对于这项工作中使用的数据，在相角为45°，射孔间距为1 in，射孔半径为0.36 in和射孔长度为48 in的情况下，最大无水油率为23.2 std / d。因此，可以使用本工作中介绍的计算模型在钻探和完井作业之前优化射孔策略，以提高生产率。