Vogel’s dimensionless IPR curve is frequently utilized to predict the inflow performance of oil wells. While Vogel’s curve was developed for wells having a flow efficiency of one, i.e. a skin factor of zero, this fact is often ignored even when a well has a flow efficiency not equal to one. It has been widely documented that this usually results in serious over or under-prediction of a well’s inflow performance. This paper points out additional errors that may occur when using Vogel's dimensionless IPR curve to predict the inflow performance of an oil well. It demonstrates how the careful selection of the flowing bottom-hole pressure and resultant single stabilized flow rate will result in more accurate IPR curve prediction. A new, simple approach for predicting future IPR curves is also presented.

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