Productivity of selectively perforated vertical wells

This study presents analytical models to predict the productivity of selectively perforated vertical wells. The models consider arbitrary phasing angle, nonuniform perforation size and length, and formation damage around perforations. The accuracy of the models was verified against the results from the experimental studies, the semi-analytical correlation, and the numerical models all available in the literature. Unique applications of the models are presented. A comprehensive sensitivity study showing the impact of different perforation schemes on well productivity is documented.