Productivity of selectively perforated horizontal wells

A general 3D analytical inflow-performance-ratio (IPR), model was used to investigate selective-perforating effects. on horizontal-well, performance. The investigation showed that the ratio of total perforated length to the drilled well length was the most dominant. parameter controlling the long-term performance of the selectively perforated horizontal wells. The other important parameters were the degree of formation and perforating damage.