перфорация с ограниченным доступом для ГРП(Limited-entry strategy means choosing the perforation diameter and the number of perforations in every zone to create a certain pressure differential across the perforations, so that anticipated injection flow rate produces sufficient flow rate and fracture net pressure through each perforation to adequately stimulate every zone. Kenny Gray)
перфорационные каналы("Solids-carrying fluids or drilling mud must be removed from the perforation channels and the formation face to allow a proper dehydration process and complete fill-up." – Well Cementing, edited by E.B. Nelson, 1990 ART Vancouver)