PERFORATING GUN ASSEMBLY AND METHOD FOR ENHANCING PERFORATION DEPTH

摘要

A perforating gun assembly (110) for creating communication paths for fluidbetween a formation (114) and a cased wellbore (116) includes a housing, adetonator and a detonating cord (136).The perforating gun assembly (110)includes one or more substantially axially oriented collections of shapedcharges (122, 124, 126) each of which is operably associated with thedetonating cord (136). A perforation (152, 154) is formed in the formation(114) as a result of the interaction of jets (141, 142) formed upon thedetonation of at least two shaped charges (122, 126) that create a weakenedregion (148) in the formation (114) followed by the detonation of at least oneshaped charge (124) that forms a jet (150) that penetrated through theweakened region (148).