The Productivity-Enhancing Technique of Deep Penetrating Perforation With a High-Pressure Water Jet

Deep penetrating perforation with a high-pressure water jet is an emerging advanced technique for enhancing oil well productivity because of its high cutting, breaking, and cleaning capabilities. Based on the analysis of productivity impairment caused by drilling fluid invaded zone and conventional charge perforating compacted zone, production-enhancing mechanisms of deep penetration perforating with a high-pressure water jet have been comprehensively investigated. The three major aspects are rock cutting with a high-pressure and high-velocity water jet, relieving the stress concentration of the near-wellbore region, and penetrating through the damaged zone. In addition, the feasibility of improving formation fracturing and acidizing treatment by using this technique is also discussed, along with future development and application.