Risk control is very important because gunshock and/or debris problems can lead to multimillion dollar losses in non-productive time, and in extreme cases, gunshock problems can lead to lost wells. Safety and cost reduction are extremely important in deepwater operations. Perforating all zones simultaneously in one trip saves time and reduces risks when compared with stacked completions requiring multiple trips for each zone. Perforating several intervals in a single run is required to complement single-trip multizone systems. Under these conditions, the challenges are to create sufficiently large entrance holes in the casing, minimize the high-risk of equipment damage due to gunshock, and minimize the amount of perforating debris created. The main difficulty in perforating these wells is the high-pressure environment (~20,000 psi).

These wells are completed with single-trip multizone systems, and they have gross perforated lengths exceeding 1,500 ft. Many large wells have been drilled in the Gulf of Mexico's Lower Tertiary play.

System shock 1 weapons