Hand-out/Shell Offshore Inc. The ability to produce oil from ultra-high pressure wells, known as 20k, has opened the door for the region's three top producers to progress several new projects in the US Gulf of Mexico.The US offshore region provides a good chunk of high-margin oil production, with a relatively low carbon footprint, for majors BP, Chevron and Shell.But the US Gulf's aggregate output is likely to peak soon, putting pressure on the industry to find and develop new resources in frontier deepwater plays. Save for later Print Download Share The Issue