The re-balancing of oversupplied oil markets is on track as demand climbs and U.S. shale production falters, according to the International Energy Agency. The world will face a 560,000 barrel-a-day supply deficit in 2017 if OPEC members pump at the same rate as this year, IEA data show. If Iran and Iraq add just some of the new capacity they’re planning, Libya recoups a fraction of the supplies lost to political conflict and Nigeria restarts oil fields halted by militant attacks, there’ll be an 810,000 barrel-a-day excess — a fourth year of oversupply.