Reuters.com | OPEC Secretary General urges US shale oil producers to help cap global supply Reuters.com NEW DELHI (Reuters) - OPEC's Secretary General Mohammed Barkindo on Tuesday called on U.S. shale oil producers to help curtail global oil supply, warning extraordinary measures might be needed next year to sustain the rebalanced market in the ... Has The Bear Market In Oil Finally Ended? Oil ends higher as OPEC hints at extended output curbs OPEC says to reconvene meeting with US on deal to cut oil output |