Christopher Sell / Bloomberg
OPEC’s Nov. 30 output agreement to cut production by 1.2 million barrels a day may have put a floor under the oil price, but has also awakened U.S. shale. Exploration and production companies have added 77 rigs this year to Feb. 24, according to the latest figures from Baker Hughes, while U.S shale production is forecast to reach about 4.87 million barrels a day in March, according to the Energy Information Administration's latest Drilling Productivity Report. That's the highest since May 2016. Estimates of just how much shale will be added over this year range from as high as 900,000 barrels a day by Macquarie and Rystad Energy to a more modest 400,000 barrels a day by JP Morgan Asset Management.