3 Min Read LONDON (Reuters) - The oil market is likely to be in balance in the second half of 2021, even though European coronavirus lockdowns and U.S. winter storms caused disruptions in March, crude and petroleum products market price structures showed. FILE PHOTO: Crude oil storage tanks are seen from above at the Cushing oil hub, in Cushing, Oklahoma, March 24, 2016. REUTERS/Nick Oxford/File Photo After sharp declines of oil inventories this year, the pace of destocking slowed in recent weeks, prompting OPEC and its allies, a group known as OPEC+, to lower its 2021 demand growth forecast by 300,000 barrels per day (bpd). The group now sees demand rising by 5.6 million bpd.