Concern about global oil demand and OPEC+ production cuts are now part of the oil price landscape and few expect any surprises coming from these directions. There is, however, a wild card: U.S. shale production. CNBC this week quoted an analyst from Macro-Advisory, who included U.S. shale production growth prospects on a list of three factors to watch when it comes to prices. “The big uncertainty this year — and it is already beginning to be talked about — is: Can or will U.S. producers be able to continue to add as much extra…