"Brent above $60 will keep WTI higher as they export it and replace that expensive Brent," Bob Iaccino, chief market strategist at Path Trading Partners, told CNBC's "Futures Now" on Tuesday.
American drillers have filled some of the supply gap left this year by OPEC and other oil exporters, who have cut production since January in order to drain a global glut of crude. Oil prices have been rallying on expectations that the producers will extend the deal, which is set to expire in March, through the end of 2018.
U.S. oil shipments have surged from roughly 400,000 barrels a day at the end of 2015, when the United States lifted a 40-year ban on crude exports. The trade has been fueled by a boom in U.S. oil output from shale fields, where producers use advanced drilling methods to coax fossil fuels from rock formations.