Crude cargoes are set to drop this month as Opec members close in on their goal for oil output cuts, two cargo tracking firms say.

The data underscore comments from Euronav chief Paddy Rodgers who sees Opec cuts among the factors contributing to a "difficult rate environment for 2017."

Geneva-based Petro-Logistics estimates that Opec producers have cut output some 900,000 barrels per day for January.