This came after oil prices fell sharply Wednesday after data showed U.S. crude-oil inventories rose for a 10th straight week. An oil field near Bakersfield. Photo: lucy nicholson/Reuters Oil-market participants continued to look to a crucial gathering next week in Vienna of the Organization of the Petroleum Exporting Countries and its production allies, led by Russia. Pressure is mounting on the producers to engineer another production cut to rein in excess supply and bolster prices. OPEC and its partners meet in Vienna starting Dec. 6.