The price of Kuwaiti oil went up USD 1.11 to USD 46.21 per barrel on Wednesday after being at USD 45.10 pb the day before, said Kuwait Petroleum Corporation (KPC) Thursday. 
At the global level, the price of crude oil went up over the USD 50 pb margin due to the continuous retreat of the Nigerian oil production and the decrease of American crude reserves, according to (KUNA) news agency. 
The Brent mix went up by USD 1.07 to reach USD 52.51 per barrel, the same case with the American crude which went up by 87 cents to reach USD 51.23 pb.