The European benchmark Brent crude advanced on Friday session and was about to record a weekly gain amid the supply disruption in Libya continues as most of the oil fields are still halted and as a rebel group in Nigeria claim another attack on Forcados pipeline. Brent for delivery in May added 22 cents to $108.05 per barrel and it gained 1.1% this week, however in the Q1 the Brent is down 2.5%.