Oil prices rose by more than $2 on Wednesday on signs of tighter supply, a weaker dollar and optimism over a Chinese demand recovery. But the likelihood that Opec+ will leave output unchanged at its upcoming meeting limited the gains. Brent crude futures rose $2.34, or 2.82 per cent to $85.37 per barrel by 1455 GMT. The more active February Brent crude contract rose by 3.04pc to $86.81.