Prices were swinging back after dropping nearly $2 on Tuesday as talks in the West Asia helped ease supply worries Oil prices rose on Wednesday after an attack on a refinery in Saudi ​Arabia, the world's biggest crude exporter, renewed ​concerns around the risks to supply in the West Asia stemming from the conflict with Iran and its proxies. Brent crude futures rose $1.48, or 1.3%, to $115.36 a barrel as of 0140 GMT.