BEIJING, Sept 14 : Oil prices rose more than $3 at market open on Monday, after new strikes on Saudi Arabia and on ships in the Gulf on Sunday. Brent crude futures rose $3.62, or 3.46 per cent, to $108.23 per barrel as of 22:14 GMT (Sunday). WTI futures rose $3.15, or 3.15 per cent, to $103.20 per barrel.