Oil prices rose for a second day on Friday, set for their third weekly gain, on uncertainty about the future of supply from Venezuela and as Iranian unrest increases concerns about output there. Brent futures rose 44 cents, or 0.71%, to $62.43 per barrel at 0203 GMT, while U.S. West Texas Intermediate (WTI) crude gained 39 cents, or 0.68%, to $58.15.