Oil prices edged up on Wednesday morning after three straight days of declines, with market sources citing a decline in U.S. crude inventories, while investor concerns about Russia sanctions and a potential OPEC+ output increase capped gains. Brent crude futures rose 20 cents, or 0.31%, to $64.60 a barrel at 0203 GMT. U.S. West Texas Intermediate crude futures rose 18 cents, or 0.3%, to $60.33.