Oil heads for best week since mid-Dec, Kazakhstan unrest stokes supply worries.
Oil prices edged up on Friday, heading for their biggest weekly gains since mid-December, fuelled by supply worries amid escalating unrest in Kazakhstan and outages in Libya.
Brent crude futures climbed 57 cents, or 0.7%, to $82.56 a barrel at 0403 GMT, after a 1.5% jump in the previous session. U.S. West Texas Intermediate (WTI) crude futures rose 67 cents, or 0.84%, to $80.13 a barrel, extending a 2.1% gain in the previous session.
