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 52 cents, or 0.63%, to $82.51 a barrel at 0721 GMT, after a 1.5% jump in the previous session. U.S. West Texas Intermediate (WTI) crude futures rose 57 cents, or 0.72%, to $80.03 a barrel, extending a 2.1% gain in the previous session. Brent and WTI were on track for a more than 6% gain in the first week of the year, with prices at their highest since late November, as supply concerns overtook worries that the rapid spread of the Omicron coronavirus variant might hurt demand. “The upward […]