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.
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 jump in oil prices mostly reflects the market jitters as unrest escalates in Kazakhstan and the political situation in Libya continues to deteriorate and sideline oil output," Rystad Energy analyst Louise Dickson said in emailed comments.
