LONDON—Oil prices edged up on Monday as supply disruptions in Kazakhstan and Libya offset worries stemming from the rapid global rise in Omicron infections. Brent crude rose 19 cents, or 0.2 percent, to $81.94 a barrel at 1006 GMT, and U.S. West Texas Intermediate (WTI) crude was up 20 cents, or 0.3 percent, at $79.10 a barrel. Oil prices gained 5 percent last week after protests in Kazakhstan disrupted train lines and hit production at the country’s top oilfield Tengiz, while pipeline maintenance in Libya pushed production down to 729,000 barrels per day from a high of 1.3 million bpd last year. Kazakhstan’s largest oil venture Tengizchevroil (TCO) is gradually increasing production to reach normal rates at the Tengiz field after protests limited output there in recent days, operator Chevron said on Sunday. “The tailwind lent to oil prices by supply concerns should therefore abate, which suggests that prices will …