Black commodities traded mixed in early trading this week, showing both benchmarks remain strong above the $ 70 a barrel price level.
Brent crude futures strengthened in the Asian session, rising to around $ 76 a barrel. Meanwhile, US WTI traded higher at $ 73.10 a barrel.
Easing concerns over the Omicron variant put both black gold trades at four-week highs.
Last week, preliminary findings from the UK Health Agency found that Omicron was less likely to cause serious illness than its previous dominant variant, Delta.
However, the highly contagious variant has led to an increase in the number of Covid-19 cases worldwide, particularly in Europe.
This prompted several countries in the UK such as Scotland, Wales and Northern Ireland to tighten sanctions over the weekend. This factor may be able to restrain oil prices from rising higher.
In addition, the rise in natural gas prices, which hit a record high last week due to supply constraints, also supported Brent crude oil trading.