Oil prices fell for a third day straight on Wednesday on growing expectations that supply growth will outpace demand growth next year.
Governments around the world, including most recently Britain and Norway, have tightened restrictions to stop the spread of the Omicron variant.
Both benchmarks posted gains of about 8% last week.
Oil prices dipped on Friday but were still on track to their biggest weekly gain since late August.
The situation with oil prices has not demonstrated stability over the past 4 months.
Over the past week, world oil quotations have experienced serious volatility.
In particular, the volume of transportation to Kremenchuk increased by 13.4% at the end of the year.