Oil prices slumped 3% on Monday.
Surging cases of the Omicron coronavirus variant raised fears new curbs may hit fuel demand.
Oil prices fell for a third day straight on Wednesday on growing expectations that supply growth will outpace demand growth next year.
Oil prices dipped on Friday but were still on track to their biggest weekly gain since late August.
On Tuesday, Brent price increased by 0.5% to $82.43 per barrel.
Royal Dutch Shell said on Thursday it plans to shift its Shell Rheinland refinery at Wesseling in Germany away from crude oil and towards low or zero carbon products from 2025.
The decline in coal consumption slowed down but did not stop.
Over the past week, world oil quotations have experienced serious volatility.