Brent fell 62 cents, or 0.7%, to $84.66 a barrel, WTI was down 51 cents, or 0.6%, at $79.35 a barrel.

The OPEC+ Joint Ministerial Monitoring Committee, on which Mazrouei sits, is co-chaired by Saudi energy minister Prince Abdulaziz bin Salman and Russian Deputy Prime Minister Alexander Novak.

Brent had fallen 33 cents, or 0.4%, to $83.70 a barrel, WTI slipped 20 cents, or 0.3%, to $78.19.

WTI slipped by 54 cents, or 0.72%, to $74.58 a barrel, Brent fell by 50 cents, or 0.62%, to $79.60.

LNG deliveries to Europe have helped ease an energy crisis this winter after Russian piped supply slumped.

Brent were up $1.49, or 1.9%, at $80.06 a barrel, WTI rose $1.43, or 1.9%, to $75.20.

Dutch front-month futures, the European benchmark, rose 4.3% to €72.50 a megawatt-hour at 8:55 a.m. in Amsterdam. The UK equivalent contract was 7.1% higher.

Brent was up $1.63, or 2.1%, to $79.47 a barrel, WTI gained $1.41, or 1.9%, to $74.25.

Russia said Dec. 28 it will ban crude supplies to countries that observe the G7's $60/b price cap from Feb. 1 for five months. The retaliatory move, which applies at all stages of supply to the final buyer, had been widely flagged by Russia and expected by the global oil market.

Dutch front-month futures, the European gas benchmark traded 2% higher at to €66.30 per megawatt-hour by 12 p.m. in Amsterdam. The UK equivalent contract also rose. German power for next month increased 2.3% to €166 per megawatt-hour.