Brent was up $1.13, or 0.9%, to $120.94 a barrel, WTI gained $1.03, or 0.9%, to $118.62.

Prince Abdulaziz bin Salman met Deputy Prime Minister Alexander Novak on Thursday at the St. Petersburg International Economic Forum, a flagship conference that almost all Western officials and business executives are avoiding this year following Russia’s invasion of Ukraine.

In the worst-case scenario where the Nord Stream pipeline to Germany is shut totally, Europe will fail to reach storage levels the European Union has ordered by the start of the heating season in November. And the region could run out of stocks completely by January.

Brent were down 45 cents, or 0.4%, to $118.06 a barrel , WTI fell 44 cents to $114.87, also off 0.4%.

"We see that we have a fairly significant increase in June compared to May, up around 600,000 b/d," Novak said on the sidelines of the St Petersburg International Economic Forum,

Compared to pre-war levels in January and February, Russia's shipped crude exports from June 1-15 rose by 576,000 b/d to average about 3.88 million b/d,

Brent were down $1.27, or 1%, at $119.90 a barrel, WTI fell $1.44, or 1.2%, to $117.49 a barrel.

The decline in overall export volumes is mainly due to lower oil-product flows, while Russian crude shipped in May grew nearly by 500,000 barrels a day compared to the start of the year, mainly thanks to higher deliveries to Asia.

Brent rose $1.05, or 0.9%, to $123.32 a barrel, WTI rose 96 cents, or 0.8% to $121.89 a barrel.

Brent was down $1.86, or 1.5%, to $120.15 a barrel, WTI was down $2.15, or 1.8%, at $118.52.