Some OPEC members are considering the idea of suspending Russia in an oil production deal as Western sanctions hurt the nation’s ability to produce more, the Wall Street Journal reported on May 31, citing OPEC delegates.

Exempting Russia could pave the way for Saudi Arabia, the United Arab Emirates (UAE) and other OPEC members to produce more to meet the production targets.

Oil prices have soared to above $100/bbl since the Russian invasion of Ukraine and countries including the U.S. have urged a hike in production to bring prices down.

Oil prices turned negative on May 31 after the report was published that some producers were exploring the idea of suspending Russia’s participation in the OPEC+ production deal.

While there was no formal push for OPEC to pump more oil to make up for any potential Russian shortfall, some Gulf members had begun planning for an output increase sometime in the next few months, the Wall Street Journal reported, citing OPEC delegates.

Brent crude futures for August, the most actively traded contract, settled down $2, or 1.7%, at $115.60 a barrel, after rising to $120.80 earlier in the day. The front-month contract LCOc1 for July, which expired on Tuesday, closed up $1.17, or 1%, at $122.84.

WTI crude in the U.S. settled at $114.67/bbl, down 40 cents or 0.4% from close on May 27. Earlier in the session, it had touched $119.98, its highest since March 9. There was no settlement on the U.S. Memorial Day holiday on May 30.

“The suspension of Russia from OPEC plus could be a precursor to Saudi Arabia and the United Arab Emirates utilizing their spare production capacity, because they would feel that they no longer have a production quota agreement that needs to recognize Russia’s interest,” said Andrew Lipow of Lipow Oil Associates in Houston.

OPEC and allies led by Russia, collectively known as OPEC+, have been unwinding record output cuts in place since the COVID-19 pandemic took hold in 2020. Under a deal reached in July last year, the group was set to increase output targets by 432,000 barrels per day every month until the end of September.

However, Russian crude output in April fell by nearly 9% from the previous month, an internal OPEC+ report showed this month.

Despite the late reversal in direction in the session, both benchmarks ended May higher, marking the sixth straight month of gains. They have risen more than 70% over the period.

The premium of August-loading Brent contracts over a six-month spread LCOc2-LCOc8 hit a nine-week high at close to $15 a barrel, indicating current supply tightness.

Prices were supported most of the session after the European Union agreed to a partial and phased ban on Russian oil, China decided to lift some COVID-19 restrictions and the U.S. summer driving season kicked off.

EU leaders agreed in principle to cut 90% of oil imports from Russia, the bloc’s toughest sanction yet on Moscow since the invasion of Ukraine three months ago.

Once fully adopted, sanctions on crude will be phased in over six months and on refined products over eight months. The embargo exempts pipeline oil from Russia as a concession to Hungary.

U.S. crude oil production rose in March by more than 3% to 11.7 million bbl/d, its the highest since November, according to the government. However, output has been slow to recover from the impact of the coronavirus pandemic and is still far below its record high of 12.3 million bbl/d in 2019.

Oil prices found further support as Shanghai announced an end to its COVID-19 lockdown, and will allow people in China’s largest city to leave their homes and drive their cars from June 1.

U.S. retail gasoline prices also touched a record national average of $4.622 a gallon, according to AAA gas prices data as Memorial Day weekend marked the official start of the summer driving season.