(This story removes reference in paragraphs 1 and 4 to OPEC discussions being triggered by Trump’s tweet)

FILE PHOTO: A flag with the Organization of the Petroleum Exporting Countries (OPEC) logo is seen during a meeting of OPEC and non-OPEC producing countries in Vienna, Austria September 22, 2017. REUTERS/Leonhard Foeger/File Photo

ST PETERSBURG/DUBAI (Reuters) - Saudi Arabia and Russia are discussing raising OPEC and non-OPEC oil production by some 1 million barrels a day, sources said, weeks after U.S. President Donald Trump complained about artificially high prices.

Riyadh and Moscow are prepared to ease output cuts to calm consumer worries about supply adequacy, their energy ministers said on Friday, with Saudi Arabia’s Khalid al-Falih adding that any such move would be gradual so as not to shock the market.

Raising production would ease 17 months of strict supply curbs amid concerns that a price rally has gone too far, with oil having hit its highest since late 2014 at $80.50 a barrel this month.

Trump tweeted last month that OPEC had “artificially” boosted oil prices.

“We were in the meeting in Jeddah, when we read the tweet,” OPEC Secretary General Mohammad Barkindo said, referring to a meeting in Saudi Arabia on April 20.

“I think I was prodded by his excellency Khalid Al-Falih that probably there was a need for us to respond. We in OPEC always pride ourselves as friends of the United States,” Barkindo told a panel with the Saudi and Russian energy ministers in St. Petersburg at Russia’s main economic forum.

OPEC officials said by “the need to respond” Barkindo was referring to a tweet he sent the same day, rather than the need to act.

The Organization of the Petroleum Exporting Countries and allies led by Russia have agreed to curb output by about 1.8 million barrels per day (bpd) through 2018 to reduce global stocks, but the inventory overhang is now near OPEC’s target.

In April, pact participants cut production by 52 percent more than required, with falling output from crisis-hit Venezuela helping OPEC deliver a bigger reduction than intended.

Sources familiar with the matter said an increase of about 1 million bpd would lower compliance to 100 percent of the agreed level.

Barkindo also said it was not unusual for the United States to put pressure on OPEC as some U.S. energy secretaries had asked the producer group to help lower prices in the past.

Oil prices fell more than 2 percent toward $77 a barrel on Friday as Saudi Arabia and Russia said they were ready to ease supply curbs.

NEAR TARGET

Russian Energy Minister Alexander Novak said current cuts were in reality 2.7 million bpd due to a drop in Venezuelan production - somewhere around 1 million bpd higher than the initially agreed reductions.

Novak declined to say, however, whether OPEC and Russia would decide to boost output by 1 million bpd at their next meeting in June.

“The moment is coming when we should consider assessing ways to exit the deal very seriously and gradually ease quotas on output cuts,” Novak said in televised comments.

Initial talks are being led by the energy ministers of OPEC kingpin Saudi Arabia and Russia at St. Petersburg this week along with their counterpart from the United Arab Emirates, which holds the OPEC presidency this year, the sources said.

OPEC and non-OPEC ministers meet in Vienna on June 22-23, and the final decision will be taken there.

Current discussions are aimed at relaxing record-high compliance with the production cuts, the sources said, in an effort to cool the market after oil hit $80 a barrel on concerns over a supply shortage.

China has also raised concerns about whether enough oil is being pumped, according to a Saudi statement issued after Energy Minister Falih called China’s energy chief on Friday to discuss cooperation between their countries and to review the oil market.

Nur Bekri, administrator of China’s National Energy Administration, told Falih he hopes Saudi Arabia “can take further substantial actions to guarantee adequate supply” in the crude oil market, the Saudi Energy Ministry statement said.

While Russia and OPEC benefit from higher oil prices, up almost 20 percent since the end of last year, their voluntary output cuts have opened the door to other producers, such as the U.S. shale sector, to ramp up production and gain market share.

The final production number is not set yet as dividing up the extra barrels among deal participants could be tricky, the sources said.

“The talks now are to bring compliance down to the 100 percent level, more for OPEC rather than for non-OPEC,” one source said.

RALLY CONCERNS

OPEC may decide to raise oil output as soon as June due to worries over Iranian and Venezuelan supply and after Washington raised concerns the oil rally was going too far, OPEC and oil industry sources told Reuters on Tuesday.

However, it is unclear which countries have the capacity to raise output and fill any supply gap other than Gulf oil producers, led by Saudi Arabia, and Russia, the sources said.

“Only a few members have the capability to increase production, so implementation will be complicated,” one OPEC source said.

So far, OPEC had said it saw no need to ease output restrictions despite concerns among consuming nations that the price rally could undermine demand.

The rapid decline in oil inventories and worries about supplies after the U.S. decision to withdraw from the international nuclear deal with Iran, as well as Venezuela’s collapsing output, were behind the change in OPEC’s thinking.