It was to be a vastly bold undertaking on the frigid Gulf of Ob, in Russia’s Far North, a steppingstone in Moscow’s rising ambitions to be an influence in liquefied pure fuel a lot as it’s in oil and fuel delivered by pipeline.

When President Vladimir V. Putin of Russia launched his struggle on Ukraine, the $21 billion undertaking often known as Arctic LNG 2 was effectively underway with dozens of wells drilled, an airport constructed and a lot of the tools ordered.

Now, although, European Union sanctions that prohibit the sale of fuel liquefaction tools to Russia have thrown the enormous advanced into doubt. The sanctions imply, at finest, that simply one in every of three deliberate liquefaction amenities at Arctic LNG is more likely to be accomplished anytime quickly, analysts say.

The undertaking’s key worldwide backer, TotalEnergies, not too long ago wrote off its $4.1 billion funding. It’s “tough to imagine that it may be constructed with the sanctions,” Patrick Pouyanne, the TotalEnergies chief government, advised analysts in late April.

The issues go far past L.N.G.

In coming years Russia is more likely to be pressured into retreat throughout a large spectrum of vitality. Future progress for its oil and fuel exports — for many years the spine of the nation’s financial system — are actually deeply unsure. The shock waves from Ukraine even lengthen into nuclear energy, the place Finland not too long ago shelved a deal for Russia to construct an estimated 7 billion euro ($7.4 billion) reactor.

“Russia goes to be a drastically diminished worldwide participant, there is no such thing as a query about it,” mentioned Matt Sagers, vice chairman and head of Russian and Caspian vitality at S & P International, a monetary providers agency.

Russia will in all probability discover markets for at the least a few of its oil and fuel; in April Mr. Putin mentioned that whereas the nation might lose conventional patrons, it might discover extra at house and overseas. However it could regularly lose affect within the trade, changing into a pariah to former worldwide companions like the most important worldwide oil corporations.

Some analysts additionally say it’s arduous to see how Moscow can stay a co-chair, with Saudi Arabia, of the oil producers’ group often known as OPEC Plus. Up to now, although, Saudi officers and others are sticking with Russia with an eye toward preserving cohesion within the group for a distant future date when the world is oversupplied with oil relatively than nervous about shortages.

L.N.G. is successfully a proxy for Russia’s vitality ambitions. It’s fast-growing, largely as a result of the chilled liquid may be transported all over the world on ships, permitting a rustic like Russia, whose fuel is now delivered largely by pipelines to more and more hostile prospects in Europe, to succeed in any market with an appropriate terminal. Dealing with the chilled fuel can also be technically difficult.

L.N.G. continues to be in its infancy in Russia, however Moscow aimed to vie with world leaders: Qatar, Australia and america. It could capitalize on its monumental fuel sources and its relationships with Exxon Mobil and Shell in addition to TotalEnergies, which owned 10 p.c of Arctic LNG 2. All are huge gamers in liquefied fuel. (L.N.G. imports have been rising at about 7 p.c per yr.)

Such ambitions have now been dashed. Analysts at S & P International now estimate that Russia will possible have solely half the L.N.G. fuel capability it was focusing on by the top of the last decade. An Exxon Mobil liquefied fuel undertaking on Sakhalin Island, in Russia’s Far East, has been shelved, and Shell has mentioned it might exit Russia’s first L.N.G. facility, additionally on Sakhalin Island.

In oil and fuel, the setbacks may be divided into two broad classes. With worldwide oil giants like Shell, BP and Exxon Mobil having introduced their intention to go away Russia, the Russian trade will lose entry to superior applied sciences and capital. For instance, Russia’s fuel large Gazprom has been working with Shell on utilizing chemical mixes to spice up oil extraction in a undertaking known as Salym, which Shell is now exiting.

Up to now, Russia’s huge fields have usually been straightforward to faucet, however after a long time of pumping, the remaining petroleum will likely be more durable to extract. “The longer Russia is shunned from the system, the better the draw back threat for manufacturing,” Oswald Clint, an analyst at Bernstein, a analysis agency, wrote in a latest report.

However a extra rapid concern is the truth that Russia has been pressured to close down oil manufacturing due to the sanctions and the reluctance of patrons to deal with Russian crude and oil merchandise.

In a single signal of such misery, the oil undertaking operated by Exxon Mobil on Sakhalin Island within the Russian Far East shipped no oil in April, in accordance with Kpler, a agency that tracks vitality delivery. Exxon Mobil declared power majeure at Sakhalin, that means it may not carry out its obligations due to circumstances exterior of the corporate’s management. Exxon mentioned that it was having issue “complying with its obligations” and “conducting operations on the required degree of worldwide requirements.”

Russia doesn’t have a big oil storage system, and so when it’s unable to export oil, it’s pressured to throttle again wells or utterly shut them down. There’s nowhere to place the oil. Russian oil output declined by 900,000 barrels a day, or 10 p.c, in April in contrast with March. The Worldwide Vitality Company, the Paris-based group, mentioned not too long ago that the quantity of decreased manufacturing may method 3 million barrels a day later this yr.

And in an indication that extra faucets could also be closed, analysts at Kayrros, a analysis agency, mentioned that oil on tankers has been growing quickly. This implies “Russia would possibly once more be discovering it harder to eliminate its crude,” they mentioned.

Russia has had some success find patrons for oil that in any other case might need gone to Europe and america. Flows to India have ramped up. Viktor Katona, an analyst at Kpler, mentioned that China, the place vitality consumption has fallen off because of Covid lockdowns, seems to be stepping up its shopping for.

Russia can also be being profitable, due to excessive petroleum costs. Analysts at S & P International estimate that Russia made about $26 billion on gross sales of pure fuel to Europe from the start of the struggle in Ukraine on Feb. 24 by way of the top of April, greater than 3 times the interval a yr earlier. Of this whole, a few quarter went on to the federal government and about half went to Gazprom, the fuel monopoly. Round $5 billion went to Asian and Western L.N.G. buyers. (Tax exemptions meant to encourage L.N.G. funding imply the chilled fuel now produces little income for the Russian authorities.)

Analysts say it might be unsuitable to underestimate Russia’s oil trade. It was struggling when the Soviet Union collapsed within the early Nineties, however righted itself with assistance from Western corporations and has since absorbed applied sciences like fracking and horizontal drilling. Regardless of sanctions imposed to punish Mr. Putin’s takeover of Crimea in 2014, Russia managed to extend manufacturing to a peak in 2019.

Novatek, the Russian firm creating Arctic LNG 2, has even deployed a largely homegrown L.N.G. expertise on an earlier undertaking with TotalEnergies, known as Yamal L.N.G. However the course of has encountered issues and it stays unclear whether or not it might work at full business scale. Novatek declined to remark.

“I wouldn’t say they’re completed as a petroleum energy,” Mr. Clint, the Bernstein analyst, mentioned in an interview. “However they’re actually knocked down the rating for an excellent time period.”