Europe began the refill season with depleted gas stocks and may enter winter with an unusually thin buffer as LNG disruption and the phase-out of Russian supply converge. The system has enough import infrastructure, but securing the necessary volumes could be expensive and vulnerable to another global shock.
Europe is rebuilding its gas reserves from one of the weakest post-winter positions in years, creating a practical test of whether the continent can complete its exit from Russian supply while remaining exposed to disruption in the global liquefied natural gas market.
EU storage sites were about 28% full at the start of April after a colder winter and tight supply. The European Network of Transmission System Operators for Gas said refilling would require LNG imports to be maximised throughout the summer under constrained scenarios. Its 2026 summer outlook identified sustained injections as essential to preparing for the coming heating season.
More recent analysis has warned that the current pace could leave Europe entering winter with its lowest buffer in many years. That is not the same as an imminent shortage. Europe has extensive storage and regasification infrastructure, multiple pipeline suppliers and the ability to reduce demand. The risk is that a cold winter or another supply interruption would begin from a thinner margin and force buyers to compete aggressively for cargoes.
The refill starting point matters
Gas storage acts as insurance. It allows Europe to meet daily winter demand when pipeline and LNG imports are insufficient, and it supports gas-fired electricity generation during periods of low wind, limited solar output or high power demand.
Beginning the injection season at 28% means traders must buy and store a larger volume before winter. The physical task is possible, but the commercial incentive may be weak when summer gas is expensive relative to expected winter prices. A company may lose money by buying now and selling later unless regulation, subsidies or market conditions compensate it.
ACER estimates that an 80% storage level is achievable if LNG imports continue around recent rates. It also warns that the additional refill bill could reach EUR10 billion to EUR15 billion and that global supply remains tight.
The question is therefore not simply whether terminals and pipelines can handle the gas. It is who will buy it, at what price, and whether cargoes remain available if Asian demand rises.
LNG diversification creates concentration elsewhere
Europe’s replacement of Russian pipeline gas was a strategic success. New terminals, lower demand, Norwegian supply and record imports of LNG prevented Moscow from using gas as decisively as it had hoped.
The new system is more diversified geographically but more exposed to the global LNG market. The United States now provides a large share of European LNG, while Qatar remains important to world supply. A disruption in the Gulf can redirect Atlantic cargoes towards Asia even if Europe receives little Qatari gas directly.
The EU’s planned Russian phase-out will remove another source of flexibility. EU Today reported that the Russian LNG ban also closes a resale route for European energy companies, making the restriction broader than a simple prohibition on unloading cargo inside the bloc.
The policy is justified by the need to stop financing Russia’s war and eliminate a strategic dependency. Its timing increases the importance of a credible storage and diversification plan.
Infrastructure is strong, but geography still matters
Europe has roughly 145 billion cubic metres of LNG regasification capacity and around 104 bcm of storage, according to infrastructure operators. Those headline figures can obscure regional constraints.
Terminals are concentrated near coasts, while storage and winter demand are spread across the continent. Gas must move through pipelines that may become congested. Central and south-eastern Europe have different access options from Spain, France or the Netherlands.
This is why Norway remains strategically important. EU Global recently examined Oslo’s argument that Arctic gas should be treated as a European security asset. Additional Norwegian supply can reduce exposure to seaborne disruption, but mature fields, maintenance and environmental policy limit how quickly output can expand.
A storage target is not a supply strategy
EU rules set storage objectives because the market did not always provide enough security after Russia’s invasion. Targets can ensure a minimum buffer, but they can also force purchasing at expensive moments and shift costs to consumers or governments.
Flexibility introduced into the rules recognises that countries have different storage capacity and demand profiles. It should not become an excuse to postpone injections in the hope that prices fall later. Waiting can be rational for an individual company while increasing collective risk.
Governments need to monitor not only the percentage full but the speed of injection, the distribution of stocks and the ability to withdraw gas during prolonged cold. Demand reduction, energy efficiency and renewable generation remain part of the security plan because every unit of gas not consumed reduces the refill requirement.
The winter risk is cost and flexibility
Europe is better prepared than it was at the beginning of the 2022 energy crisis. It has more LNG import capacity, stronger coordination and experience reducing demand. That makes a catastrophic supply failure less likely.
The vulnerability has shifted. A thin storage buffer gives Europe less room to absorb a cold spell, an LNG outage, a Norwegian maintenance problem or renewed conflict around Hormuz. Buyers may be able to secure gas, but only by paying enough to divert cargoes from elsewhere.
Higher gas prices would affect households, fertiliser, chemicals, glass, metals and electricity. They would also revive the political dilemma that marked the earlier crisis: whether governments should subsidise consumption, support industry or allow prices to force demand lower.
The Russian gas exit is entering its implementation phase. Success will not be measured only by the absence of Russian molecules from European contracts. It will be measured by whether Europe can reach winter with enough stored gas, diversified supply and manageable prices to prevent Moscow’s lost leverage from being replaced by vulnerability to the next global disruption.
