Serbia pushes to expand Banatski Dvor gas storage, but Russian control limits domestic flexibility

Serbia’s long-delayed effort to expand its only underground gas storage facility is moving forward, but the project underlines a structural constraint in the country’s energy system: even as physical capacity grows, control over that capacity remains closely tied to Russia’s Gazprom.

Capacity rises, but usable volume stays constrained

The expansion at Banatski Dvor is expected to be completed by end-2026. It would increase total storage capacity from roughly 450 million cubic metres to around 750 million cubic metres—adding about 300 million cubic metres of new space.

However, the headline figure does not translate into full domestic flexibility. After the upgrade, Serbia would be able to freely dispose of only just over 350 million cubic metres, because a substantial portion of the facility continues to sit under Gazprom’s control.

Joint venture structure keeps part of storage reserved for Russian use

This ownership arrangement stems from the joint venture model behind Banatski Dvor. Serbia, via Srbijagas, holds a minority or shared stake alongside Russian partners. In practice, this means part of the stored gas is effectively reserved for Russian commercial use rather than being available for Serbia’s own energy security needs.

The result is a paradox for policymakers and investors alike: storage capacity is increasing, but sovereign control over that capacity is not expanding at the same pace.

Modest domestic buffers have persisted for more than a decade

Even today, Serbia’s domestic storage position remains modest. The country has around 450 million cubic metres of underground storage capacity and has kept that level largely unchanged for more than a decade due to repeated delays in the expansion project.

To compensate for limited domestic buffers, Serbia has relied heavily on external storage—particularly in Hungary. Under earlier arrangements with Hungarian partners, it secured access to roughly 500 million cubic metres of storage abroad, though those agreements have reportedly cost approximately €275 million.

This dependence highlights a broader vulnerability: Serbia’s gas system is not only supply-dependent but also storage-dependent on infrastructure outside its borders.

A larger target depends on more than Banatski Dvor

Looking beyond Banatski Dvor, Serbia’s stated ambition is far larger. Authorities have outlined a target of 2 billion cubic metres of total storage capacity, which would allow the country to cover roughly half of its annual gas consumption domestically.

Reaching that scale would require not only completing the Banatski Dvor expansion but also developing additional storage sites—an infrastructure agenda that would likely run into multi-billion-euro territory and connect directly to broader energy diversification efforts.

Diversification plans collide with persistent Russian ownership

Serbian officials have linked storage expansion to the need for alternative supply routes, including gas from Azerbaijan and potential access to LNG through regional interconnections. But the persistence of Russian ownership within the core storage asset limits how far diversification can go in practice: even if supply sources change, parts of the physical system underpinning resilience remain partially controlled by Serbia’s dominant supplier.

Delays traced back to Gazprom-side leverage

The tension is not new. The Banatski Dvor expansion was first agreed in 2015, with follow-up agreements signed in 2016 and 2019. Progress then stalled for years largely due to delays on the Russian side—delays that analysts have often interpreted as leverage designed to maintain Serbia’s dependence on Russian gas across both supply and storage.

Shared infrastructure creates unequal access during critical periods

Operationally, split ownership has produced tangible constraints. At various points, Serbia has held roughly 400 million cubic metres of its own gas in storage alongside around 270 million cubic metres belonging to Russia—illustrating how capacity can be shared while access remains uneven.

For policymakers, that means the challenge is twofold: increasing storage capacity is necessary to improve resilience during winter demand peaks. But without a parallel shift in ownership or control, expanding volumes alone will not fully deliver energy sovereignty.

In that sense, Serbia’s Banatski Dvor expansion should be viewed less as a transformational step and more as an incremental adjustment inside a constrained system—where infrastructure buildout, contractual arrangements and geopolitics remain tightly interlinked.