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Trans-Balkan Gas Corridor: Ukraine Re-opens Southern Gate for European Traders

by Roman Cheplyk
Wednesday, July 2, 2025
2 MIN
Trans-Balkan Gas Corridor: Ukraine Re-opens Southern Gate for European Traders

Daily flows restart via Greece–Bulgaria–Romania–Moldova, unlocking bonded-storage arbitrage and new mid-stream investment zones

Key Facts

Metric 1 July 2025 Context & Signal
Restarted route Trans-Balkan (Revithoussa LNG / Greek hubs → UA) Diversifies away from northern entry points
Booked capacity ~162 000 m³ per day Initial pilot volumes; slots still available
Total daily imports 26.7 mcm (- highest since Feb-25) Potential monthly inflow > 0.8 bcm if sustained
Bonded storage share 92 % (24.7 mcm) injected tax-free Positions UA UGS as transit-and-trading hub

Why It Matters for Investors

  1. Southern Diversification Pays

    • Trans-Balkan line was under-utilised after TurkStream switch-over. Reactivation creates two-way flexibility for EU shippers accessing Ukrainian underground gas storage (UGS) – Europe’s largest (31 bcm working capacity).

  2. Bonded-Warehouse Arbitrage

    • Non-resident traders can park molecules in Ukrainian UGS duty-free, re-exporting to EU hub peaks. 2023/24 spreads topped €15-20/MWh during winter drawdowns.

  3. Infrastructure Upside

    • Compression revamp & metering. Naftogaz seeks partners for turbine upgrades along the South-West corridor; EBRD and US DFC prepared to co-finance.

    • UGS modernisation. Priority sites: Bilche-Volytsya, Bohorodchany (proximity to Romanian border). CAPEX pay-back driven by storage spreads and firm capacity bookings.

  4. Supply Sourcing Optionality

    • Access to LNG at Revithoussa and future Alexandroupolis FSRU plus Azeri gas via TAP enables portfolio blending. Investors in upstream Med & Caspian volumes gain year-round offtake route into Ukraine / CEE.

  5. Regulatory Confidence

    • Ukraine aligned entry tariffs and network codes with EU’s Third Energy Package; ERRA-certified TSO ensures transparent capacity auctions on RBP/PRISMA platforms.

“The revived Trans-Balkan flow strengthens both Ukraine’s energy security and its emerging role as Eastern Europe’s balancing storage hub.”
Serhii Makogon, former GTSOU CEO


Next Steps for Prospective Stakeholders

  • Book Storage: Q3/25 tenders open for winter-season capacity; non-resident accounts processed within 48 h.

  • Co-Invest in Compression: Joint ventures sought for turbine efficiency upgrades (Stage-I €120 m).

  • Explore LNG-to-UGS Swaps: Structured deals integrating Greek FSRU slots with bonded storage rights.

  • Monitor Tariff Review: NEURC to finalise multi-year entry/exit framework by October 2025, locking in predictable returns.

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