Neptun Deep under hybrid pressure: protecting Romania’s offshore gas project to the 2027 startup

This report assesses the hybrid-threat environment around Neptun Deep, Romania’s 4-billion-euro offshore gas project in the Black Sea, and what protecting the field, its subsea infrastructure, and the onshore terminal at Tuzla requires before the planned 2027 startup. It scores 42 domain intersections across systems, power, economics, culture, technology, resources, and actors, drawing on 242 evaluated sources. The headline judgment: the project is more likely to be stalled by cost than by damage.

The mechanism is insurance. Under UNCLOS, an Exclusive Economic Zone grants sovereign rights over resources but not territorial sovereignty, so it is unsettled who is obliged to defend infrastructure sitting inside it, and unsettled whether an attack there triggers NATO’s Article 5. Private underwriters cannot price that ambiguity. The Black Sea is already rated a high-risk zone with additional-premium requirements on offshore and maritime operations, and standard policies increasingly exclude hybrid sabotage or cannot separate it from accidental failure. The result is permanent upward pressure on operating expenditure and a state left as insurer of last resort. An adversary who keeps premiums volatile achieves economic attrition without a kinetic strike.

The threat is held below response thresholds by design. Russian state actors, with the FSB’s 16th Centre named as a director of campaigns, outsource sabotage to a "gig economy" of criminal and hacktivist proxies, which complicates attribution and removes the political trigger a consolidated NATO or EU response would need. Around that sit drone harassment, GPS jamming, drifting sea mines, and artificial navigation exclusion zones. Fixed subsea assets cannot be moved out of the way, and legacy operational technology and industrial control systems, including end-of-life Schneider Electric components, widen the digital attack surface.

Romania’s defensive investment is real but uneven. EU money through the SAFE program funds surveillance rather than physical protection, and there is still no single national structure responsible for offshore platform security. The report’s priority recommendation is a state-backed war-risk insurance pool for critical energy projects, run by the Ministry of Finance, to stabilize operating costs and keep the project bankable; second is an integrated Black Sea maritime security task force joining military, SRI, and operator intelligence. The largest intelligence gap is the absence of verified, granular data on drone incursions and electronic-warfare interference inside the Neptun Deep block itself, which prevents anyone from separating routine Black Sea noise from deliberate shaping operations.