Romania’s Neptun Deep project is becoming the most important upstream gas development in south-east Europe. Developed by OMV Petrom as operator and Romgaz as partner, the Black Sea project carries an estimated investment of up to €4bn and is described as the largest offshore natural gas project currently under development in the European Union. For SEE, its importance lies not only in production volume, but in its ability to change the region’s gas trade balance.
The project’s technical scale is substantial. Saipem has completed load-out of a major offshore jacket from its Arbatax yard in Sardinia. The structure weighs around 7,500 tonnes and stands about 135 metres tall. The wider scope includes an offshore gas processing platform at roughly 100 metres water depth, subsea developments in the Domino and Pelican fields, a 160 km, 30-inch gas pipeline and a fibre-optic connection to the Romanian coast. Offshore installation will use major vessels including Saipem 7000 and JSD 6000.
The commercial stakes are even larger. Romania could become a significant net gas exporter by 2028, with surplus production exceeding domestic demand by more than 60 TWh/year. Market access to up to 5 bcm/year of Romanian gas exports could determine whether neighbouring countries secure cheaper regional supply or remain dependent on tighter alternatives. First gas from Neptun Deep is expected in September 2027.
The project also exposes a policy dilemma in Bucharest. Romanian offshore law gives the state a right of first refusal over offshore gas volumes. OMV Petrom has been preparing multi-year sales, with Hungary’s MVM reported as an interested buyer, while the government faces the strategic question of whether Black Sea gas should primarily secure domestic supply or become a regional export commodity.
For Serbia, Bulgaria, Hungary and Moldova, Neptun Deep is not an abstract Romanian asset. It is a potential supply reset. Serbia’s planned gas interconnection with Romania, expected within the next two years according to Serbian government statements cited in the report, would give Belgrade a direct route into the Black Sea gas system.
The project therefore sits at the intersection of energy security, industrial policy and regional trading. Romania can become a gas anchor for SEE, but only if domestic policy, export rules and interconnector capacity align. The Black Sea is no longer just a frontier basin. It is becoming the region’s next price-setting source.
