Greece’s strategy for phasing out Russian gas

The first step in the transition to the post-Russian gas era is the disengagement plan prepared by the Ministry of Environment and Energy, which outlines the general directions for replacing the volumes of natural gas currently supplied to the country.

Following the European Union’s decision in December 2025 to fully phase out Russian gas, Member States were required to submit national disengagement plans by 1 March 2026.

Greece, according to sources at the Ministry of Environment and Energy, complied with this obligation within the stipulated timeframe. The plan sets out broad guidelines for the substitution of existing volumes, while further specification of measures and policies will follow over time, as implementation progresses and as the EU’s relevant milestones for the gradual phase-out of Russian hydrocarbons draw closer.

Russian gas in Greece

According to the latest available data from the Hellenic Gas Transmission System Operator (DESFA), Russian gas imports via Sidirokastro reached 8.77 TWh in the first quarter, accounting for approximately 33% of total gas imports.

In relation to domestic consumption (20.43 TWh), the share of Russian gas stood at roughly 43%.

More broadly, the plan currently under review by the European Commission provides a comprehensive mapping of each Member State’s ability to effectively manage the loss of volumes currently supplied from the East.

In this context, according to informed sources familiar with the relevant framework, Member States were required to report, first, the availability of their infrastructure, including any needs for new capacity, and second, their sources of natural gas supply. However, they were not required to specify in detail how Russian gas volumes would be replaced at a national level.

In Greece’s case, the same sources underlined that both market conditions and available data confirm the country’s ability to ensure a smooth transition to the post-Russian gas era.

In other words, “we have sufficient capacity to cover the gap that will arise,” the sources noted, referring both to the ability to secure significantly higher volumes of liquefied natural gas (LNG) and pipeline gas from Azerbaijan via the Trans Adriatic Pipeline (TAP).

Although LNG is expected to serve as the primary pillar for replacing Russian gas volumes, the Greek plan is not strictly limited to natural gas alternatives. Instead, it seeks to outline broader interventions aimed at reducing the overall dependence of the national energy mix on natural gas.

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