Denmark inaugurates CO2 storage facility in North Sea
Denmark inaugurated the Greensand project at the Port of Esbjerg on 18 September 2026, described as the European Union's first full-scale offshore carbon dioxide (CO2) storage facility and value chain to become operational.
The project is led by INEOS Energy along with partners Harbour Energy and Nordsøfonden (the Danish state's oil and gas fund).
Captured CO2 — sourced initially from Danish biomethane plants — is liquefied, trucked to a dedicated terminal at Port Esbjerg, shipped via the purpose-built carrier Carbon Destroyer 1, and injected roughly 1,800 metres below the seabed into the depleted Nini West oil reservoir in the Danish North Sea, about 250 km offshore.
The facility currently stores up to 400,000 tonnes of CO2 annually, with a design target of scaling to 4-8 million tonnes per year at full capacity.
The project supports the EU's broader climate ambition of building CO2 injection capacity of at least 50 million tonnes annually by 2030, rising toward roughly 250-280 million tonnes by 2040.
Carbon Capture, Utilisation and Storage (CCUS)
CCUS refers to the suite of technologies that capture CO2 from industrial sources or the atmosphere, transport it, and either utilise it (e.g., in fuels, chemicals, or enhanced oil recovery) or permanently store it in geological formations such as depleted oil/gas reservoirs or saline aquifers. It is treated as an essential "hard-to-abate" sector tool (cement, steel, refineries) alongside renewable energy and efficiency measures for reaching net-zero targets, since some industrial CO2 emissions cannot be eliminated by electrification alone.
Key Details
- Three stages: capture (post-combustion, pre-combustion, or oxy-fuel), transport (pipeline, ship, or truck), and storage/utilisation.
- Depleted oil and gas reservoirs are preferred storage sites because their geology has already proven capable of trapping fluids/gases for geological time.
- India's own CCUS effort: NITI Aayog released a CCUS policy framework report (2022), and Budget 2026-27 allocated Rs 20,000 crore for CCUS deployment across five sectors (power, steel, cement, refineries, chemicals) over five years, building on a national roadmap launched in December 2025.
- Indian pilot-scale projects include ONGC's Hazira/Dahej injection pilot, ONGC-IOCL work at the Koyali refinery, and Dalmia Cement's carbon-capture cement plant in Tamil Nadu — but these remain far smaller in scale than Greensand.
Greensand represents the first time this full CCUS chain (capture, ship transport, offshore injection) has been operated commercially at scale within the EU, making it a reference model against which India's nascent CCUS pilots are often benchmarked.
Paris Agreement, Article 6 and Carbon Markets
Article 6 of the Paris Agreement (2015) provides the legal architecture for countries and entities to cooperate voluntarily to meet their Nationally Determined Contributions (NDCs), including through carbon markets. Article 6.2 enables bilateral/multilateral trading of "Internationally Transferred Mitigation Outcomes" (ITMOs) with corresponding adjustments to prevent double counting; Article 6.4 establishes a centralised UN-supervised crediting mechanism (the Paris Agreement Crediting Mechanism, successor to the Kyoto Protocol's Clean Development Mechanism); and Article 6.8 covers non-market cooperative approaches. The rulebook for Article 6 was substantially finalised at COP26 (Glasgow, 2021).
Key Details
- Article 6.4 mechanism is often compared to the EU Emissions Trading System (EU ETS), the world's first and largest carbon cap-and-trade market, launched in 2005.
- Geological CO2 storage projects like Greensand can, in principle, generate storage-based credits usable under compliance or voluntary carbon markets, linking industrial CCS infrastructure to Article 6 carbon-trading mechanisms.
- The EU ETS separately regulates emissions from covered installations, creating a price incentive for facilities to invest in CCUS rather than pay for allowances.
Greensand's storage of biomethane-plant CO2 sits at the intersection of industrial decarbonisation and carbon-market mechanisms, illustrating how physical CCS infrastructure and Article 6/EU ETS market instruments are designed to work together to cut net emissions.
- Greensand facility inaugurated: 18 September 2026, Port of Esbjerg, Denmark.
- Lead partners: INEOS Energy, Harbour Energy, Nordsøfonden.
- Storage site: Nini West depleted oil field, Danish North Sea, ~250 km offshore, ~1,800 metres below seabed.
- Current capacity: up to 400,000 tonnes CO2/year; design target 4-8 million tonnes/year.
- EU CO2 injection capacity targets: at least 50 million tonnes/year by 2030; ~250-280 million tonnes/year by 2040.
- India's CCUS budget allocation: Rs 20,000 crore (Union Budget 2026-27) across power, steel, cement, refineries, and chemicals sectors.