Wintershall Dea and its partner Ineos have started CO₂ storage in a depleted oilfield offshore Denmark.

As part of Project Greensand, the two firms have captured CO₂ from Belgium and injected it for permanent storage into a depleted Ineos-operated Nini field in the Danish North Sea, at a depth of approximately 1,800m below the seabed.

Backed by €26m in public funding from the Danish government, Project Greensand aims to store up to 1.5 million tonnes per annum (Mtpa) of CO₂ by the end of 2025 and aims to increase the figure to up to eight Mtpa by the end of 2030.

Wintershall Dea CEO Mario Mehren said: “Project Greensand marks a leap forward for the development of a Europe-wide carbon capture and storage (CCS) infrastructure, and therefore for climate protection.

“We are showing that it is possible to capture, transport, and store CO₂ safely and reliably across national borders and the CCS technology will be able to contribute to a decarbonised tomorrow in the near future. Along with our partners, we are pioneers in this game-changing technology.”

Wintershall Dea and Ineos will each own a 40% stake in the project while the remaining 20% stake will be held by state-owned company Nordsøfonden.

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Wintershall Dea executive director board member and chief technology officer Hugo Dijkgraaf said: “Project Greensand proves that CCS is a viable way to permanently store CO₂ emissions under the North Sea. It has a crucial role to play in reaching net-zero in Denmark, Europe, and beyond.”

Ineos and Wintershall Dea lead the consortium of 23 organisations for Project Greensand.

Norway, which has several planned CO₂ storage projects, is also considering signing bilateral deals for cross-border CO₂ transportation, reported Reuters.