CO2 storage: Greensand in the North Sea is validated

The Danish Greensand reservoir has just been approved for CO2 storage. Indeed, DNV GL’s carbon capture and storage certification marks the first phase of validation of the Greensand project.

A first step for a project focused on CO2 storage

The Greensand Carbon Capture and Storage (CCS) project consortium comprising Ineos Oil & Gas Denmark, Wintershall Dea and Maersk Drilling has received DNV GL feasibility certification for CO2 storage in the Nini West reservoir in the Danish North Sea. DNV GL’s Carbon Capture and Storage certification marks the completion of the first validation phase of the Greensand project. Marika Reis, innovation manager at Maersk Drilling, goes into a little more detail about the future of the project:

“As part of the next phase of validation, we will apply DNV GL’s certification scopes for the adequacy of the CO2 injection well design and the well construction process.”

CO2 storage benefits the Danish ecological transition

By reusing abandoned offshore oil fields, the Greensand project aims to develop capacity that would meet a significant portion of Denmark’s CO2 reduction target. With the certification, DNV GL has confirmed that the Nini West field is suitable for the injection and storage of 0.45 million tons of CO2 per year per well for 10 years. The underwater tank can contain the CO2 in compressed form.

Klaus Langemann, Vice President Technology and Innovation at Wintershall Dea, congratulates the accreditation:

“We look forward to further cooperation with the project partners for the next phase and are pleased to contribute to a project with the potential to mitigate CO2 emissions in Denmark.”

An opening of the field of possibilities

As a research partner in the project, the Geological Survey of Denmark and Greenland (GEUS) is currently undertaking laboratory experiments on the base materials of the existing Nini West reservoir. The Greensand project is expected to provide important lessons on offshore drilling platforms and the use of capabilities to reuse existing oil wells for CO2 injection.

K. Langemann is already enthusiastic:

“The Greensand project will advance Wintershall Dea’s understanding of CCS projects, so we are pleased to see the positive results of the study which indicate that there are no barriers to further study of CO2 storage.”

By 2030, the Greensand project aims to store 3.5 million tons of CO2 per year.

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