Materials testing starts for CO2 storage project in North Sea


Denmark – Welltec has undertaken rigorous testing to determine the best materials for Project Greensand, an initiative to store CO2 deep beneath the North Sea.

Project Greensand has the capacity to store up to 1.5 million tons of CO2 annually by the end of 2025 and up to 8 million tons of CO2 annually by 2030, making it the most advanced project of its kind in Denmark. Project Greensand is a collaborative effort between 23 organizations from Denmark and other countries.

Welltec’s recently unveiled Test Flow Loop, a 5-by-18-meter test installation, will serve as the scene for crucial corrosion testing, allowing for the objective comparison of the results obtained from using five different materials.

Two-stage testing

Welltec has devised a dual-stage testing procedure to determine the final materials. The initial part of the project involves testing five alternative materials; the outcomes of these tests will be used as a foundation for subsequent qualifying efforts. The results of these tests will be used to propose which materials Project Greensand should use for the key casing pipes that extend 1,800 meters into the seabed to reach the sandstone reservoir.

As part of the CO2 injection pilot project, Project Greensand aims to conduct the first storage of CO2 in the subsurface of the North Sea before the end of the year.