Wintershall Dea investigates conversion of north sea natural gas pipelines for CO2 transport

Initial calculations paint a positive picture. Results obtained so far suggest that the offshore pipelines could be safely and efficiently repurposed for transport of liquid CO₂. As the study progresses, technical feasibility will be tested, and certification will take place.

There are over 4800 km of pipelines in the southern North Sea, of which 1200 km are operated by Wintershall Noordzee, a 50:50 joint venture between Wintershall Dea AG and Gazprom EP International B.V. Parts of this network could be used for CO₂ transport. Wintershall Noordzee also operates numerous depleted reservoirs. These are potentially suitable for storing CO₂, which can play an important role in climate protection.

The Dutch Continental Shelf offers enormous potential: experts estimate that around 800 million t of CO₂ could be stored(1) there. That’s enough to store the entire annual emissions of all Dutch industry 30 times over, or by comparison, eight years of German industrial emissions, based on 2018 figures.(2)

"We are optimistic about the further investigations. Our calculations already show that existing offshore pipelines could be well suited for transporting liquid CO₂," says Klaus Langemann, Senior Vice President of Carbon Management and Hydrogen at Wintershall Dea.

Together with industry and research partners, Wintershall Dea has developed innovative calculation models that enable completely new insights in this technological field. The next step will be to demonstrate the reliability of the evaluation process and prove the feasibility experimentally.

Companies with unavoidable process emissions – for example those from the steel, cement, or chemical industries – will soon be dependent on underground offshore storage sites for the capture and safe storage of their CO₂ emissions (Carbon Capture and Storage - CCS). Moreover, the CO₂ produced during the production of ‘blue hydrogen’ from natural gas can also be safely stored in this way.

"Wintershall Dea is investing in CCS because we are convinced that it is a safe and affordable technology for decarbonisation. We have the technological know-how and the depleted offshore reservoirs required for CCS, as well as access to the pipeline network for transport," says Klaus Langemann. If existing natural gas pipelines can be used for this purpose, this not only improves the economics of CCS projects, but also contributes to the sustainability of many industrial sectors and their products.

For Wintershall Dea, the study with OTH Regensburg is part of the company's far-reaching measures to drive forward the energy transition. In November 2020, Wintershall Dea set itself climate targets. These include the reduction of Scope 1 and 2 greenhouse gas emissions in all own-operated and non-own-operated exploration and production activities (on an equity share basis) by 2030. Beyond 2030, the company intends to meaningfully reduce their net carbon intensity, including Scope 3 emissions. Here, CCS and hydrogen will be key technologies.

1. Independent assessment of high-capacity offshore CO₂ storage options, TNO, Delft 2012

2. https://www.iea.org/data-and-statistics/data-browser

Read the article online at: https://www.worldpipelines.com/project-news/30092021/wintershall-dea-investigates-conversion-of-north-sea-natural-gas-pipelines-for-co2-transport/