The P15 and P18 blocks nearby Maasvlakte provide good storage capacity as a first link in an offshore network. The TAQA operated P18-A platform is located only 20 km from shore. After cessation of production CO2 can be injected via a new 20 km CO2 specification pipeline and platform P18-A. Feasibility studies of CO2 injection and storage in these depleted natural gas fields will comprise process arrangements for compression, transport and heating, well integrity, reservoir modelling and monitoring and verification techniques.

Phase 1 - Via the P18-A platform CO2 can be injected into several depleted gas reservoirs using multiple injection wells. The combined effective storage capacity accessible from this platform amounts to around 30 million tons of CO2. The effective storage capacity will depend on the maximum reservoir pressure.

Phase 2 - After natural gas production ceases across the P18-A platform, the existing pipeline to P15-ACD can be used to transport CO2 to this central facility from where CO₂

can be distributed to the P15 reservoirs, providing an additional 30 million tons of effective storage capacity.

Phase 3 - When natural gas throughput ceases completely, the 26 inch natural gas pipeline can be turned to CO2 transport duty. The P15-ACD facility could then be used for many years to boost pressure to transport CO2 north to other depleted gas reservoirs.

CATO-2 will help to better understand the design of infrastructure, the possibilities of Enhanced Gas Recovery (EGR) and the suitability of the existing equipment like platforms and interfiled pipelines for CO2 storage. Research results will feed into reservoir modelling to predict dynamic reservoir behaviour.