Subsea CCS projects are still in their early stages, with industry standards and regulations for their design currently developing across many regions. To help the industry evaluate key decisions and mitigate risks unique to a subsea CCS system, IOGP has published a webpage to promote its comprehensive guidance resources.
While building on the extensive knowledge from the subsea oil and gas industry, the guidance specifically addresses the unique aspects and challenges of subsea CO₂ injection systems.
IOGP Report 665, “Design guidance for subsea carbon capture and storage systems” provides a comprehensive overview for designers and developers. This report covers project overviews, subsea systems design, architecture, operational considerations like flow assurance, barrier philosophy, and equipment functional requirements. It also includes guidance on the potential reuse of existing equipment and practical advice for installation, commissioning, and intervention operations9.
Building upon Report 665, IOGP Report 665-1, “Subsea Barrier and Isolation Philosophy for CCS Systems”, offers additional detailed guidance specifically on subsea isolation and barrier design philosophy. This report delves into general barrier principles, well barrier testing strategies unique to CO₂ systems, subsea barrier overviews, and detailed strategies for preventing leakage from the injection flow path. It also evaluates different tree system and Downhole Safety Valve (DHSV) options and highlights how CCS-specific risks influence design decisions. The guidance emphasizes the application of two-barrier systems and how they differ for CCS compared to hydrocarbon systems.
This new webpage is an essential resource for anyone involved in subsea CCS projects. Visit the webpage to access the full reports and gain valuable insights into this critical area of energy transition.
