First Published: Offshore Magazine - May 2026, by Kristian B. Brandsegg, Sougata Halder, Allan McKay and Gunhild Myhr, TGS
Key Highlights:
- The Elephant site is located on a stable geological platform with thick Jurassic saline aquifers capable of gigaton-scale CO2 storage.
- High-fidelity seismic imaging reduces uncertainties in reservoir connectivity, capacity and containment, supporting robust modeling and injection planning.
- Ongoing risk management focuses on potential leakage pathways, reservoir heterogeneity and pressure variations, with continuous surveillance to validate containment.
- Time-lapse seismic monitoring, ocean-bottom sensing and well integrity surveillance form the core of the project’s MMV strategy, ensuring real-time plume tracking.
The initial dynamic modeling results (total 250 Mt CO2 injection from five injector wells over five years) show that the Elephant CO2 storage site should not see critical pressure increases from the injection of 1 Gt. The CO2 injected appears to stop migrating about 2,000 years after injection. The risk of CO2 migrating out of the aquifer interval appears to be very low. Still, the main lateral leakage point is NE corner of the white-dotted polygon.
Read the full article here.