Optimized Geologic Carbon Storage

RING webinar series

Iman Rahimzadeh Kivi in the Research for Integrative Numerical Geology (RING) webinar on Thursday June 29 at 1:15 pm.

Webinar series of the Research for Integrative Numerical Geology (RING) consortium, Nancy, France

Date: Thursday, 29 June 2023

Starting time: 1:15 pm (Central European Time)

Duration: 1h

Guest Speaker: Iman Rahimzadeh Kivi. Spanish National Research Council (CSIC)

Title: Importance of geological setting in permanent gigaton-scale CO2 storage



Widespread deployment of CO2 capture and storage (CCS) in deep geological formations is ‎identified as an essential component of any efforts to mitigate the climate change crisis. Most ‎assessments conclude that CO2 storage rates in the order of several gigatons per year will be ‎needed to achieve carbon neutrality by 2050. However, concerns exist about the long-term fate ‎of CO2 underground and the possibility of leakage back to the surface. I will present research ‎that investigates what would happen to CO2 injected at climate-relevant rates of gigatons per ‎year over geological time scales (million years), much longer than any assessments performed ‎so far. I will discuss the subsurface CO2 dynamics that can be simplified without loss of ‎generality to vertical CO2 flow and transport concerning long-term CO2 migration through ‎geological layers. Such a model enables us to draw reliable constraints on the CO2 leakage ‎potential over geological time scales at affordable computational costs. Simulation results ‎show that repetitive layering of caprocks, even if pervasively fractured and a few tens of meters ‎thick, will significantly reduce the CO2 leakage risk, ensuring a secure road toward achieving ‎climate targets.

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