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Geological CO2 Storage in Swiss Saline Aquifers: Numerical Simulations at Triemli and Insights From the Citru Pilot Project

Description: 

Switzerland will have by 2025 to sequester or export about 7 million tons of hard-to-abate CO2 per year. This study investigates the feasibility of CO2 storage in deep saline aquifers in Switzerland, with a focus on the Triemli site in Zurich and the broader Swiss Molasse Basin and Folded Jura. Detailed numerical simulations at Triemli model the injection and migration of CO2, capturing key processes such as pore-pressure evolution, buoyant migration, and long-term trapping mechanisms. These simulations assess the interplay between reservoir properties, fluid behavior, and operational strategies, providing insights into optimizing storage efficiency while ensuring reservoir stability. They also allow us to define a Measurement, Monitoring and Verification strategy and analyse risks. Key risks for CCS in Swiss aquifers are public acceptance, induced seismicity and CO2 leakage. Complementing this numerical study, the CITru pilot project at Trüllikon (www.citru.ethz.ch) plans a test injection of up to 10´000 tons of CO2 into the upper Muschelkalk aquifer. CITru would generate critical data to validate and refine the predictive models developed for CO2 storage capacity in Switzerland and test our models of induced seismicity and fault reactivation potential during CO2 injections.

Session: Mechanistic Insights into Fluid-induced Earthquakes from the Laboratory to the Field - II

Type: Oral

Date: 4/15/2025

Presentation Time: 05:15 PM (local time)

Presenting Author: Thanushika

Student Presenter: No

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