UKCCSRC - Carbon Capture & Storage (CCS) Monitoring of the Deep Subsurface: Leakage pathways – understanding and monitoring the mechanics of CO2 storage

The processes accompanying CO₂ migration or leakage through the geological seals of storage sites is an important research topic. It is exceedingly likely that intact water-saturated cap-rocks will act as capillary seals and prevent leakage of free CO₂. However typical overburden successions contain faults and fractures and also natural fluid-flow pathways that are at least partially saturated with natural gas.
The sealing performance of these features may not be so good, particularly in the context of changing stress fields and increasing reservoir pressure as injection proceeds. If CO₂ does enter the overburden a number of attenuation processes will be triggered, including diffusion and dissolution into the water phase and chemical reaction with the pore-fluid and rock minerals.
This meeting aims to bring together researchers from different disciplines, showing laboratory results, models and analysis of monitoring data from real storage sites, to discuss these issues, try to better understand them, and plan how further research might be developed.
PROCEEDINGS
The meeting proceedings including agenda, presentations etc can be downloaded here

AGENDA (click on presentation titles for available PDFs)

Time	Speaker Name	Speaker Institution	Presentation Title
Meeting Chairs: Dr Anna Stork, University of Bristol (am) Professor Michael Kendall, University of Bristol (pm)
9.45 – 10.15	Arrival and registration
10.15 – 10.40	John Marshall	Shell	The Peterhead CO₂ storage project – understanding subsurface containment issues
10.40 – 11.05	Lisa Roach	University of Leeds	Pre-Injection Assessment of Time-Lapse Seismic Repeatability at the Aquistore CO₂ Storage Site using a Sparse Seismic Array
11.05 – 11.30	Coffee Break
11:30 – 11.55	Angus Best	University of Southampton	Physics of rocks for CO₂ reservoir characterisation and monitoring
11.55– 12.20	Dan Faulkner	University of Liverpool	Deformation and fluid flow evolution of caprock during injection of CO₂ from laboratory experiments
12.20 – 12.45	Sam Krevor	Imperial College London	Immobilisation in the permeable zone – Residual trapping, capillary heterogeneity and exsolution
12.45 – 13:30	Lunch
13:30 – 13.55	Laurence Cowton	University of Cambridge	How thick is a thin layer? 4D seismic monitoring of CO₂ sequestration at the Sleipner Field
13.55 – 14.20	Andy Chadwick and Tom Bradwell	BGS	Musings on potential CO₂ migration along pre-existing (or former) fluid flow pathways in the overburden
14.20 – 14.50	Coffee Break
14.50 – 15:15	Tom Lynch	University of Leeds	Modelling Stress Path and Fracture Pressure Hysteresis for CO₂ storage in depleted reservoirs
15.15 – 15.40	James Verdon	University of Bristol	CCS and Induced Seismicity
15.40 – 17.00	Discussion Facilitated by Dr Andy Chadwick, BGS
17.30	Dinner (The Mall Pub, 66 The Mall, Bristol BS8 4JG)

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Monitoring of the Deep Subsurface: Leakage pathways – understanding and monitoring the mechanics of CO₂ storage

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