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CLIMIT-Forskning, utvikling og demo av CO2-håndtering

Controlled Source Electromagnetic Monitoring of CO2 Storage Sites

Alternative title: CSEM for overvåking av CO2-lagring

Awarded: NOK 8.4 mill.

An accurate and efficient monitoring strategy is essential for safe CO2 storage in compliance with regulations. Repeated seismic surveys has been the backbone of most CO2 storage monitoring programs. The determination of seismic properties during CO2 injection is crucial for estimation and discrimination between key reservoir property changes such as pressure and CO2 saturation. However, the resulting uncertainty in such processes is usually significant despite all recent advances in seismic technology. Additional geophysical techniques, including electromagnetic (EM) and gravity techniques, are often suggested to help reduce these uncertainties. The marine Controlled Source Electromagnetic (CSEM) technique was developed for oil and gas exploration but has also a potential in CO2 monitoring as the injected CO2 represents a resistivity contrast to the saline pore water. The COSMOS project will investigate the applicability of the latest developments in CSEM technology and how it can be implemented in a cost-efficient manner to monitor the CO2 plume and leakages. The focus will be on the Aurora storage complex which is part of the full-scale Longship project. COSMOS relies on a close cooperation between a research organisation (SINTEF), a vendor (Allton), and an industry operator (TOTAL) and a strong Scientific Advisory Board with national and international experts with experience and expertise covering all aspects of the project. The initial project activities have been: - Setting up Aurora models for detailed CSEM sensitivity studies - Further developments of software for 3D CSEM modelling and inversion

An accurate and efficient monitoring strategy is essential for safe CO2 storage in compliance with regulations. Seismic surveying, including the costly acquisition of multiple vintages, has been the backbone of most CO2 storage monitoring programs. The determination of elastic property changes due to CO2 injection is crucial for estimation and discrimination between key reservoir property changes such as pressure and CO2 saturation. However, the resulting uncertainty in such processes is usually significant despite all recent advances in seismic technology. Additional geophysical techniques, including electromagnetic (EM) and gravity techniques, are often suggested to help reduce these uncertainties. The marine Controlled Source Electromagnetic (CSEM) technique was developed for oil and gas exploration but has also a potential in CO2 monitoring as the injected CO2 represents a resistivity contrast to the saline pore water. This proposal will investigate the applicability of the latest developments in CSEM technology and how it can be implemented in a cost-efficient manner to monitor the CO2 plume and leakages. The focus will be on the Aurora storage complex which is part of the full-scale Longship project. COSMOS relies on a close cooperation between a research organisation (SINTEF), a vendor (Allton), and an industry operator (TOTAL) and a strong Scientific Advisory Board with national and international experts with experience and expertise covering all aspects of the project.

Activity:

CLIMIT-Forskning, utvikling og demo av CO2-håndtering