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Methodologies and Technologies for Mitigation of Undesired CO₂ Migration in the Subsurface

Technical Report

1 December 2013

Storage

Jean-Charles Manceau, Dimitrios G. Hatzignatiou, Louis De Lary, Niels Bo Jensen, Kristin Flornes, Thomas Le Guenan, Arnaud Reveillere

Citation: IEAGHG, "Methodologies and Technologies for Mitigation of Undesired CO₂ Migration in the Subsurface", 2013-20, December 2013.

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Publication Overview

The driver behind this study is to develop a report built on the on the previous IEAGHG report on methods of leakage mitigation (2007/11). The proposed study should focus on current mitigation and remediation methods that may be applied or considered in site specific conditions in the event of unpredicted CO₂ migration. Each geological storage site will have an adaptive site specific monitoring plan, based on a risk assessment. Detection of a significant irregularity may involve supplementing the monitoring program, in order to detect a possible leak and if necessary engaging mitigation measures

Publication Summary

  • Migration of CO₂ can occur via engineered or natural pathways. Mitigation methods related to wells are the best established.
  • Measures related to natural pathways are likely to be via pressure management methods.
  • There are many novel technologies available, though current mitigation plans for existing projects include only mature technologies. However, mitigation plans should be flexible to take account of newer technologies when they become available and allow holisitic decision making
  • All mitigation and remediation plans should be site-specific and risk-based.

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