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IEA Greenhouse Gas R&D Programme

2017-08 Front Cover Website

CO2 Migration in the Overburden

This report summarises the characteristics and processes that can influence the retention and migration of CO2 above a deep geological storage site. The potential rates of migration for each migration pathway and the implications for leakage are discussed. Secondary trapping mechanisms within the overburden are also discussed within the report.  The conclusions are focused on tying overburden characteristics to their impact on developing risk assessments.

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