Towards practical CO2 storage capacity in Dutch depleted gas fields: reservoir quality and regulatory limits reductions
conference paper
CO2 storage capacity is limited in the Netherlands and high demand from emitters makes it essential to determine a practical capacity. Especially if neighbouring countries with even lower storage capacity such as Belgium and Germany will export significant CO2 volumes to fulfil their industrial abatement requirements. Previous work calculated a theoretical capacity for depleted gas fields from a simple gas replacement-pressure relationship. Practical capacity was then derived from a generic discount factor. Aquifer storage potential in the Netherlands was assumed limited but is currently being revaluated. This study shows a significant improvement by analysing the interaction of intrinsic geological properties and potential regulatory choices. Regulatory requirements to mitigate leakage risk by defining strict pressure limits for depleted gas field stores are not yet defined, but could have a strong effect. Hydrostatically limiting the bottom hole pressure is shown to severely reduce the capacity, especially on poorer quality fields and is largely related to pressure build-up around injection wells in these fields. Combined with additional economic limitations, more than 40% of the gas-replaced capacity is lost from the overall portfolio. Given the large effect, the necessity of these risk mitigation measures needs to be further assessed. © 2024 85th EAGE Annual Conference and Exhibition 2024. All rights reserved
TNO Identifier
1013931
ISBN
979-833131001-1
Publisher
European Association of Geoscientists and Engineers, EAGE
Source title
85th EAGE Annual Conference and Exhibition, Oslo, 10 June 2024 through 13 June 2024
Collation
4 p.
Pages
4534-4538
Files
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