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| Titel |
Optimising geological storage of CO2 by development of multiple injection sites in regionally extensive storage sandstones |
| VerfasserIn |
Maxine Akhurst, Christopher McDermott, John Williams, Eric Mackay, Min Jin, Owain Tucker, Tom Mallows, Sarah Hannis, Jonathan Pearce |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128893
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| Publikation (Nr.) |
 EGU/EGU2016-8932.pdf |
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| Zusammenfassung |
| Carbon capture, transport and storage (CCS) is considered a key technology to provide
secure, low-carbon energy supply and industrial processes to reduce the greenhouse gas
emissions that contribute to the adverse effects of climatic change. Geological storage of
carbon dioxide (CO2), captured during hydrocarbon production at the Sleipner
Field, in strata beneath the Norwegian sector of the North Sea has been in operation
since 1996. Projects to store CO2 captured at power plants in strata underlying
the North Sea are currently in design. Storage of the CO2 is planned in depleted
hydrocarbon fields or regionally extensive sandstones containing brine (saline aquifer
sandstones).
The vast majority of the UK potential storage resource is within brine-saturated sandstone
formations. The sandstone formations are each hundreds to thousands of square kilometres in
extent and underlie all sectors of the North Sea. The immense potential to store CO2 in these
rocks can only be fully achieved by the operation of more than one injection site within each
formation. Here we report an investigation into the operation of more than one injection site
within a storage formation using a UK North Sea case study of the Captain Sandstone and the
included Goldeneye Field, which is part of the mature hydrocarbon province offshore
Scotland.
Research by the CO2MultiStore project was targeted to increase understanding and
confidence in the operation of two sites within the Captain Sandstone. Methods were
implemented to reduce the effort and resources needed to characterise the sandstone, and
increase understanding of its stability and performance during operation of more than one
injection site. Generic learning was captured throughout the research relevant to the
characterisation of extensive storage sandstones, management of the planned injection
operations and monitoring of CO2 injection at two (or more) sites within any connected
sandstone formation.
The storage of CO2 can be optimised by the operation of more than one injection site in a
geological formation by taking a regional-scale approach to site assessment. The study
concludes that at least 360 million tonnes of CO2 captured over the coming 35 years could be
permanently stored using two injection sites in the Captain Sandstone. Confidence in the
planned operation of two or more injection sites in a storage formation is greatly
increased by the use of existing information, knowledge and data acquired during
hydrocarbon exploitation. Widespread pressure changes should be expected by the
injection of CO2 at more than one site. Assessment, management and monitoring
of pressure changes on a regional scale will optimise the storage capacity, ensure
security of storage and prevent adverse effects to existing storage and hydrocarbon
operations.
The vast offshore potential across all sectors of the North Sea could be made accessible
and practical for storage of CO2 captured at European sources by the operation of two or
more sites in a storage formation by following the approach taken in CO2MultiStore. |
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