Appraisal of global CO2 storage opportunities using the geomechanical facies approach

Different tectonic settings exert different depositional process controls within the tectonic basin which influence CO₂storage site suitability in terms of basin architecture, caprock architecture, reservoir quality, stress state, mechanical characteristics, fractures, burial depth, geothermal gradi...

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Bibliographic Details
Published in:	Environmental earth sciences 2015-06, Vol.73 (12), p.8075-8096
Main Authors:	Edlmann, K, Edwards, M. A, Qiao, X. J, Haszeldine, R. S, McDermott, C. I
Format:	Article
Language:	eng
Subjects:	basins Biogeosciences Carbon dioxide Carbon sequestration Earth and Environmental Science Earth Sciences engineering Environmental Science and Engineering Geochemistry Geology Hydrology/Water Resources mechanical properties Original Article Plate tectonics risk tectonics Terrestrial Pollution
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Summary:	Different tectonic settings exert different depositional process controls within the tectonic basin which influence CO₂storage site suitability in terms of basin architecture, caprock architecture, reservoir quality, stress state, mechanical characteristics, fractures, burial depth, geothermal gradient, risk of orogenic modification, structural stability and preservation potential. We apply the concept of geomechanical facies; where deposits are grouped together on the basis of engineering parameters that fulfil a specific role within the storage system, e.g. reservoir, caprock, overburden; to provide an assessment of CO₂storage suitability for seven different tectonic settings. The geomechanical facies data were analysed using two different multiple attribute decision analysis methodologies and the results show that foreland basins are likely to be the most suitable for CO₂storage, followed by passive continental margins, terrestrial rift basins, Strike-slip basins, Back-arc basins, with oceanic basins, forearc basins and trench basins expected to be the least suitable. The geomechanical facies approach was compared with two current storage projects (Sleipner and In Salah) and a natural CO₂storage analogue (Miller) to build confidence in the methodology. Finally the global distribution of the most likely CO₂storage basins based on their geomechanical facies was mapped and correlated with CO₂emission sources.
ISSN:	1866-6280 1866-6299