Gravitational trapping of carbon dioxide in deep sea sediments: Permeability, buoyancy, and geomechanical analysis

Details Gravitational trapping of carbon dioxide in deep sea sediments: Permeability, buoyancy, and geomechanical analysis Gravitational trapping of carbon dioxide in deep sea sediments: Permeability, buoyancy, and geomechanical analysis

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3424703l&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 24, CiteID L24703

Physics

Geophysics

3

General Or Miscellaneous: New Fields (Not Classifiable Under Other Headings), Physical Properties Of Rocks: Permeability And Porosity, Physical Properties Of Rocks: Fracture And Flow, Marine Geology And Geophysics: Marine Sediments: Processes And Transport, Marine Geology And Geophysics: General Or Miscellaneous

Scientific paper

Liquid carbon dioxide injected in deep-sea sediments at km depths and near freezing temperatures is denser than surrounding pore water and will be trapped by gravitational forces. Storage capacity for CO2 in such formations below the ocean floor is shown to vary with seafloor depth, geothermal gradient, porosity, and pore water salinity. The formation permeability, or the successful engineering of such permeability through hydraulic fracturing, will determine the capacity for gravitational trapping in deep-sea geological formations. We conclude that most ocean sediments at appropriate depth will lack the required permeability and that conventional hydraulic fracturing would only be possible in carefully selected sites.

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