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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 114,
B02201,
10 PP., 2009
doi:10.1029/2008JB005758
Porosimetry of vesicular volcanic products by a water-expulsion method and the relationship of pore characteristics to permeability
Department of Earth and Space Science, Osaka University, Osaka Japan
Geosphere Sciences, Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry, Chiba, Japan
Porosimetry of vesicular volcanic products was conducted by a water-expulsion method to investigate the relationship between
pore characteristics and gas permeability. The pores in a rock were categorized as total, connected, transport, dead-end,
and isolated pores. Gas flow takes place only through the transport pores but the pores that do not provide a flow path are
included in both total and connected porosities. Permeability correlated weakly with total porosity, connected porosity, and
transport porosity. The characteristic maximum pore-throat radius r ch (m) was also determined. Both r ch and transport porosity correlated well with permeability k 1 (m2) according to the following form of the Kozeny-Carman relation: k 1 = 0.0022
tra r ch 2. Permeability is thus strongly dependent on pore size, and estimation of pore size is essential for understanding the permeabilities
of vesicular volcanic products.
Received 21 April 2008; accepted 17 November 2008; published 4 February 2009.
Citation: (2009), Porosimetry of vesicular volcanic products by a water-expulsion method and the relationship of pore characteristics to permeability, J. Geophys. Res., 114, B02201, doi:10.1029/2008JB005758.
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