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-Yun-Chen YuJia-Jyun Dong2011/05/19OutlineIntroductionMaterials and methodsDescription of the rock samplesLaboratory measurement systemKlinkenberg effectExperimental resultsModels for describing the effective confining pressure dependency of porosityModels for describing the effective confining pressure dependency of permeabilityThe porosity-permeability relationshipMicrostructureFuture work

IntroductionGeological storage of CO2 is one of the more technologically advanced options available. (Baine and Worden, 2004)

(http://ccs.tw/itri)Porosity and permeability are key fluid flow properties. (David et al., 1994)Porosity and permeability are controlling parameter of fluid flow systems at depth. (Tanikawa and Shimamoto, 2009)

(Mondol et al., 2007)

(Athy, 1930)(Hsu, 2007; Dong et al., 2010)the porosity under the effective confining pressurethe porosity under the atmospheric

matreial constant

(David, 1994)(Shi and Wang,1986)(Hsu, 2007; Dong et al., 2010)the permeability under the effective confining pressurethe permeability under the atmosphericmatreial constant

(David, 1994)(Yang and Aplin, 2007)

The porosity-permeability relationship(Dewhurst et al., 1998)(Tanikawa and Shimamoto, 2009)IrrecoverabledeformationStress historyKlinkenberg effectPore spaceSizeShapeConnectivityGrainSizeShapeRock type(Bryant and Blunt, 1992; Schwartz et al., 1993; Koponen et al., 1997; Forster et al., 2003)Materials

(Lin and Watts, 2002)(2009)Measurement system

Klinkenberg effect

slip flow

(Tanikawa and Shimamoto, 2009)the pore pressure in the upper and lower ends of the sample

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(Tanikawa and Shimamoto, 2009)(Tanikawa and Shimamoto, 2009)Results

Pre-consolidation stress13

Pre-consolidation stress(2009)14

Pre-consolidation stressMaximum effective stressDe-compressionRe-compressionVirgin compression

(Singh, 1997)

1mm1mm

(Pettijohn., 1987)Quartz (%)Mica (%)Feldspar (%)Calcite (%)Rock fragment (%)Others (%)Future work

Secondary Electron ImageBackscattered Electron ImageThanks for your attention.