2013
DOI: 10.1007/s11242-013-0232-0
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CT Imaging of Low-Permeability, Dual-Porosity Systems Using High X-ray Contrast Gas

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Cited by 108 publications
(43 citation statements)
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“…For typical gas shale, porosity ranges from 1% to 10% [1,5,39], and this number is lower than that for sandstones. Hence, the average coordination number was assumed to be three in this study.…”
Section: Shale Matrix Pore Network Modelmentioning
confidence: 99%
“…For typical gas shale, porosity ranges from 1% to 10% [1,5,39], and this number is lower than that for sandstones. Hence, the average coordination number was assumed to be three in this study.…”
Section: Shale Matrix Pore Network Modelmentioning
confidence: 99%
“…In light of this requirement, krypton gas was chosen as the working fluid for this study due to its high mass attenuation coefficient, chemical inertness, relatively low cost (compared to other gases with these qualities), and lack of health hazards. Krypton has previously been used with great success as a contrast agent in XCT studies of pulmonary absorption in the medical field (Simon 2005) and rock porosity in the context of petroleum engineering (Vega et al 2014). Linear and mass attenuation coefficients for krypton and other pertinent materials are illustrated in Fig.…”
Section: Theoretical Implications For Experimental Designmentioning
confidence: 99%
“…If the air is removed and replaced by a larger contrast gas such as krypton (ρ ~ 0.003749 g/cc, m.a.c [8 keV] = 9.651E+01 cm 2 /g) (NIST, http://physics.nist.gov/PhysRefData/XrayMassCoef/tab3.html), a greater contrast image of the pore space should be achieved. Details of this method and its application to the study of core-scale gas shale samples are found in Vega et al, 2013. Provided the solid matter does not change between one gas and the other, one can assume the difference between both images will correspond to the pore space accessed by gas.…”
Section: Sample Preparation and Mountingmentioning
confidence: 99%