Permeability-porosity relationship in vesicular basalts
نویسندگان
چکیده
The permeability k and porosity φ of vesicular basalts are measured. The relationship between k and φ reflects the formation and emplacement of the basalts and can be related to the crystal and vesicle microstructure obtained by image analysis. Standard theoretical models relating k and φ that work well for granular materials are unsuccessful for vesicular rocks due to the fundamental difference in pore structure. Specifically, k in vesicular rocks is governed by apertures between bubbles. The difference between calculated and measured k reflects the small size of these apertures with aperture radii typically O(10) times smaller than the mean bubble radii.
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