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Carbonate Classification by Vuggy Pore Space
(Thumbnail images with a red border are clickable links to petrographic examples)
Vuggy Pore Space Vuggy porosity is pore space that is within grains or crystals or that is significantly larger than grains or crystals; that is, pore space that is not interparticle. This definition deviates from the restrictive definition of vugs used by Choquette and Pray (1970) as nondescript, nonfabric-selective pores, but it is consistent with the Archie terminology and with the widespread and less restrictive use in the oil industry of the term "vuggy porosity" in referring to visible pore space in carbonate rocks. Vuggy porosity is divided into two classes based on the manner in which the vugs are connected. Separate vugs are interconnected only through the interparticle porosity. Common examples are as leached grains and fossil chambers. Touching vugs form a interconected pore system of significant extent. Common examples are solution enlarged fractures and large, irregular cavities. Fracture porosity is included as a type of touching-vug porosity to be inclusive.
Interparticle Pore Space Classification | Petrophysics of IPS Data and Classes | Vuggy Pore Space Classification | Petrophysics of VPS Data |
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