TY - JOUR
T1 - Pore-structure visualization in microdioritic enclaves
AU - Pugliese, S.
AU - Petford, N.
PY - 1997
Y1 - 1997
N2 - This paper is part of the special publication Developments in petrophysics (eds M.A. Lovell and P.K. Harvey). We present a simple methodlogy for estimating key petrophysical characteristics of partially molten (igneous) porous media using microgranular (microdiritic) enclaves from the Ross of Mull granite, Scotland, as examples. A number of enclaves have been infiltrated by granitic melt while still partially molten, with the infiltration (porosity) network now preserved as frozen-in granitic melt. By serial sectioning through individual enclaves, we show that the preserved infiltration channel network is interconnected in three dimensions. Using image analysis techniques, we have estimated the porosity (∅) of individual enclave sections and obtained the variation in porosity with depth. Simple representation of the pore-channel network on a branch and node chart allows useful petrophysical characteristics including the connectivity, genus and tortuosity of the network to be estimated. Computer-enhanced reconstructions of the pore network in three dimensions are shown that provide a powerful way of visualizing complex geometries in porous media.
AB - This paper is part of the special publication Developments in petrophysics (eds M.A. Lovell and P.K. Harvey). We present a simple methodlogy for estimating key petrophysical characteristics of partially molten (igneous) porous media using microgranular (microdiritic) enclaves from the Ross of Mull granite, Scotland, as examples. A number of enclaves have been infiltrated by granitic melt while still partially molten, with the infiltration (porosity) network now preserved as frozen-in granitic melt. By serial sectioning through individual enclaves, we show that the preserved infiltration channel network is interconnected in three dimensions. Using image analysis techniques, we have estimated the porosity (∅) of individual enclave sections and obtained the variation in porosity with depth. Simple representation of the pore-channel network on a branch and node chart allows useful petrophysical characteristics including the connectivity, genus and tortuosity of the network to be estimated. Computer-enhanced reconstructions of the pore network in three dimensions are shown that provide a powerful way of visualizing complex geometries in porous media.
UR - http://www.scopus.com/inward/record.url?scp=0031545232&partnerID=8YFLogxK
U2 - 10.1144/GSL.SP.1997.122.01.04
DO - 10.1144/GSL.SP.1997.122.01.04
M3 - Article
VL - 122
SP - 37
EP - 46
JO - Geological Society Special Publication
JF - Geological Society Special Publication
SN - 0305-8719
ER -