Changes

[[file:predicting-reservoir-system-quality-and-performance_fig9-10.png|thumb|300px|{{figure number|1}}From Coalson et al.<ref name=Coalsonetal_1994>Coalson, E. B., S. M. Goolsby, and M. H. Franklin, 1994, Subtle seals and fluid-flow barriers in carbonate rocks, ''in'' J. C. Dolson, M. L. Hendricks, and W. A. Wescott, eds., Unconformity related hydrocarbons in sedimentary sequences: Rocky Mountain Association of Geologists guidebook for petroleum exploration and exploitation in clastic and carbonate sediments, p. 45-58.</ref> Courtesy RMAG.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-10.png|thumb|300px|{{figure number|1}}From Coalson et al.<ref name=Coalsonetal_1994>Coalson, E. B., S. M. Goolsby, and M. H. Franklin, 1994, Subtle seals and fluid-flow barriers in carbonate rocks, ''in'' J. C. Dolson, M. L. Hendricks, and W. A. Wescott, eds., Unconformity related hydrocarbons in sedimentary sequences: Rocky Mountain Association of Geologists guidebook for petroleum exploration and exploitation in clastic and carbonate sediments, p. 45-58.</ref> Courtesy RMAG.]]

[[:file:predicting-reservoir-system-quality-and-performance_fig9-10.png|Figure 1]] illustrates the concepts of pore size and pore throat size determined by measuring the radius of a sphere in the pore and the radius of a disk in the pore throat. Pore size can be estimated visually by using an SEM ([[Scanning electron microscopy (SEM)|scanning electron microscope]]), for example. Pore throat sizes for a rock can be measured using [[capillary pressure]]–mercury injection tests, which can be converted to a distribution or profile of pore throat sizes for a sample. Erlich et al.<ref name=ch09r17>Erlich, R., Crabtree, S., J., Horkowitz, K., O., Horkowitz, J., P., 1991, [http://archives.datapages.com/data/bulletns/1990-91/data/pg/0075/0010/0000/1547.htm Petrography and reservoir physics, 1: objective classification of reservoir porosity]: AAPG Bulletin, vol. 75, no. 10, p. 1547–1563.</ref> describe a procedure for estimating pore and pore throat size from thin section image analysis.

[[:file:predicting-reservoir-system-quality-and-performance_fig9-10.png|Figure 1]] illustrates the concepts of pore size and pore throat size determined by measuring the radius of a sphere in the pore and the radius of a disk in the pore throat. Pore size can be estimated visually by using an SEM ([[Scanning electron microscopy (SEM)|scanning electron microscope]]), for example. Pore throat sizes for a rock can be measured using [[capillary pressure]]–mercury injection tests, which can be converted to a distribution or profile of pore throat sizes for a sample. Erlich et al.<ref name=ch09r17>Erlich, R., Crabtree, S., J., Horkowitz, K., O., Horkowitz, J., P., 1991, [http://archives.datapages.com/data/bulletns/1990-91/data/pg/0075/0010/0000/1547.htm Petrography and reservoir physics, 1: objective classification of reservoir porosity]: AAPG Bulletin, vol. 75, no. 10, p. 1547–1563.</ref> describe a procedure for estimating pore and pore throat size from [[Thin section analysis|thin section image analysis]].

==Aspect ratio==

==Aspect ratio==