Changes

[[file:predicting-reservoir-system-quality-and-performance_fig9-63.png|300px|thumb|{{figure number|4}}Types of detrital clays in a sandstone. After Wilson and Pittman.<ref name=ch09r68>Wilson, M. D., Pittman, E. D., 1977, Authigenic clays in sandstones: recognition and influence on reservoir properties and [[paleoenvironmental analysis]]: Journal of Sedimentary Petrology, vol. 47, no. 1, p. 3–31.</ref> Copyright: Journal of Sedimentary Petrology.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-63.png|300px|thumb|{{figure number|4}}Types of detrital clays in a sandstone. After Wilson and Pittman.<ref name=ch09r68>Wilson, M. D., Pittman, E. D., 1977, Authigenic clays in sandstones: recognition and influence on reservoir properties and [[paleoenvironmental analysis]]: Journal of Sedimentary Petrology, vol. 47, no. 1, p. 3–31.</ref> Copyright: Journal of Sedimentary Petrology.]]

[[Detrital clay]]s can be part of sandstone matrix or grains. As matrix, detrital clays can obliterate permeability. Detrital grains of clay are often [[Ductility|ductile]] and can be compacted into pore spaces during burial. The percentage of detrital clay in a rock determines permeability. [[:file:predicting-reservoir-system-quality-and-performance_fig9-63.png|Figure 4]] shows different types of detrital clays in a sandstone.

[http://www.thefreedictionary.com/Detrital Detrital] clays can be part of sandstone [http://www.britannica.com/EBchecked/topic/369508/matrix matrix] or grains. As matrix, detrital clays can obliterate permeability. Detrital grains of clay are often [[Ductility|ductile]] and can be compacted into pore spaces during burial. The percentage of detrital clay in a rock determines [[permeability]]. [[:file:predicting-reservoir-system-quality-and-performance_fig9-63.png|Figure 4]] shows different types of detrital clays in a sandstone.

==Effect of quartz overgrowths==

==Effect of quartz overgrowths==