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Primary and secondary porosity in sandstones possess different pore geometry characteristics, but these are not well quantified. The pore surface area in 2 suites of sandstones exhibiting only primary porosity (Permo-Triassic, Northern Ireland) and only secondary porosity (Cambrian, England) were measured using JMicrovision software. The data show pore surface areas per unit pore volume ∼2.5 times as great in the secondary porosity compared to the primary porosity. This difference is great enough to have a significant impact on properties dependent on pore surface area, including oil production and capacity for microbial colonization in the deep biosphere.
Nolansnyder, D. R., & Parnell, J. (2019). Comparative pore surface area in primary and secondary porosity in sandstones. Journal of Petroleum Science and Engineering, 172, 489–492. https://doi.org/10.1016/j.petrol.2018.09.095