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ABSTRACT: The cementation factor, m, of Archie's equation has specific effects on electric conduction processes in porous media. It depends on the shape, type, and size of grains; the shape and size of pores and pore throats; and the size and number of dead-end pores. The dependence of m on the degree of cementation is not as strong as its dependence on the shape of grains and pores. Therefore, it is suggested that it is more accurate to call m “shape factor” instead of “cementation factor”. In this study, m was derived from well-log data for the Hibernia and Terra Nova reservoirs in the Jeanne d'Arc Basin, offshore of the eastern Canadian coast. Empirical equations, linking m, tortuosity, pore-water resistivity, and electric and hydraulic anisotropy coefficients, were obtained. The cementation factor (shape factor) is not a constant, but is a variable depending on many physical parameters and lithological attributes of porous media. An average value of 2.28 was obtained for m, which can be used for similar reservoirs. FOR CITATION: Salem, H.S. and Chilingarian, G.V. 1999. The cementation factor of Archie’s equation for shaly sandstone reservoirs. Journal of Petroleum Science and Engineering, 23(2-August): 83–93. https://www.sciencedirect.com/science/article/abs/pii/S0920410599000091 and https://www.researchgate.net/publication/223250823_The_Cementation_Factor_of_Archie's_Equation_for_Shaly_Sandstone_Reservoirs
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Why is it important?
This study, authored in 1999 and published in one of the internationally lead journals concerned with "Petroleum Science, Engineering and technology", has gained a great attention, worldwide, since it was published. That attention has been from petroleum and reservoir engineers, geophysicists, petrophysicists, well-log specialists, and porous-media analysts and modelers. Therefore, no wonder that this paper has been cited and referenced by hundreds of research scientists and postgraduate students, whereas their works have appeared in well-refereed and widely read academic and professional journals and/or presented at international conferences, as well as in Doctorate and Master Theses carried out at prestigious universities, worldwide.
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This page is a summary of: The cementation factor of Archie's equation for shaly sandstone reservoirs, Journal of Petroleum Science and Engineering, August 1999, Elsevier, DOI: 10.1016/s0920-4105(99)00009-1.
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