What is it about?

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

Featured Image

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.


It was a great honor for me to work together on this paper with Prof. Dr. George V. Chilingarian from the University of Southern California, Los Angeles, California, USA. Working with Prof. Chilingarian, who has authored over 50 books and more than 600 papers, was indeed a great opportunity for me, especially it was just the beginning of my career. That was after I obtained my PhD degree from Germany under the supervision of the late Prof. Dr. Rolf Meissner, May God bless his soul, and Prof. Dr. Hans-Joachim Kümpel, who was until a few years ago the President of the Institute for Geosciences and Natural Resources (Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)), Hannover, Germany.

Prof. Dr. Hilmi S. Salem

Read the Original

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.
You can read the full text:



The following have contributed to this page