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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.376 SNIP: 0.466 CiteScore™: 0.83

ISSN Print: 2151-4798
ISSN Online: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v4.i1.60
pages 57-67

A NEW CORRELATION TO ESTIMATE PERMEABILITY IN CARBONATE ROCKS USING MERCURY INJECTION CAPILLARY PRESSURE DATA

Mohammad Ahmadi
IOR Research Institute, National Iranian Oil Company, Tehran, Iran
Sadegh Fathollahi
National Iranian South Oil Company, Ahwaz, Iran
Amin Ghafory
Pars Oil and Gas Company, Tehran, Iran
Emad Roayaei
IOR Research Institute, National Iranian Oil Company, Tehran, Iran

ABSTRACT

The mercury injection capillary pressure (MICP) technique provides us with valuable information about the pore throat sizes and distribution and also the entry pressure of rocks; therefore many researchers made use of its data to estimate permeability. Most of these models need some graphical or curve fitting task to get the required parameters for estimating permeability and/or they suffer from inaccuracy in low permeability rocks. This work is aimed at getting easier and better estimation of permeability in the case of low permeability carbonate rocks. By the use of regression analysis, a correlation between permeability, porosity, and a new defined parameter (the area above the log-log plot of capillary pressure vs saturation, Alog _ log) has been found. The correlation is simple, easy to use, and works well in low permeability carbonate rocks where the ambiguous network structure of the pore system makes the estimation severely complex.