Cementation exponent estimate in carbonate reservoirs: A new method

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Adel Shirazy
keyvan khayer
Aref Shirazi
Abdolhamid Ansari
Ardeshir Hezarkhani


There are two approaches for measuring hydrocarbon saturation: well log interpretation and usually developed formulas. Archie’s equation is one of the most fundamental equations used for water saturation calculation. Archie’s equation includes three factors: cementation factor, tortuosity and saturation exponent. Archie determines these factors based on lab results in sandstone and provides fixed value for them. Carbonate reservoirs have a variety of textures, shapes and distribution of pores; therefore, the mentioned factors, especially cementation are not considered constant. In this study, the relationship between cementation factor and density log was examined because cementation factor is defined as a parameter that has a close relationship with density. By calculating the matrix density and accordance factor between the matrix density and cementation factor from core’s analysis, a log will be generated that can estimate the variation of cementation factor around the borehole. This method is useable for calculating the cementation factor in carbonate rocks.


Keywords: Cementation factor, carbonate reservoir, density, new method, exponents.


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How to Cite
Shirazy, A., khayer, keyvan, Shirazi, A., Ansari, A. ., & Hezarkhani, A. . (2020). Cementation exponent estimate in carbonate reservoirs: A new method. Global Journal of Computer Sciences: Theory and Research, 10(2), 66–72. https://doi.org/10.18844/gjcs.v10i2.5894
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