The Comparison of Experimental Relative Permeability Data with Corey’s Model Results: A Case Study

Using Corey model for determining relative permeability in a two-phase flow in porous media has been a remarkable achievement; however, determining the correct exponents for relative permeability to oil and water still remains a challenge. In addition, laboratory obtained relative permeability data is very essential because it is more reliable despite being tedious and expensive. In this work, laboratory relative permeability values were obtained with exponents of 3.39 and 3.22 for Kro and Krw respectively as against the closest Corey exponents of 3.3 and 3.2 for Kro and Krw respectively. These results and the assumed Corey exponents of 3.5 and 3.1 for Kro and Krw respectively selected in error were used to show how seemingly insignificant errors in Corey exponents can be magnified when used for calculations in reservoir studies. Therefore, in this study obtaining laboratory relative permeability data is emphasized since it captures most rock properties that affect relative permeability which Corey models do not consider.