عنوان مقاله [English]
There are several correlations used to simulate the miscible displacement process contains multiple parameters; i.e. dispersion, diffusion coefficients and accessible pore volume. Determination of these parameters is of critical importance. There are different methods for determination of accessible pore volumes that is the portion of pore volumes, which contributed to miscible process. The X-Ray and thin section analysis, network modeling, determination of pore size distribution and some statistical methods are commonly used to determine the accessible pore volumes.
In this study the tracer analysis method is developed to determine the accessible pore volume. For this purpose, a series of tracer analysis tests were performed to determine the effluent concentration profile. Using the slope of the concentration profile and the solution of convection-dispersion equation, the accessible pore volume of the porous media can be calculated. To check the results, a series of miscible displacement tests were also conducted. Results show a good agreement between experimental values and analytical solution of the miscible displacement.