Geophysics and Geophysical Exploration ISSN:1229-1064(Print) 2384-051X(Online) 지구물리와 물리탐사

As the permeability is an important parameter to characterize the ease with which a porous medium transmitsfluids, it is usually obtained by fluid flow experiment using core samples. In order to measure the permeability, however,an experimental apparatus is required and it might take long measurement time, especially for tight samples. In this study,the relationship between permeability and porosity as well as drying rate has been investigated to predict the permeabilitywithout a series of measuring experiments. Porosity is measured by drying monitoring method, which measures weightvariation continuously while drying surface-dried saturated sample, and drying rate is obtained from weight variation ratiowith respect to the water saturation. The total of 6 Berea sandstone samples, which have a permeability range of 70 to670 mD, were used in this work, and a new and empirical equation which could predict permeability of porous sandstoneby using porosity and drying rate were obtained through regression analysis.