with k, S, and   \(\tau\) are permeability (Darcy), specific surface area (1/mm), and tortuosity respectively. The permeability obtained is inversely proportional to the grain size. The larger the grain size: the higher the permeability. The permeability of sample A, which has the largest grain size, is 613.89 Darcy, Sample B and Sample C have 193.93 Darcy and 127.48 Darcy respectively. These samples have relatively high permeability, especially Sample A. The permeability is in accordance with several previous studies (Sparlin 1974; Gurley, Copelang and Hendrick 1977; Cocales 1992).