Abstract

The pore-size distribution of the shales is controlled by the clay content of the shales. The clays have extremely small grain size and high surface area. Na- Montmorrillonite clays obtained from Clay Mineral Society are compacted to obtain pellets of with different porosities. Gas adsorption experiment is carried on powder clays and compacted pellets to understand the evolution of poresize distribution. The results suggest a decrease in pore diameter with compaction. The ultrasonic velocities of the clays are measured and compared with reported value.