Laboratory study of core samples. Porosity determination by different methods

Abstract

This study presents the series of experiments to determine porosity of coal samples using three methods: Connected porosity based on the fluid saturation method, surface porosity from the surface of polished sections under ultraviolet light using Mineral-7 analyzer; total porosity by tomographic method with the MST-05 NMR relaxometer. The porosity analysis reveals that the conventional method yields essentially lower results. Correct estimation of porosity (connected and total) requires integration of the above-listed methods, with an emphasis laid on one of them depending on further applications of these characteristics.