Figure 9.
The image presents a three-dimensional graph illustrating the relationship between gas effective permeability, measured in square metres per kilogram, and two variables: degree of saturation expressed as a percentage, and mean aperture opening measured in square metres. Two sets of test data, labelled as test data 1 in yellow and test data 2 in blue, are represented by two distinct curved lines. The cylinder illustration in the centre demonstrates two paths, labelled path 1 and path 2, through a representation of intact clay, highlighting the interior structure with intermingled blocks. The vertical axis represents the gas effective permeability while the horizontal axes depict degree of saturation and mean aperture opening, respectively. Navigating the graph involves observing the flow of data points plotted in varying increments along the axes.Mean – degree of liquid saturation ( – gas effective permeability ( calibration line for Paths I and II. Same gas permeability functions were used for Models A, B, and C