Figure 14.
The image features four scatter plots arranged in a two by two grid format. Each plot presents a different analysis involving sample average porosity against either sample average saturation degree or equivalent gas permeability. The left column includes plots a and c, with plot a showing the correlation between sample average porosity and sample average saturation degree, and plot c representing the relationship between sample average porosity and equivalent gas permeability. Each plot’s data points are colour coded based on sample size categories, blue for 10 by 10 square millimetres, orange for 20 by 20 square millimetres, green for 40 by 40 square millimetres, and red for 80 by 80 square millimetres. The right column consists of plots b and d, following similar data arrangements for both measures. The axes are clearly labelled with numerical ranges, providing context for the data presented.Correlation of sample average porosity (a) with sample saturation degree and (c) with equivalent gas permeability for different sample sizes under condition HP2D; (b) with sample saturation degree and (d) with equivalent gas permeability for different sample sizes under condition LP2D. The sample average porosity is defined as the ratio of the total void volume within the sample to the total volume of the sample. For each sample size, 2000 realisations are conducted with the same random field parameters