Figure 17.
The image features four graphs displaying probability density functions. The top left and bottom left graphs depict the distribution of sample average saturation degree labelled S w with horizontal axes ranging from 0.70 to 1.00. Vertical axes represent probability density. Each graph includes a histogram with grey bars, a red curve indicating the probability density function, a blue solid line for the deterministic value, and a blue dashed line for the mean value. The deterministic value for S w is 0.840 with a mean of 0.833 in the top left graph, while these values are 0.840 and 0.829 in the bottom left graph. The top right and bottom right graphs illustrate the distribution of equivalent gas permeability labelled k g with horizontal axes spanning from 0.0 to 1.0 times 10 to the power of negative 19. Similar features are present in these graphs, with the deterministic value noted as 4.93 times 10 to the power of negative 20 and the mean value as 5.17 times 10 to the power of negative 20 in the top right graph, and deterministic as 4.93 times 10 to the power of negative 20 and mean as 5.92 times 10 to the power of negative 20 in the bottom right graph.Histogram of statistic results for 20 mm sample size: (a) sample average saturation degree and (b) equivalent gas permeability at steady state under condition HP2D; (c) sample average saturation degree and (d) equivalent gas permeability at steady state under condition HP3D