Fig. 4
From: A non-invasive method to directly quantify surface heterogeneity of porous materials
Analysis of shale kerogens using generalized Porod’s scattering law method. a Intensity ratio, IR(ρf) = I(Q, ρf)/I(Q, ρf = 0), which is also the ratio of generalized Porod’s scattering constant CGPS(ρf)/CGPS(ρf = 0), for Sample 1 (black squares, least mature kerogen), Sample 2 (red circles), and Sample 3 (blue triangles, most mature kerogen) as a function of \(\rho_{\mathrm{f}} = \rho _{\mathrm {CD}_4}\). b Normalized surface heterogeneity Δ H of the shale kerogens as a function of vitrinite reflectance (R0). The highest methane pressure available in current experiment setup cannot reach the minimum of IR(ρf) for Sample 3 so the approximate Δ H based on the highest pressure measurement is shown (gray open triangle) for Sample 3
