Novel stress sensitivity of pore-size distribution based porosity-permeability models in unconventional rocks

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Figure 2. Stress-dependent porosity and permeability of the sandstone and shale samples. (a) Porosity of SD-1 and SD-2. (b) Permeability of SD-1 and SD-2. (c) Porosity of SH-1 and SH-2. (d) Permeability of SH-1 and SH-2. Figure 3. T2 maps of four samples under different effective confining pressures (a) SD-1 shows continuous trimodal bimodal characteristics. (b) SD-2 show continuous bimodal characteristics. (c) SH-1 shows independent bimodal characteristics. (d) SH-2 shows weak bimodal characteristics. Figure 4. Comparison of the predicted porosity (a) and permeability (b) by the improved models, McKee's models and the measured results.

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