Research Article
Nanoscale Pore Structure Characterization and Permeability of Mudrocks and Fine-Grained Sandstones in Coal Reservoirs by Scanning Electron Microscopy, Mercury Intrusion Porosimetry, and Low-Field Nuclear Magnetic Resonance
Figure 9
Comparisons of NMR PSD curves of typical shale, mudstone, and fine-grained sandstone samples calibrated by the (green line) and weighted arithmetic mean (WAM) (blue line) methods with MIP PSD curves (red line).
(a) Shale (NT-Y3) |
(b) Mudstone (NT-M1) |
(c) Sandstone (NT-S) |