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 6

Comparison of MIP porosity, total pore volume, and median pore diameter averages among different lithologic groups of JH and NT coal mines (JH-Y: shale of JH; JH-S: sandstone of JH; NT-Y: shale of NT; NT-M: mudstone of NT; NT-S: sandstone of NT).