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
Table 1
Petrographic characteristics of the rock samples investigated in this study.
Sample number
Lithology
Macroscopic
Petrographic characteristics
JH-Y
Shale
Brown laminar shale
JH-S
Sandstone
Caesious sandstone with good gradation and fine psephicity of grains
NT-Y1
Shale
Dark grey laminated silty shale
NT-Y2
Grey laminated silty shale
NT-Y3
Brown laminated silty shale
NT-M1
Mudstone
Gray massive mudstone
NT-M2
Gray massive mudstone
NT-M3
Yellow-gray massive mudstone
NT-M4
Gray massive mudstone
NT-M5
Dark gray massive mudstone
NT-M6
Gray massive mudstone
NT-S
Sandstone
Grey white fine-grained sandstone with good gradation of detrital grains