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 8

spectra of the NMR measurements under the full water-saturated () condition for the investigated samples.
(a) Shale
(b) Mudstone
(c) Sandstone