Research Article
Nuclear Magnetic Resonance Study on Microstructure and Permeability of Coals of Different Ranks
Table 3
CPMG sequence parameters.
| | Parameter | Value |
| | SW (kHz) | 333.333 | | SF (MHz) | 21 | | O1 (Hz) | 675098.01 | | RFD (ms) | 0.080 | | RG1 (dB) | 15 | | P1 (μs) | 23.00 | | DRG | 3 | | DR | 1 | | TW (ms) | 1500.000 | | NS | 32 | | PRG | 1 | | P2 (μs) | 44.00 | | TE (ms) | 0.202 | | NECH | 10000 |
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