Table 3 L4 3 Basic nuclear magnetic parameters of rock samples.

From: Characterization of coal reservoir permeability evolution under thermo-mechanical coupling based on fractal theory

Parametric

Coal sample

DFS-2

DFS-3

DFS-4

Average value

ϕNMR

17.79%

22.06%

22.30%

20.72%

Bound fluid porosity

16.15%

19.15%

19.18%

18.16%

Bound fluid saturation (BVI)

90.78%

86.81%

86.01%

87.86%

Movable Fluid Porosity

1.64%

2.91%

3.12%

2.56%

Movable fluid saturation (FFI)

9.13%

13.19%

13.99%

12.14%

T2cut-off

7.32 ms

6.83 ms

6.82 ms

6.99 ms

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