Parameter

Reservoir

Coal

Shale

n

Ave

n

Ave

n

Ave

Temperature ˚C

130

42

Pressure gradient kPa/m

279

8.2

Water saturation %

99

Crit water saturation %

60

Bottom hole pressure kPa

200

Density g/cc

354

1.4

35

2.2

Langmuir volume cc/g

45

13.7

12

1.5

Langmuir pressure MPa

45

5.7

12

6.2

Matrix perm md

1e−3

1e−5

Diffusion cm2/s

0.05

8e−3

Matrix porosity %a

1e−4

1e−4

Eff fracture spacing m

0.5

10

Max horiz fracture perm md

110

3.8

1e−3

Min horiz fracture perm md

=Kmax/3

=Kmax

Vert fracture perm md

=Kmax/3

=Kmax/10

Fracture porosity %

0.01

1e−4