Table 1 Well test and in-situ stress measurement parameters statistics of main coal-bearing synclines in Liupanshui area.

From: Critical depth prediction based on in-situ stress and gas content model of deep coalbed methane in Liupanshui Coalfield in China

Coal bearing syncline basin

H(m)

Pb(MPa)

Gb(MPa/hm)

Pc(MPa)

Gc(MPa/hm)

Pp(MPa)

Gp(MPa/hm)

δH(MPa)

δh(MPa)

δv(MPa)

Panguan

315–978

8.91–19.99

(13.77)

1.37–2.88

(2.11)

8.00-17.27

(12.25)

1.12–2.63

(1.88)

3.03–10.83

(6.24)

0.63–1.31

(0.96)

8.63–25.36

(16.72)

8.00-17.27

(12.25)

8.50-26.42

(17.67)

Qingshan

145.5–876

7.38–20.83

(13.31)

1.53–3.57

(2.39)

6.32–17.53

(11.69)

1.35–2.96

(2.11)

2.45–8.78

(5.73)

0.97–1.14

(1.04)

9.13–22.98

(16.21)

6.32–17.53

(11.69)

3.92–23.65

(15.33)

Yangmeishu

580–806

9-16.68

(12.78)

1.55–2.07

(1.88)

8.35–14.92

(11.37)

1.44–1.85

(1.67)

6.25–7.62

(6.94)

0.95–1.20

(1.05)

9.1-20.46

(14.40)

8.35–14.92

(11.37)

15.66–21.76

(18.14)

Dahebian

579.4-1017.1

12.6–26.8

(16.86)

2.04–2.64

(2.23)

12.44–23.21

(15.87)

1.84–2.38

(2.09)

6.67–14.95

(8.92)

1.05–1.50

(1.19)

16.59–28.28

(21.81)

12.44–23.35

(15.87)

15.64–27.46

(20.23)

Tucheng

319.4-1207.3

9.4-25.26

(15.21)

1.8–3.4

(2.31)

7.73–21.2

(13.13)

1.57–2.99

(1.99)

3.19–12.35

(7.37)

0.75–1.40

(1.07)

10.12–28.77

(16.81)

7.73–21.2

(13.13)

8.62–32.60

(18.36)

Liuzhi

291.5-964.1

5.55–21.41

(11.67)

1.61–2.57

(2.11)

4.48–17.52

(9.71)

1.30–2.28

(1.79)

2.34–8.11

(4.47)

0.64–0.94

(0.79)

5.42–23.04

(13.0)

4.51–17.52

(9.71)

7.87–26.03

(14.86)

Average

145.5-1207.3

5.55–26.8

(14.2)

1.37–3.57

(2.22)

4.48–23.21

(12.63)

1.12–2.99

(1.98)

2.29–14.95

(6.63)

0.63–1.50

(1.02)

5.42–28.77

(17.05)

4.51–23.35

(12.71)

3.92–32.60

(17.55)

  1. Note: H, burial depth, m; Pb, breakdown pressure, MPa; Gb, breakdown pressure gradient, MPa/hm; Pc, closure pressure, MPa; Gc, closure pressure gradient, MPa/hm; Pp, pore pressure, MPa; Gp, pore pressure gradient, MPa/hm; P, Reservoir permeability, mD. Table body data format used, minimum value - maximum value (average value).
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