Time/m

Bottomhole pressure

P_w/MPa

Influence radius

R_e/m

Desorption radius

r/m

Theoretical cumulative gas production

Q_L/m³・t⁻¹

Actual

cumulative gas production

Q_S/m³・t⁻¹

Recovery rate

η/%

1

0.831

20.074

11.52

139314.44

1647.08

1.18

6

0.472

49.171

27.55

1013071.66

137187.46

13.54

12

0.334

69.538

38.66

2171867.88

384884.42

17.72

18

0.253

85.167

47.14

3388736.99

719452.65

21.23

24

0.195

98.342

54.27

4643938.07

1083731.93

23.34

30

0.151

109.95

60.55

5927941.83

1448421.36

24.43

36

0.114

120.44

66.21

7235075.67

1881095.72

26.00

42

0.112

130.09

71.40

8441543.77

2355419.48

27.90

48

0.110

139.08

76.24

9647428.96

2872174.28

29.77

54

0.108

147.51

80.77

10853852.19

3431360.12

31.61

60

0.107

155.49

85.06

12060957.68

4032977.00

33.44

66

0.105

163.08

87.61

13268867.60

4677024.92

35.25

72

0.103

170.33

91.22

14477686.91

5363503.88

37.05

78

0.101

177.29

94.67

15687506.82

6092413.88

38.84

84

0.099

183.98

97.98

16898407.42

6863754.92

40.62