Time/m

Bottomhole pressure Pw/MPa

Influence radius Re/m

Desorption radius

r/m

Theoretical cumulative gas production

QL/m3・t−1

Actual

cumulative gas production

QS/m3・t−1

Recovery rate

η/%

1

1.552

16.84

7.08

54433.648

0

0.00

6

0.503

41.25

20.68

709580

33043.44

4.66

12

0.325

58.35

29.35

1551726.9

139273.06

8.98

18

0.252

71.46

35.82

2406545.1

282351.16

12.10

24

0.210

82.52

41.19

3266204.2

490164.24

15.01

30

0.183

92.26

45.86

4128091.3

694397.2

16.82

36

0.163

101.07

50.04

4991033.1

896396.69

17.96

42

0.148

109.17

53.86

5854416.5

1215320.84

20.76

48

0.136

116.71

57.39

6717891.5

1531593.44

22.80

54

0.126

123.79

60.69

7581245.5

1882333.16

24.83

60

0.118

130.49

63.80

8444344.8

2267540.00

26.85

66

0.111

136.86

66.74

9307103.3

2687213.96

28.87

72

0.105

142.94

69.54

10169464.7

3141355.04

30.89

78

0.100

148.78

72.22

11031392.7

3629963.24

32.91

84

0.096

154.40

74.79

11892863.9

4153038.56

34.92