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Geoscience Letters

Official Journal of the Asia Oceania Geosciences Society (AOGS)

Table 1 The organic geochemical parameters, mineral composition, porosity, and permeability of shale samples

From: Preservation conditions and potential evaluation of the Longmaxi shale gas reservoir in the Changning area, southern Sichuan Basin

Sample ID

TOC (%)

Ro (%)

Porosity (%)

Permeability (mD)

Mineral composition (%)

Quartz

Feldspar

Calcite

Dolomite

Pyrite

Clay

TCBM

XC-1

9.73

 

8.56

0.00129

74

5

 

3

 

18

82

XC-2

  

4.65

0.0086

       

XC-4

4.46

 

6.11

0.00011

69

5

12

6

 

8

92

XC-5

3.6

   

37

2

23

29

 

9

91

XC-6

3.13

   

38

5

21

25

 

11

89

XC-8

4.03

 

7.63

0.00036

39

4

24

22

 

11

89

XC-10

5.55

 

6.98

0.00168

31

5

11

42

 

11

89

XC-11

1.69

   

36

20

11

12

 

21

79

XC-14

4.28

   

62

8

5

9

2

14

86

XC-15

3.49

 

4.9

0.00159

73

13

   

14

86

D1

4.96

2.35

  

54

13

6

3

5

19

81

D2

4.89

2.46

  

50

17

6

6

4

17

83

D3

2.98

2.28

  

46

22

6

5

3

18

82

D4

2.09

2.81

  

47

25

5

4

2

17

83

D5

1.83

2.84

  

46

31

5

3

1

14

86

D7

2.33

2.61

  

43

33

6

3

1

14

86

  1. TOC is total organic carbon, Ro is the vitrinite reflectance, and TCBM is the total content of brittle minerals
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