Table 1 Coal petrographic analysis, macerals, industrial composition and total sulfur determination results of carboniferous Benxi formation in well Q36.

From: Coal-forming sedimentary model and its control on vertical reservoir heterogeneity of the upper carboniferous Benxi formation in Ordos basin, China

Samples

Depth (m)

Coal type

Maceral compositions/%

Proximate analysis/%

 

Total sulfur/%

Liptinite

Vitrinite

Inertinite

Mineral

Fixed carbon

Ash

Volatiles

Total sulfur

Sulphur in sulphate

Sulphur in iron sulfide

Organic sulfur

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Q36-1

2803.1

Parting

0.33

79

4.67

16

33.58

45.51

28.23

0.33

0.02

0.01

0.3

Q36-2

2803.5

Semibright coal

n.d.

91

8

1

83.82

6.97

9.3

4.88

0.4

0.01

4.47

Q36-3

2804.6

Semibright ~ bright coal

0.33

92.67

6.33

0.67

74.6

16.78

9.67

4.56

0.04

0.01

4.51

Q36-4

2805.34

Bright coal

n.d.

95

3.33

1.67

85.01

5.81

9.15

4.92

0.4

0.03

4.49

Q36-5

2806.78

Bright coal

n.d.

91.67

2.67

5.67

85.42

6.1

8.42

5.19

0.18

0.15

4.86

Q36-6

2807.62

Bright coal

n.d.

79.67

14

6.33

88.62

2.68

8.43

6.01

0.52

0.03

5.46

Q36-7

2808.57

Semibright coal

n.d.

63.33

32.33

4.33

80.89

10.3

9.31

5.99

1.41

1.09

3.49

Q36-8

2810.09

Bright coal

n.d.

84

8

8

78.31

13.36

9.05

4.17

0.35

0.01

3.81

Q36-9

2811.59

Semibright coal

n.d.

50.33

23.67

26

58.22

31.8

14.26

3.42

0.15

0.13

3.14

Q36-10

2811.87

Bright coal

n.d.

60

14.67

25.33

78.42

12.32

10.16

6.05

0.12

1.36

4.57

Q36-11

2812.6

Semibright coal

n.d.

61

7.67

31.33

53.61

36.07

15.69

3.41

0.03

0.43

2.95

Q36-12

2812.9

Semibright coal

n.d.

59.33

23.33

17.33

66.58

23.48

12.56

5.75

0.02

1.85

3.88

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