Table 5 Average organic and inorganic fluid chemistry of MB sites (\(\hbox {mg}\,\hbox {L}^{-1}\) and \(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\)), DOC (\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\)) from production side samples

No. of samples

2 (10)

2 (3)

4 (5)

5

2 (8)

1

1

2

Depth (m)

2250

2300

3443

3443

3446

3014

3882

4083

Temperature (\(^{\circ }\hbox {C}\))

65

106

107

107

123

76

135

130

Water type

Na–Ca–\(\hbox {HCO}_{3}\)–Cl

Na–\(\hbox {HCO}_{3}\)–Cl

Na–\(\hbox {HCO}_{3}\)–Cl

Na–\(\hbox {HCO}_{3}\)–Cl

Na–\(\hbox {HCO}_{3}\)–Cl

n.m

n.m

n.m

TDS

600

1300

900

n.m

\(< 1000\)

n.m

n.m

n.m

Cl

82.3 (71.5)

172 (164)

266.6 (273.8)

259.6

101.6 (109.2)

71.3

221

170

F

2.05 (2.19)

5.84

3.68

3.88

4.63 (4.74)

n.m

n.m

6.38

Br

n.m (0.29)

n.m

3.66 (3.68)

0.9

n.m (0.63)

n.m

n.m

2.37

\(\hbox {SO}_{4}\)

22.17 (9.36)

5.62

34.57 (36.19)

20.38

29.45 (26.68)

n.m

n.m

39.7

DOC

0.35 (0.55)

0.85 (0.77)

10.45

7.86

2.1 (2.54)

0.7

30.1

2.8

Formate

(\(\hbox {mg}\,\hbox {L}^{-1}\))

\(< 0.1\) (0.1)

0.2 (0.15)

1.23 (1.15)

0.83

0.25 (0.31)

0.1

2.7

0.29

(\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\))

(0.03)

0.05 (0.04)

0.33 (0.3)

0.22

0.07 (0.08)

0.03

0.72

0.08

Acetate

(\(\hbox {mg}\,\hbox {L}^{-1}\))

n.d

0.55 (0.5)

12.58 (12.04)

10.32

2.44 (3.26)

0.3

11.6

5.01

(\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\))

n.d

0.22 (0.20)

5.11 (4.89)

4.19

0.99 (1.33)

0.12

4.72

2.04

Propionate

(\(\hbox {mg}\,\hbox {L}^{-1}\))

n.d

n.d

2.37 (2.37)

2.64

0.43 (0.6)

n.d

0.1

0.78

(\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\))

n.d

n.d

1.17 (1.17)

1.3

0.21 (0.3)

n.d

0.05

0.38

Butyrate

(\(\hbox {mg}\,\hbox {L}^{-1}\))

n.d

n.d

0.55 (0.56)

0.64

0.12 (0.13)

n.d

n.d

0.22

(\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\))

n.d

n.d

0.3 (0.31)

0.35

0.06 (0.07)

n.d

n.d

0.12

Valerate

(\(\hbox {mg}\,\hbox {L}^{-1}\))

n.d

n.d

0.18 (0.17)

0.18

n.d

n.d

n.d

n.d

(\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\))

n.d

n.d

0.11 (0.1)

0.11

n.d

n.d

n.d

n.d

\(\sum\)LMWOA

(\(\hbox {mg}\,\hbox {L}^{-1}\))

\(< 0.1\) (0.1)

0.75 (0.64)

16.91 (16.29)

14.61

3.24 (4.3)

0.4

14.4

6.3

(\(\hbox {mg}\,\hbox {C}\,\hbox {L}^{-1}\))

0.03

0.27 (0.24)

7.02 (6.77)

6.17

1.33 (1.78)

0.15

5.49

2.62