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Table 1 Mean calculated thermal conductivities λ and heat flow densities q for the various intervals in the GRT-1, GPK-1 and GPK-2 geothermal wells

From: Heat flow density estimates in the Upper Rhine Graben using laboratory measurements of thermal conductivity on sedimentary rocks

Well

Interval

Mean T (°C)

∆T/∆z (°C/100 m)

Dry

Hot

Wet

Mean λ (W/mK)

Mean q (mW/m2)

Mean λ (W/mK)

Mean q (mW/m2)

Mean λ (W/mK)

Mean q (mW/m2)

GRT-1

Global

92.54

9.07

1.35 ± 0.20

122 ± 19

1.20 ± 0.18

109 ± 18

1.81 ± 0.19

164 ± 20

Tertiary

71.59

9.32

1.25 ± 0.24

117 ± 24

1.20 ± 0.24

112 ± 24

1.71 ± 0.23

159 ± 24

Jurassic

132.30

9.69

1.49 ± 0.04

144 ± 18

1.22 ± 0.05

118 ± 16

1.90 ± 0.05

184 ± 22

Keuper

153.25

7.03

1.77 ± 0.07

125 ± 31

1.15 ± 0.07

81 ± 22

2.27 ± 0.08

160 ± 39

GPK-1

Global

64.49

10.13

1.40 ± 0.24

141 ± 26

1.25 ± 0.21

126 ± 23

1.85 ± 0.23

188 ± 26

Tertiary

46.02

10.08

1.25 ± 0.30

126 ± 32

1.23 ± 0.30

124 ± 32

1.71 ± 0.29

172 ± 32

Jurassic

83.07

12.46

1.50 ± 0.05

187 ± 22

1.32 ± 0.06

165 ± 21

1.91 ± 0.05

238 ± 25

Keuper

101.54

8.37

1.85 ± 0.06

155 ± 24

1.22 ± 0.06

102 ± 17

2.32 ± 0.09

194 ± 31

GPK-2

Global

62.34

10.14

1.33 ± 0.26

135 ± 29

1.26 ± 0.25

127 ± 27

1.78 ± 0.25

181 ± 28

Tertiary

49.00

9.78

1.25 ± 0.31

123 ± 33

1.23 ± 0.32

120 ± 33

1.71 ± 0.31

167 ± 33

Jurassic

87.60

11.82

1.50 ± 0.05

177 ± 21

1.32 ± 0.06

157 ± 20

1.90 ± 0.05

225 ± 25

Keuper

100.95

8.81

1.82 ± 0.10

160 ± 63

1.31 ± 0.07

115 ± 45

2.26 ± 0.12

199 ± 77

  1. Mean measured temperatures and temperature gradients are given for the various intervals [global (from surface to top of the Muschelkalk), Tertiary, Jurassic and Keuper]. Data for dry rocks at ambient temperature (dry), dry rocks at in situ temperature (hot) and saturated rocks at ambient temperature (wet)
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