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Table 4 Summary of the electrical properties of the fracture fill (i.e. degree and proportion of mineralisation), Terzaghi-corrected fracture intensity, and image quality

From: Characterisation of the fracture- and karst-controlled geothermal reservoir below Munich from geophysical wireline and well information

Block

Well

Fracture resistivity [%]

Fracture intensity [n m−1]

Image quality [%]

Conductive (open)

Partial (partial)

Resistive (closed)

Mean

Max

IF

BQ

Footwall

Th5

58

13

29

0.66

12.6

17

4

Intermediate block

Th4

53

30

17

0.95

10.3

22

11

Th1

57

27

16

1.15

13.9

24

30

Hanging-wall

Th6

53

25

22

1.49

17.0

9

13

Th2a

54

30

15

1.24

15.5

7

50

  1. IF = intensely fractured, BQ = bad quality