Skip to main content

Science – Society – Technology

Table 4 Pore pressure calibration table and modeling rationale

From: RETRACTED ARTICLE: Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the Geretsried GEN-1 deep geothermal well

#

Clay content of Yang and Aplin (2010), or KT (Eq. 2)

Average deviation (g/cm3)

Comment

Chattian

Rupelian

Lat./San.

U. Cret.

1

40%

40%

KT

KT

− 0.48

Too low → Chattian or Rupelian clay content > 40%

2

70%

70%

KT

KT

0.01

Good

3

90%

90%

KT

KT

0.34

Too high

4

40%

70%

KT

KT

− 0.41

Too low → Chattian and Rupelian clay content > 40%

Decision: Chattian and Rupelian clay content ≥ 70%

5

70%

70%

70%

70%

− 0.37

Too low

6

70%

70%

70%

90%

− 0.29

Too low

7

70%

70%

70%

KT

− 0.09

Good

8

70%

70%

90%

70%

− 0.34

Too low

9

70%

70%

90%

90%

− 0.26

Too low

10

70%

70%

90%

KT

− 0.08

Good

11

70%

70%

KT

70%

− 0.11

Good

12

70%

70%

KT

90%

− 0.08

Good

13

70%

90%

90%

90%

− 0.20

Too low

14

70%

90%

90%

KT

0.01

Good

15

70%

90%

KT

90%

− 0.03

Good

16

70%

90%

KT

KT

0.08

Good

17

90%

90%

90%

90%

− 0.01

Good

18

90%

90%

90%

KT

0.16

Too high

19

90%

90%

KT

90%

0.27

Too high

Sensitivity study → Lat./San. and/or U. Cret. clay content = 40%

20

90%

90%

40%

40%

− 0.17

Too low → Lat./San. or U. Cret. clay content > 40%

21

90%

90%

40%

KT

0.12

Good

22

90%

90%

KT

40%

0.21

Too high

23

70%

70%

KT

40%

− 0.13

Good

24

70%

90%

40%

KT

− 0.02

Good

25

70%

70%

40%

KT

− 0.10

Good