Skip to main content

Science – Society – Technology

Table 1 Experiments with their measured initial and final pH-values

From: Evaluating efficiency and stability of calcite scaling inhibitors at high pressure and high temperature in laboratory scale

Measurement conditions

Inhibitor concentration (ppm)

Initial pH-value

Final pH-value

ΔpH

HPHT

0

10.00

8.47

− 1.53

HPHT

10

10.12

9.21

− 0.91

HPHT

25

9.95

9.29

− 0.66

HPHT

50

10.10

9.57

− 0.53

HPHT

100

9.48

9.03

− 0.45

Ambient

0

8.96

7.73

− 1.23

Ambient

2

9.11

8.77

− 0.34

Ambient

5

8.93

8.82

− 0.11

Ambient

10

9.14

9.05

− 0.09