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Geothermal Energy

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Table 1 Chemical composition of G-grade oil well cement determined by XRF. (wt%)

From: Calculation model and influence factors of thermal conductivity of composite cement-based materials for geothermal well

Composition

Oxides

Minerals

CaO

SiO2

Fe2O3

Al2O3

MgO

K2O

Na2O

C3S

C2S

C3A

C4AF

Average

63.32

21.0

5.98

4.28

1.99

0.21

0.14

55.14

18.62

1.13

18.18

Maximum

63.49

21.4

6.07

4.37

2.05

0.26

0.19

55.61

19.01

1.22

18.36

Minimum

63.18

20.5

5.86

4.21

1.91

0.18

0.11

54.88

18.28

1.05

17.85

Standard deviation

0.16

0.46

0.11

0.08

0.07

0.04

0.04

0.41

0.37

0.09

0.29

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