Zacytuj

Figure 1

CO2 corrosion on a pipe [14].
CO2 corrosion on a pipe [14].

Figure 2

Well configuration. Taken from [18].
Well configuration. Taken from [18].

Figure 3

Corrosion rate against time on a linear scale.
Corrosion rate against time on a linear scale.

Figure 4

Corrosion rate against time on a semi-log scale.
Corrosion rate against time on a semi-log scale.

Figure 5

Stabilised corrosion rates for different kinds of steels in the CO2 vapour phase.
Stabilised corrosion rates for different kinds of steels in the CO2 vapour phase.

Figure 6

Stabilised corrosion rates for different kinds of steels in the CO2 supercritical phase.
Stabilised corrosion rates for different kinds of steels in the CO2 supercritical phase.

Figure 7

Effect of chromium content in steels, for each CO2 phase.
Effect of chromium content in steels, for each CO2 phase.

Figure 8

Effect of chromium and nickel content in steels, for each CO2 phase.
Effect of chromium and nickel content in steels, for each CO2 phase.

Figure 9

Effect of chromium, nickel and molybdenum content in steels, for each CO2 phase.
Effect of chromium, nickel and molybdenum content in steels, for each CO2 phase.

Figure 10

Corrosion rate against the pressure.
Corrosion rate against the pressure.

Figure 11

Corrosion rate versus the temperature.
Corrosion rate versus the temperature.

j.rmzmag-2019-0017.tab.008.w2aab3b8c20b1b7b1ab1b2b2b6Aa

y=0.0088+4533time(2x0time3)etimex03$y=0.0088+\frac{45}{3}\sqrt{\frac{3}{\text{time}}}\left( \frac{2\sqrt{{{x}_{0}}\text{time}}}{3} \right){{e}^{\frac{-\text{time}-{{x}_{0}}}{3}}}$(1): Better curve fit
y=0.0088+6.8etime4.5$y=0.0088+6.8{{e}^{-\frac{\text{time}}{4.5}}}$(2): The best simplified curve approximation

Corrosion rates [37].

P (bar)NaCl (%)Rate (mm/yr)
CQ1CQ2
1.020.560.49
30.450.52
58.890.29
3.021.290.71
31.260.80
51.130.82
6.521.661.11
31.570.96
51.610.92

Corrosion rates [36].

T (°C)PH2S (MPa)PCO2 (MPa)Cl (g/l)S (%)H2O (%)Rate (mm/yr)
600.10.50.132301.56
900.10.50.132301.06
1500.10.50.132301.39
600.10.50.134301.47
900.10.50.134300.78
1500.10.50.134302.08
600.10.50.132601.15
900.10.50.132600.94
1500.10.50.132600.98
600.10.50.134601.10
900.10.50.134600.68
1500.10.50.134601.00

Classification of corrosion rates by steels.

CategorySteels in CO2 vapour phaseSteels in CO2 supercritical phase
P110, 13Cr, Q125, 3Cr, N80, J55, 1Cr, K55P110, N80, J55, 13Cr, 22Cr
Lowandand
22Cr20Cr-25Ni
ModerateT95, C110, Q125 and L80
HighL80

Required chemical composition [21].

Chemical composition in mass fraction (%)
GroupGradeTypeCMnMoCrNiCuPSSi
MinMaxMinMaxMinMaxMinMaxMaxMaxMaxMaxMax
1H400.030.03
J550.030.03
K550.030.03
N8010.030.03
N80Q0.030.03
R950.451.900.030.030.45
2M650.030.03
L8010.431.900.250.350.030.030.45
L809Cr0.150.300.600.901.108.0010.000.500.250.020.011.00
L8013Cr0.150.220.251.0012.0014.000.500.250.020.011.00
C9010.351.200.250.851.500.990.020.01
T9510.351.200.250.850.401.500.990.020.01
C1100.351.200.251.000.401.500.990.020.005
3P1100.020.03
4Q12510.351.350.851.500.990.020.01

Reaction of Fe with the environment.

Reaction nameReaction
Iron–carbonic acid reactionFe+2H2CO3Fe2++2HCO3+H2$Fe+2{{H}_{2}}C{{O}_{3}}\to F{{e}^{2+}}+2HCO_{3}^{-}+{{H}_{2}}$
Iron–bicarbonate reactionFe2++2HCO3Fe(HCO3)2$F{{e}^{2+}}+2HCO_{3}^{-}\to Fe{{\left( HC{{O}_{3}} \right)}_{2}}$
Iron carbonate precipitationFe(HCO3)2FeCO3+CO2+H2O$Fe{{\left( HC{{O}_{3}} \right)}_{2}}\to FeC{{O}_{3}}+C{{O}_{2}}+{{H}_{2}}O$
Fe2+CO32FeCO3$F{{e}^{2-}}+CO_{3}^{2-}\to FeC{{O}_{3}}$

Required mechanical properties [22].

Yield strength (MPa)Minimum tensile strength
GroupGradeTypeElongation (%)MinMax(MPa)
1H400.50276552414
J550.50379552517
K550.50379552655
N8010.50552758689
N80Q0.50552758689
R950.50655758724
2M650.50448586586
L8010.50552655655
L809Cr0.50552655655
L8013Cr0.50552655655
C9010.50621724689
T9510.50655758724
C1100.70758828793
3P1100.60758965862
4Q12510.658621034931

Reaction of CO2 and H2O.

Reaction nameReaction
Carbon dioxide hydrationCO2+H2OH2CO3$C{{O}_{2}}+{{H}_{2}}O\leftrightarrow {{H}_{2}}C{{O}_{3}}$
Carbonic acid dissociationH2CO3H++HCO3${{H}_{2}}C{{O}_{3}}\leftrightarrow {{H}^{+}}+HCO_{3}^{-}$
Bicarbonate anion dissociationHCO3H++CO32$HCO_{3}^{-}\leftrightarrow {{H}^{+}}+CO_{3}^{2-}$

j.rmzmag-2019-0017.tab.009.w2aab3b8c20b1b7b1ab2b2ab1Aa

SteelCO2 phase P(MPa)T (°C)(mm/Rate yr)Reference(Time days)CCrNiMo
3CrVapour0.2450.45[7]70.222.940.30.3
3CrVapour0.2651.03[7]70.222.940.30.3
3CrVapour0.2851[7]70.222.940.30.3
3CrVapour0.21050.99[7]70.222.940.30.3
3CrVapour0.5400.2[7]70.222.940.30.3
3CrVapour0.5600.7[7]70.222.940.30.3
3CrVapour0.5803.45[7]70.222.940.30.3
3CrVapour0.51004.5[7]70.222.940.30.3
13CrVapour31801.71[24]70.02513
13CrVapour31800.225[24]70.0251341
13CrVapour31800.18[24]70.0251342
13CrVapour31800.23[24]70.0251351
13CrVapour31800.15[24]70.0251352
13CrVapour31800.26[24]70.0251341
13CrVapour31800.18[24]70.0251342
13CrVapour1.141300.05[25]490.02130.40.09
13CrVapour1.141300.005[25]490.0212.245.732.1
J55Supercritical8.274800.5[27]40.190.190.0170.092
J55Supercritical8.274800.9[27]40.190.190.0170.092
J55Supercritical8.274807[27]40.190.190.0170.092
J55Supercritical8.2748010.5[27]40.190.190.0170.092
J55Supercritical8.2748012.2[27]40.190.190.0170.092
N80Supercritical8.274800.7[27]40.240.0360.0280.021
N80Supercritical8.274801[27]40.240.0360.0280.021
N80Supercritical8.274807.2[27]40.240.0360.0280.021
N80Supercritical8.2748011[27]40.240.0360.0280.021
N80Supercritical8.2748012.8[27]40.240.0360.0280.021
P110Supercritical8.274801[27]40.260.150.0120.01
P110Supercritical8.274801.7[27]40.260.150.0120.01
P110Supercritical8.2748010[27]40.260.150.0120.01
P110Supercritical8.2748011.2[27]40.260.150.0120.01
P110Supercritical8.2748014.4[27]40.260.150.0120.01
J55Vapour6.89901.854[28]40.190.190.0170.092
J55Vapour1.725800.827[28]40.190.190.0170.092
J55Vapour1.7251000.949[28]40.190.190.0170.092
J55Vapour1.7251200.894[28]40.190.190.0170.092
J55Vapour1.7251400.275[28]40.190.190.0170.092
J55Vapour1.7251600.64[28]40.190.190.0170.092
J55Vapour1.7251800.351[28]40.190.190.0170.092
J55Vapour1.7252000.636[28]40.190.190.0170.092
J55Supercritical10.34901.105[28]40.190.190.0170.092
N80Vapour6.89901.752[28]40.240.0360.0280.021
N80Vapour1.725800.681[28]40.240.0360.0280.021
N80Vapour1.7251001.053[28]40.240.0360.0280.021
N80Vapour1.7251200.814[28]40.240.0360.0280.021
N80Vapour1.7251400.272[28]40.240.0360.0280.021
N80Vapour1.7251600.191[28]40.240.0360.0280.021
N80Vapour1.7252000.322[28]40.240.0360.0280.021
N80Vapour1.7251800.204[28]40.240.0360.0280.021
N80Supercritical10.34900.922[28]40.240.0360.0280.021
P110Vapour6.89902.403[28]40.260.150.0120.01
P110Vapour1.725800.948[28]40.260.150.0120.01
P110Vapour1.7251001.609[28]40.260.150.0120.01
P110Vapour1.7251200.862[28]40.260.150.0120.01
P110Vapour1.7251400.41[28]40.260.150.0120.01
P110Vapour1.7251600.353[28]40.260.150.0120.01
P110Vapour1.7251800.422[28]40.260.150.0120.01
P110Vapour1.7252000.95[28]40.260.150.0120.01
P110Supercritical10.34900.922[28]40.260.150.0120.01
J55Vapour5200.7[29]30.190.0490.0260.007
J55Vapour5406[29]30.190.0490.0260.007
J55Vapour5608[29]30.190.0490.0260.007
J55Vapour5803.9[29]30.190.0490.0260.007
J55Vapour51000.85[29]30.190.0490.0260.007
J55Vapour2800.1[29]30.190.0490.0260.007
J55Supercritical8805.2[29]30.190.0490.0260.007
J55Supercritical10807.2[29]30.190.0490.0260.007
J55Supercritical12806.2[29]30.190.0490.0260.007
N80Vapour5200.7[29]30.240.220.0280.018
N80Vapour5405[29]30.240.220.0280.018
N80Vapour5609[29]30.240.220.0280.018
N80Vapour5803.1[29]30.240.220.0280.018
N80Vapour51002[29]30.240.220.0280.018
N80Vapour2800.1[29]30.240.220.0280.018
N80Supercritical8805.2[29]30.240.220.0280.018
N80Supercritical10807.2[29]30.240.220.0280.018
N80Supercritical12806.2[29]30.240.220.0280.018
P110Vapour5200.8[29]30.2650.9580.0420.35
P110Vapour5405[29]30.2650.9580.0420.35
P110Vapour56010[29]30.2650.9580.0420.35
P110Vapour5804.5[29]30.2650.9580.0420.35
P110Vapour51001.3[29]30.2650.9580.0420.35
P110Vapour2800.2[29]30.2650.9580.0420.35
P110Vapour8805.7[29]30.2650.9580.0420.35
P110Vapour10807.75[29]30.2650.9580.0420.35
P110Vapour12806.4[29]30.2650.9580.0420.35
P110Supercritical8805.7[29]30.2650.9580.0420.35
P110Supercritical10807.75[29]30.2650.9580.0420.35
P110Supercritical12806.4[29]30.2650.9580.0420.35
K55Vapour11700.29[31]7
N80Vapour0.4901.689[32]30.240.0360.0280.021
N80Vapour0.4900.172[32]30.240.0360.0280.021
N80Vapour0.4900.789[32]30.240.0360.0280.021
N80Vapour0.4900.621[32]30.240.0360.0280.021
N80Vapour0.4900.511[32]30.240.0360.0280.021
N80Vapour4900.55[36]50.420.0510.0050.18
N80Vapour4901.25[36]50.420.0510.0050.18
N80Vapour4903.55[36]50.420.0510.0050.18
N80Vapour4904.95[36]50.420.0510.0050.18
L80Vapour4658.5[34]20.30.85
L80Supercritical8659.9[34]20.30.85
L80Supercritical126511[34]20.30.85
L80Vapour4906.1[34]20.30.85
L80Supercritical8903.4[34]20.30.85
L80Supercritical12904.8[34]20.30.85
L80Supercritical15500.375[35]300.3150.040.010.11
L80Supercritical15503.534[35]70.3150.040.010.11
L80Supercritical30502.774[35]70.3150.040.010.11
L80Vapour0.5601.5568[36]300.221.20.5
L80Vapour0.5901.0627[36]300.221.20.5
L80Vapour0.51501.3941[36]300.221.20.5
L80Vapour0.5601.467[36]300.221.20.5
L80Vapour0.5900.7794[36]300.221.20.5
L80Vapour0.51502.0835[36]300.221.20.5
L80Vapour0.5601.1466[36]300.221.20.5
L80Vapour0.5900.9401[36]300.221.20.5
L80Vapour0.51500.9807[36]300.221.20.5
L80Vapour0.5601.0967[36]300.221.20.5
L80Vapour0.5900.6833[36]300.221.20.5
L80Vapour0.51501.0032[36]300.221.20.5
L80Vapour0.1200.56[37]30.170.810.0140.003
L80Vapour0.1200.49[37]30.210.820.0150.031
L80Vapour0.1200.45[37]30.170.810.0140.003
L80Vapour0.1200.52[37]30.210.820.0150.031
L80Vapour0.1200.89[37]30.170.810.0140.003
L80Vapour0.1200.29[37]30.210.820.0150.031
L80Vapour0.3201.29[37]30.170.810.0140.003
L80Vapour0.3200.71[37]30.210.820.0150.031
L80Vapour0.3201.26[37]30.170.810.0140.003
L80Vapour0.3200.8[37]30.210.820.0150.031
L80Vapour0.3201.13[37]30.170.810.0140.003
L80Vapour0.3200.82[37]30.210.820.0150.031
T95Supercritical41.373815[38]70.331.010.030.79
T95Supercritical41.373820[38]70.331.010.030.79
T95Supercritical41.373817[38]70.331.010.030.79
T95Supercritical41.373817.5[38]70.331.010.030.79
Q125Supercritical41.37383.2[38]70.260.910.040.26
Q125Supercritical41.37389.5[38]70.260.910.040.26
Q125Supercritical41.373810[38]70.260.910.040.26
Q125Supercritical41.373810[38]70.260.910.040.26
C110Supercritical41.373813[38]70.31.010.010.78
C110Supercritical41.373814.5[38]70.31.010.010.78
C110Supercritical41.37389[38]70.31.010.010.78
P110Vapour41006.1843[39]50.190.0280.028
P110Vapour41600.8754[39]50.190.0280.028
P110Vapour4900.9394[40]3
P110Vapour41100.4491[40]3
P110Vapour0.11000.64[41]70.260.0280.028
P110Vapour21000.76[41]70.260.0280.028
P110Vapour41000.91[41]70.260.0280.028
P110Vapour61000.83[41]70.260.0280.028
Q125Vapour1301.012[42]70.21.030.20.3
Q125Vapour2300.9[43]70.150.460.20.15
Q125Vapour2602.8[43]70.150.460.20.15
Q125Vapour2903.6[43]70.150.460.20.15
Q125Vapour21202.4[43]70.150.460.20.15
20Cr- 25 NiSupercritical9.5500.0003[44]40.0220254.5
20Cr- 25 NiSupercritical13800.001[44]40.0220254.5
20Cr- 25 NiSupercritical161100.0001[44]40.0220254.5
20Cr- 25 NiSupercritical18.21300.00005[44]40.0220254.5
20Cr- 25 NiSupercritical9.5500.00006[44]40.0220254.5
20Cr- 25 NiSupercritical13.5800.00009[44]40.0220254.5
20Cr- 25 NiSupercritical171100.00011[44]40.0220254.5
20Cr- 25 NiSupercritical21.51300.00005[44]40.0220254.5
13CrSupercritical9.5500.003[44]40.19513
13CrSupercritical13800.0038[44]40.19513
13CrSupercritical161100.009[44]40.19513
13CrSupercritical18.21300.003[44]40.19513
13CrSupercritical9.5500.00033[44]40.19513
13CrSupercritical13.5800.0006[44]40.19513
13CrSupercritical171100.0008[44]40.19513
13CrSupercritical21.51300.0004[44]40.19513
22CrSupercritical9.5500.0007[44]40.032253
22CrSupercritical13800.0008[44]40.032253
22CrSupercritical161100.0004[44]40.032253
22CrSupercritical18.21300.0001[44]40.032253
22CrSupercritical9.5500.00006[44]40.032253
22CrSupercritical13.5800.0001[44]40.032253
22CrSupercritical171100.00014[44]40.032253
22CrSupercritical21.51300.00006[44]40.032253
13CrVapour0.1600.002[45]29.1670.4613.390.130.03
13CrVapour6600.0002[45]29.1670.4613.390.130.03
1CrVapour0.1600.0059[45]29.1670.431.050.040.22
1CrVapour6600.0015[45]29.1670.431.050.040.22
13CrVapour0.2500.1[46]900.02912.785.122.23
22CrVapour0.2500.01[46]900.2322.915.653.21
P110Vapour0.2500.18[46]900.251.060.0250.65
J55Supercritical9.5700.1[47]12.5
J55Supercritical9.5700.1[47]12.5
N80Supercritical9.5700.1[47]12.5
N80Supercritical9.5700.1[47]12.5
J55Supercritical9.5702[47]4.67
J55Supercritical9.5700.2[47]4.67
N80Supercritical9.5701.15[47]4.67
N80Supercritical9.5700.2[47]4.67
J55Vapour0.5653.3[48]20.360.0510.009
J55Vapour1656.7[48]20.360.0510.009
J55Vapour1.5655.9[48]20.360.0510.009
J55Vapour2.5654.7[48]20.360.0510.009
J55Vapour3653.5[48]20.360.0510.009
J55Vapour5653.95[48]20.360.0510.009
J55Vapour7655.2[48]20.360.0510.009
J55Supercritical9655.2[48]20.360.0510.009
J55Supercritical11655.2[48]20.360.0510.009
J55Supercritical13655.2[48]20.360.0510.009
J55Supercritical15655.2[48]20.360.0510.009
J55Vapour5300.09[49]30.380.09
J55Vapour5480.088[49]30.380.09
J55Vapour5550.13[49]30.380.09
J55Vapour5650.148[49]30.380.09
N80Vapour0.5506.5[50]20.330.0130.0260.016
N80Vapour1509.5[50]20.330.0130.0260.016
N80Vapour25012[50]20.330.0130.0260.016
N80Vapour3509.5[50]20.330.0130.0260.016
N80Vapour4509[50]20.330.0130.0260.016
N80Vapour5503.8[50]20.330.0130.0260.016
N80Supercritical10501.8[50]20.330.0130.0260.016
N80Supercritical10658.4[50]20.330.0130.0260.016
N80Supercritical108011.8[50]20.330.0130.0260.016
N80Vapour0.151000.75[51]30.260.1480.0280.028
N80Vapour0.61001.15[51]30.260.1480.0280.028
N80Vapour11002.25[51]30.260.1480.0280.028
N80Vapour41007.2[51]30.260.1480.0280.028
N80Vapour0.1804.65[52]30.190.550.14
3CrVapour0.1802.9[52]30.13.750.25
3CrVapour0.1803.25[52]30.113.30.21
N80Vapour8450.056[53]320.290.240.080.09
L80Vapour1250.2334[54]20.220.013
L80Vapour4250.3905[54]20.220.013
L80Vapour6250.4044[54]20.220.013
L80Vapour1250.254[54]20.220.013
L80Vapour4250.347[54]20.220.013
L80Vapour6250.4681[54]20.220.013
L80Vapour0.1800.13[55]50.430.25
L80Vapour0.1800.13[55]50.430.950.25
L80Vapour0.1800.3[55]50.113.40.150.6
C110Supercritical10.81200.55[56]70.270.040.72
P110Vapour5901.12[57]150.250.150.0320.27
P110Vapour5901.08[57]150.262.990.0430.19
P110Vapour5901.57[57]150.255.110.0410.21
P110Vapour0.51200.03[58]10.260.01
P110Vapour1.51202.23[58]10.260.01
P110Vapour31201.1[58]10.260.01
N80Vapour0.51200.03[58]10.240.021
N80Vapour1.51201.5[58]10.240.021
P110Vapour0.1904.2[59]50.220.180.010.03