Study of cement stone with micro-cement corrosion resistance

UDK: 622.245.422.2
DOI: 10.24887/0028-2448-2017-2-54-56
Key words: oil-well, cement slurry, micro-cement, cement stone corrosion
Authors: D.Iu. Rusinov, A.A. Melekhin (Perm National Research Polytechnic University, RF, Perm)

For reliable and durable design of the oil well the integrity of the stone cement under conditions of long-term exposure of formation waters corrosion should be provided. One of the effective methods for decreasing corrosion failure of cement stone is reducing the cement stone permeability by filling the space between the cement particles with sealants.

The article describes results of the study of cement stone with micro-cement resistance to corrosion aged in tanks with corrosive environment for two years. Because of the complex chemical composition of formation water it is not possible to describe the mechanism of rock destruction due to interference of individual ions, therefore, in practice the predominant type of corrosion is evaluated and studded on the single-component solutions in tanks and autoclaves. Samples were kept in tanks with 5% sodium chloride brine (NaCl), with 5% magnesium sulfate solution (MgSO4), with a 5% magnesium chloride solution (MgCl2), 5% sodium sulfate solution (Na2SO4) and formation water from Padunskie oilfield Perm region, and also in the tank with fresh water to benchmarks.

The results of two years laboratory studies show that the of the use of micro-cement to protect the well casing from the corrosive influence of sodium chloride and magnesium sulfate is expedience. The loss of samples strength with micro-cement and without it in sodium sulphate and sodium chloride solutions are almost the same, but cement stone with micro-cement is better in other equal conditions because of high-strength. It can be stated that the cement stone structure influences on its resistance to corrosion. The durability of the well casing could be increased by reducing the contact area between cement stone and corrosive environment and reducing the porosity and permeability.

References

1. Nikolaev N.I., Lyu Kh., Kozhevnikov E.V., Issledovanie vliyaniya polimernykh

bufernykh zhidkostey na prochnost kontakta tsementnogo kamnya s porodoy

(In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo

universiteta. Geologiya. Neftegazovoe i gornoe delo = Bulletin of

Perm National Research Polytechnic University. Geology. Oil & Gas Engineering

& Mining, 2016, V. 15, no. 18, pp. 1622, DOI 10.15593/2224-9923/2016.18.2.

2. Melekhin A.A., Krysin N.I., Tretyakov E.O., Analysis of factors affecting the

life time period of cement stone behind a casing string (In Russ.),

Neftepromyslovoe delo, 2013, no. 9, pp. 7782.

3. Kunitskikh A.A., Research and development of expansion agents for

grouting mortars (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo

politekhnicheskogo universiteta. Geologiya. Neftegazovoe

i gornoe delo = Bulletin of Perm National Research Polytechnic University.

Geology. Oil & Gas Engineering & Mining, 2015, V. 14, no. 16, pp. 4653,

DOI: 10.15593/2224-9923/2015.16.5.

4. Nikolaev N.I., Kozhevnikov E.V., Enhancing the cementing quality of the

well with horizontal profile (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe

i gornoe delo = Bulletin of Perm National Research Polytechnic University.

Geology. Oil & Gas Engineering & Mining, 2014, V. 13, no. 11,

pp. 2936, DOI: 10.15593/2224-9923/2014.11.3.

5. Merzlyakov M.Yu., Yakovlev A.A., Research of technological properties

of aerated grouting mortars with hollow aluminosilicate microspheres (In

Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo

universiteta. Geologiya. Neftegazovoe i gornoe delo = Bulletin of

Perm National Research Polytechnic University. Geology. Oil & Gas Engineering

& Mining, 2015, V. 14, no. 14, pp. 1317, DOI: 10.15593/2224-

9923/2015.14.2.

6. Ashrafyan M.O. et al., Sovremennye tekhnologii i tekhnicheskie sredstva

dlya krepleniya neftyanykh i gazovykh skvazhin (Modern technologies and

facilities for oil and gas well casing), Krasnodar: Prosveshchenie Yug Publ.,

2003, 368 p.

7. Brandl A., Cutler J., Seholm A. et al., Cementing solutions for corrosive

well environments, SPE 132228-MS, 2010.

8. Bulatov A.I., Corrosion of the cement stone in the well (In Russ.), Burenie i

neft, 2016, no. 5, pp. 2731.

9. Samsonenko A.V., Simonyants S.L., Dvukraev K.S. et al., Data of studies of

cement stone stability against corrosion in aggressive media (In Russ.),

Stroitelstvo neftyanykh i gazovykh skvazhin na sushe i na more, 2011, no. 1,

pp. 4143.

10. Dorovskikh I.V., Substantiation of application and development of corrosion-

resistant oil well cements with the condensed solid phase for well site

construction (In Russ.), Stroitelstvo neftyanykh i gazovykh skvazhin na

sushe i na more, 2011, no. 5, pp. 3436.

11. Gazizov Kh.V., Akhmatdinov F.N., Gazitov Sh.Kh., Corrosion stability of

backfill compositions in the formation water (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 2009, no. 8, pp. 2425.

12. Akhrimenko V.E., Akhrimenko Z.M., Pashchevskaya N.V., Timofeeva

I.Yu., Effect of silica-containing additives nature on cement stone corrosion

resistance (In Russ.), Stroitelstvo neftyanykh i gazovykh skvazhin na sushe i

na more, 2012, no. 7, pp. 4446.

13. Kunitskikh A.A., Chernyshov S.E., Rusinov D.Yu., Influence of mineral additives

on the strength characteristics of the cement stone (In Russ.),

Neftyanoe khozyaystvo = Oil Industry, 2014, no. 8, pp. 2023.

14. Storchak A.V., Melekhin A.A., Development of plugging compositions

based on fine-grained cement (In Russ.), Stroitelstvo neftyanykh i

gazovykh skvazhin na sushe i na more, 2011, no. 8, pp. 5153.

15. Kozhevnikov E.V., Study of properties of cement slurries for horizontal

well and sidetrack cementing (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe

i gornoe delo = Bulletin of Perm National Research Polytechnic University.

Geology. Oil & Gas Engineering & Mining, 2015, V. 14

For reliable and durable design of the oil well the integrity of the stone cement under conditions of long-term exposure of formation waters corrosion should be provided. One of the effective methods for decreasing corrosion failure of cement stone is reducing the cement stone permeability by filling the space between the cement particles with sealants.

The article describes results of the study of cement stone with micro-cement resistance to corrosion aged in tanks with corrosive environment for two years. Because of the complex chemical composition of formation water it is not possible to describe the mechanism of rock destruction due to interference of individual ions, therefore, in practice the predominant type of corrosion is evaluated and studded on the single-component solutions in tanks and autoclaves. Samples were kept in tanks with 5% sodium chloride brine (NaCl), with 5% magnesium sulfate solution (MgSO4), with a 5% magnesium chloride solution (MgCl2), 5% sodium sulfate solution (Na2SO4) and formation water from Padunskie oilfield Perm region, and also in the tank with fresh water to benchmarks.

The results of two years laboratory studies show that the of the use of micro-cement to protect the well casing from the corrosive influence of sodium chloride and magnesium sulfate is expedience. The loss of samples strength with micro-cement and without it in sodium sulphate and sodium chloride solutions are almost the same, but cement stone with micro-cement is better in other equal conditions because of high-strength. It can be stated that the cement stone structure influences on its resistance to corrosion. The durability of the well casing could be increased by reducing the contact area between cement stone and corrosive environment and reducing the porosity and permeability.

References

1. Nikolaev N.I., Lyu Kh., Kozhevnikov E.V., Issledovanie vliyaniya polimernykh

bufernykh zhidkostey na prochnost kontakta tsementnogo kamnya s porodoy

(In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo

universiteta. Geologiya. Neftegazovoe i gornoe delo = Bulletin of

Perm National Research Polytechnic University. Geology. Oil & Gas Engineering

& Mining, 2016, V. 15, no. 18, pp. 1622, DOI 10.15593/2224-9923/2016.18.2.

2. Melekhin A.A., Krysin N.I., Tretyakov E.O., Analysis of factors affecting the

life time period of cement stone behind a casing string (In Russ.),

Neftepromyslovoe delo, 2013, no. 9, pp. 7782.

3. Kunitskikh A.A., Research and development of expansion agents for

grouting mortars (In Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo

politekhnicheskogo universiteta. Geologiya. Neftegazovoe

i gornoe delo = Bulletin of Perm National Research Polytechnic University.

Geology. Oil & Gas Engineering & Mining, 2015, V. 14, no. 16, pp. 4653,

DOI: 10.15593/2224-9923/2015.16.5.

4. Nikolaev N.I., Kozhevnikov E.V., Enhancing the cementing quality of the

well with horizontal profile (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe

i gornoe delo = Bulletin of Perm National Research Polytechnic University.

Geology. Oil & Gas Engineering & Mining, 2014, V. 13, no. 11,

pp. 2936, DOI: 10.15593/2224-9923/2014.11.3.

5. Merzlyakov M.Yu., Yakovlev A.A., Research of technological properties

of aerated grouting mortars with hollow aluminosilicate microspheres (In

Russ.), Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo

universiteta. Geologiya. Neftegazovoe i gornoe delo = Bulletin of

Perm National Research Polytechnic University. Geology. Oil & Gas Engineering

& Mining, 2015, V. 14, no. 14, pp. 1317, DOI: 10.15593/2224-

9923/2015.14.2.

6. Ashrafyan M.O. et al., Sovremennye tekhnologii i tekhnicheskie sredstva

dlya krepleniya neftyanykh i gazovykh skvazhin (Modern technologies and

facilities for oil and gas well casing), Krasnodar: Prosveshchenie Yug Publ.,

2003, 368 p.

7. Brandl A., Cutler J., Seholm A. et al., Cementing solutions for corrosive

well environments, SPE 132228-MS, 2010.

8. Bulatov A.I., Corrosion of the cement stone in the well (In Russ.), Burenie i

neft, 2016, no. 5, pp. 2731.

9. Samsonenko A.V., Simonyants S.L., Dvukraev K.S. et al., Data of studies of

cement stone stability against corrosion in aggressive media (In Russ.),

Stroitelstvo neftyanykh i gazovykh skvazhin na sushe i na more, 2011, no. 1,

pp. 4143.

10. Dorovskikh I.V., Substantiation of application and development of corrosion-

resistant oil well cements with the condensed solid phase for well site

construction (In Russ.), Stroitelstvo neftyanykh i gazovykh skvazhin na

sushe i na more, 2011, no. 5, pp. 3436.

11. Gazizov Kh.V., Akhmatdinov F.N., Gazitov Sh.Kh., Corrosion stability of

backfill compositions in the formation water (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 2009, no. 8, pp. 2425.

12. Akhrimenko V.E., Akhrimenko Z.M., Pashchevskaya N.V., Timofeeva

I.Yu., Effect of silica-containing additives nature on cement stone corrosion

resistance (In Russ.), Stroitelstvo neftyanykh i gazovykh skvazhin na sushe i

na more, 2012, no. 7, pp. 4446.

13. Kunitskikh A.A., Chernyshov S.E., Rusinov D.Yu., Influence of mineral additives

on the strength characteristics of the cement stone (In Russ.),

Neftyanoe khozyaystvo = Oil Industry, 2014, no. 8, pp. 2023.

14. Storchak A.V., Melekhin A.A., Development of plugging compositions

based on fine-grained cement (In Russ.), Stroitelstvo neftyanykh i

gazovykh skvazhin na sushe i na more, 2011, no. 8, pp. 5153.

15. Kozhevnikov E.V., Study of properties of cement slurries for horizontal

well and sidetrack cementing (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe

i gornoe delo = Bulletin of Perm National Research Polytechnic University.

Geology. Oil & Gas Engineering & Mining, 2015, V. 14



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