The application of calcium polysulfide to increase corrosion resistance of the timbering of wells

Автор: Agzamov F.A., Tokunova E.F., Sabirzianov R.R.

Журнал: Nanotechnologies in Construction: A Scientific Internet-Journal @nanobuild-en

Рубрика: Concrete and mortars modified by nanosize additives

Статья в выпуске: 3 Vol.11, 2019 года.

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The cement slurries used in well casing should ensure the tightness of the lining and protect the casing from aggressive formation fluids. At the same time, cement and water based solutions are used for cementing, with a water-cement ratio of 0.45–0.9, which predetermines their high porosity and low corrosion resistance. The technologies for increasing the durability of concrete used in con-struction practice when fixing wells are not acceptable. One of the most aggressive components of reservoir fluids is hydrogen sulfide, depending on thermodynamic conditions, can be both dissolved and gaseous. The analysis of various types of corrosion of cement stone shows the ki-netics is determined by the diffusion of aggressive ions into the stone. To reduce the porosity of the cement stone, calcium polysulfide has been proposed, which can precipitate in the pores of the stone during hardening of the cement slurries, clogging the pores, reducing their size, slowing down the diffusion rate of aggressive ions into the cement stone. In addition, calcium polysulfide adsorbing in the pores on cement hardening products will ensure the inhibition of pore space. Three methods of calcium polysulfide injection into the cement slurries were tested: into the tempering fluid (water), directly into the prepared cement slurry and dry method, through cement powder, which was subsequently subjected to disintegrator treatment. The results of the experiments showed calcium polysulfide make an impact on the rheological properties and pumpability of cement slurries, increasing the strength of the obtained stone and reducing its permeability. The stability of a stone in an acidic environment was estimated by its corrosion by one molar hydrochloric acid. The depth of stone corrosion with increasing concentration of PSS decreased from 30 to 6 mm in 21 days. When testing the cement stone under the action of dissolved hydrogen sulfide for 45 days, it was shown that the increased concentration of calcium polysulfide from 0 to 5% reduced the corrosion depth from 5.0 to 0.3 mm, depending on the technology of adding the reagent. Micrographs of cement stone samples proved that calcium polysulfide, being distributed in the pore space, blocks the surface of the cement stone, limiting the contact of aggressive ions with hardening products.

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Cement stone, hydrogen sulfide, increase in corrosion resistance, calcium poly-sulfide

Короткий адрес: https://readera.org/142227493

IDR: 142227493   |   DOI: 10.15828/2075-8545-2019-11-3-308-324

Список литературы The application of calcium polysulfide to increase corrosion resistance of the timbering of wells

  • Agzamov F.A., Izmuhambetov B.S., Tokunova E.F. Himija tamponazhnyh i promyvochnyh rastvorov [Chemistry of grouting and flushing solutions]. Saint-Petersburg, Nedra, 2011. 268 p. (In Russian).
  • Shmelev P.S. Burenie glubokih skvazhin v uslovijah anomal’nogo vozdejstvija korrozionnoaktivnyh sred [Drilling of deep wells in the conditions of the abnormal influence of corrozive environments]. Moscow, Nauka, 1998. 351 p. (In Russian).
  • Moskvin V.M., Ivanov F.M., Alekseev S.N., Guzeev E.A. Korrozija betona i zhelezobetona, metody ih zashhity [Corrosion of concrete and reinforced concrete, methods of their protection]. Moscow, Strojizdat, 1980. 536 p. (In Russian).
  • Kind V.V. Korrozija cementov i betona v gidrotehnicheskih sooruzhenijah [Corrosion of cements and concrete in hydraulic engineering constructions]. Moscow, Gosjenergoizdat, 1955. 230 p. (In Russian).
  • Mamadzhanov U.D. Korrozija tamponazhnyh cementov v uglekislotnoj srede [Corrosion of grouting cements in the carbon dioxide environment]. Trudy AN UzSSR, otd. tehn. Nauk [Works of academy of Sciences of UZSSR, office of technical science]. 1976. pp. 69–73. (In Russian).
  • Rahimbaev Sh.M., Karpacheva E.N., Tolypina N.M. O vybore tipa cementa na osnove teorii kol’matacii pri slozhnom sostave agressivnoj sredy [About the choice of type of cement on the basis of the theory of a colmatation at the complex structure of a severe atmosphere]. Beton i zhelezobeton [Concrete and reinforced concrete]. 2012. no. 5. pp. 25–26. (In Russian).
  • Rahimbaev Sh.M., Tolypina N.M. Obosnovanie vybora tipa vjazhushhego dlja agressivnyh sred organicheskogo proishozhdenija na osnove teorii geterogennyh fiziko-himicheskih processov [Justification of the choice of type of the organic origin knitting for severe atmospheres on the basis of the theory of heterogeneous physical and chemical processes]. Vestnik Belgorodskogo gosudarstvennogo tehnologicheskogo universiteta im. V.G.Shuhova [Bulletin of the Belgorod state technological university of V.G. Shukhov]. 2016. no. 9. pp. 159–163. (In Russian).
  • Rahimbaev, Sh.M., Tolypina N.M. Povyshenie korrozionnoj stojkosti betonov putem racional’nogo vybora vjazhushhego i zapolnitelej [Increase in rust resistance of concrete by the rational choice knitting and fillers]. – Belgorod: Izd-vo BGTU, 2015. – 321 p. (In Russian).
  • Volgushev.A.N., Paturoev V.V., Putljaev I.E. Krasil’nikova O.M. Primenenie sery dlja propitki porovoj struktury stroitel’nyh materialov [Use of sulfur for impregnation of steam structure of structural materials]. Beton i zhelezobeton [Concrete and reinforced concrete]. 1976. no. II. pp. 38–39. (In Russian).
  • Ignatiev A.V. Povyshenie prochnosti i vodonepronicaemosti rastvorov i betonov propitkoj ih zhidkim steklom [Increase in durability and water tightness of solutions and concrete impregnation by their liquid silica glass]. V kn.: Zhidkoe steklo: Materialy koordinacionnogo soveshhanija po proizvodstvu i prime-neniju zhidkogo stekla v stroitel’stve [In the book.: Liquid silica glass: Materials of a coordination meeting on production and use of liquid glass in construction]. Kiev. 1963. pp. 283–296. (In Russian).
  • Marchukajtis G.V. Vlijanie propitki betona monomerami na ego deformativnye svojstva [Concrete impregnation influence by monomers on its stress-strain properties]. Beton i zhelezobeton [Concrete and reinforced concrete]. 1977. no. 6. pp. 30–31. (In Russian).
  • Ovchinnikov V.P. Tehnologija burenija neftjanyh i gazovyh skvazhin: uchebnik dlja studentov vuzov [Technology of drilling of oil and gas wells]. Tyumen, 2014. 418 p. (In Russian).
  • Kravcov V.M., Kuznecov Ju.S., Mavljutov M.R., Agzamov F.A. Kreplenie vysokotemperaturnyh skvazhin v korrozionnoaktivnyh sredah [Cementing of high-temperature wells in the corrosive environments]. Moscow, Nedra, 1987. 190 p. (In Russian).
  • Agzamov F.A., Izmuhambetov B.S. Dolgovechnost’ tamponazhnogo kamnja v korrozionno-aktivnyh sredah [Durability of a grouting stone in the corrosive environments]. Saint-Petersburg, Nedra, 2005. 318 p. (In Russian).
  • Polak A.F. Matematicheskoe modelirovanie processa korrozii betona v zhidkih sredah [Mathematical model operation of process of corrosion of concrete in liquid environments]. Beton i zhelezobeton [Concrete and reinforced concrete]. 1988. no. 3. pp. 30–34. (In Russian).
  • Danjushevskij V.S., Tarnavskij A.P. Gazovaja serovodorodnaja korrozija tamponazhnyh cementov [Gas hydrosulphuric corrosion of grouting cements]. Gazovaja promyshlennost’ [Gas industry]. 1977. no. 6. pp. 46–48. (In Russian).
  • Rahimbaev Sh.M., Avershina N.M. Modelirovanie processov himicheskoj korrozii stroitel’nyh materialov [Model operation of processes of chemical corrosion of structural materials]. Sbornik dokladov mezhdunarodnoj konferencii «Novye tehnologicheskie reshenija i jekonomicheskie problemy v proizvodstve betonov, drugih stroitel’nyh materialov i izdelij» [Reports of the international conference «New Technology Solutions and Economic Problems in Production of Concrete, Other Structural Materials and Products»]. Belgorod, 1996. pp. 167–172. (In Russian).
  • Kuncevich O.V., Mahinin B.V., Shangina N.N. Struktura cementnogo kamnja s dobavkami superplastifikatora i mikrokremnezema [Structure of a cement stone with additives of supersoftener and microsilicon dioxide]. Tsement [Cement]. 1992. no. 6. pp. 30–36. (In Russian).
  • Urkhanova L.А., Lkhasaranov S.А., RozinaV.Ye., Buyantuev S.L., Bardakhanov S.P. Increased corrosion resistance of basalt reinforced cement compositions with nanosilica. Nanotehnologii v stroitel’stve = Nanotechnologies in Construction. 2014, Vol. 6, no. 4, рр. 15–29. Available at: http://nanobuild.ru/en_EN/ (Accessed 16.01.2019). (In Russian).
  • Massalimov I.A., Yanakhmetov M.R., Chuykin A.E. Strength and durability of Concrete modified by sulfur-based impregnating compounds. Nanotehnologii v stroitel’stve = Nanotechnologies in Construction. 2015, Vol. 7, no. 3, pp. 61–75. DOI: dx.doi.org/10.15828/2075-8545-2015-7-3-61-75. (In Russian).
  • Yanakhmetov M.R., Chuykin A.E., Massalimov I.A. Pore structure modification оf cement concretes by impregnation with sulfur-containing compounds. Nanotehnologii v stroitel’stve = Nanotechnologies in Construction. 2015, Vol. 7, no. 1, pp. 63–72. DOI: dx.doi.org/10.15828/2075-8545-2015-7-1-63-72.
  • Agzamov F.A., Konesev G.V., Hafizov A.R. Application of disintigratory technology for the modification of materials used in the construction of wells. Part II. Nanotehnologii v stroitel’stve = Nanotechnologies in Construction. 2017, Vol. 9, no. 3, pp. 96–108. DOI: dx.doi.org/10.15828/2075-8545-2017-9-3-96-108. (In Russian).
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