Қазақстанның мұнай-газ саласының хабаршысыҚазақстанның мұнай-газ саласының хабаршысы2707-42262957-806XKMG Engineering10866210.54859/kjogi108662Review ArticleDevelopment the self-healing concept for well cement support integrity maintenance. Theory and practiceIsmagilovaElvira R.<p>Cand. Sc. (Engineering)</p>yusupova_elvira@mail.ruhttps://orcid.org/0000-0001-9610-0150Research and Design Institute of the Ufa State Petroleum Technological University030420246164733107202309112023Copyright © 2024, Ismagilova E.R.2024<p>Oftentimes oil and gas wells can be affected to various technological as well as chemical and natural stresses. Perforations, fracturing, side tracking from under the casings shoe, formation integrity testings all these lead to the cement sheath fragility and the annulus integrity deterioration causing the emergence of net of cracks in the cement sheath, which contribute to nascence of behind-the-casing flows.</p> <p>World statistics say that the issues of casing string-borehole annulus unsealing prevention, as well as the effective restoration of the cement sheath integrity in the presence of a wide range of water-shutoff materials and technologies for inflows bounding, do still remain open and require non-standard solutions. In this connection, the development of “self-healing” plugging material, which allows the cement stone to independently regenerate its integrity, thereby excluding technological shutdowns and the intervention of repair equipment, is one of the highest priority tasks and promising methods for eliminating behind-the-casing flows, accompanied by restoring the integrity of the well cement sheath. An advanced alternative to the traditional plugging material is elaboration of "self-healing" cements, which is hopeful in the line of the above-mentioned peculiarities.</p>self-healing cementcement sheathmodifying additivesplugging materialbehind-the-casing flowswell support durabilitywater influxөзін-өзі емдейтін цементцемент сақинасыөзгертетін қоспалартампонаж материалыбағана сыртының су айналымыұңғыманы бекітудің беріктігісу ағынысамозалечивающийся цементцементное кольцомодифицирующие добавкитампонажный материалзаколонная циркуляция водыдолговечность крепи скважиныводоприток1.Ismagilova ER, Agzamov FA. Development of additives in "self-healing" cements to restore the tightness of the cement ring of oil and gas wells. STJ Drilling-&-Oil. 2016;05:36–41.2.Ismagilova ER, Agzamov FA, Abbas AD. Optimization of the dispersion of additives in self-healing cements. GeoResources. 2017;19(2):129–134.3.Donald Jud G, Watts JM. Schools and Housing Values. Land Economics. 1981;57(3):459–470.4.Jianhang F, Xiu YY, Jian G, et al. Rapid self-sealing of macro cracks of cementitious composites by in-situ alginate crosslinking. Cement and Concrete Research. 2023;165:107074.5.Agzamov FA, Ismagilova ER. "Self-healing cements are the key to maintaining the tightness of the well supports." Part 1. Nanotechnology in construction. 2019;11(5):577–586. doi:10.15828/2075-8545-2019-11-5-577-586.6.Agzamov FA, Ismagilova ER. "Self-healing cements are the key to maintaining the tightness of the well supports." Part 2. Nanotechnology in construction. 2019;11(6):730–742. doi:10.15828/2075-8545-2019-11-6-730-742.7.Agzamov FA, Ismagilova ER, Beshir MA. Elaboration of mending additives for the cement sheath repair. Kazakhstan journal for oil & gas industry. 2022;4(3):69–75. doi:10.54859/kjogi108564.8.Patent RUS No. 2760860/01.12.2021. Byul. No. 34. Agzamov FA, Ismagilova ER. Backfill. Available from: https://patents.google.com/patent/RU2760860C1/ru#patentCitations. (In Russ).9.Ismagilova ER, Ozdoev ZI. Regulation of sheath properties of modifying additives used for the manufacture of "self-healing" cement. Modern technologies in oil and gas business. Proceedings of the international scientific and technical conference in 2 volumes. 2019;1:359–361.10.Utility model patent RUS No. 154661/27.08.2015. Agzamov FA, Ismagilova ER, Nguyen K. Installation for the study of filtration properties of porous materials.11.Hannov II. (LLC Geosphere). Drilling a water intake well. Act of completed works. 2021 Feb. Act No. 1. Contract No. 1-B.12.Ismagilova ER, Agzamov FA, Kuznetsov MA. Economic justification of the use of self-healing cement to restore the cement ring. International Scientific and Technical Conference dedicated to the memory of Academic A.H. Mirzajanzade: collection of theses. 2016;230–231.13.Ismagilova ER (LLC Research and Design Institute of Ufa State Petroleum Technological University). Development of eco-oriented cement technology for self-repair of the tightness of the well support. Scientific Research Report. Ufa; 2021. Report No. 4 Contract No. 4.14.Tsangouri E. A Decade of Research on Self-Healing Concrete. IntechOpen. Sustainable Construction and Building Materials. 2018. doi:10.5772/intechopen.82525.15.Ismagilova ER. Elaboration of cementing technology for well’s cement sheath self-restoration. STJ Drilling-&-Oil. 2022;4:16–21.