АР19674847 – Investigation of the mechanism of water inflows and regularities of the influence of geological and technological factors on isolation work performance

The purpose of the work is to establish connection between residual resistance factor and physical and chemical properties, rheological and filtration characteristics of sludge-forming compositions depending on porous medium permeability and injection rate.

Relevance Currently, the share of fields with hard-to-recover oil reserves is increasing worldwide. In this aspect, Kazakhstan is among the countries with the problem of production of hard-to-recover hydrocarbons. Serious difficulties in oil production arise due to water inflows into wells. In such conditions introduction of various methods of oil production intensification is one of the basic methods of increasing of efficiency of technological solutions at management of field development. The problem of water inflows and related finding ways of their most effective isolation are on the agenda and currently as urgent.As a result of the analysis of numerous studies in recent years, the relevance of the problem of development of water shut-off technology, which includes all the necessary aspects and basic requirements to the composition provided for use, such as low viscosity of the solution to create an insulating screen of large radius; adjustable time of gel formation in a wide temperature range; high gel shear stress; selectivity of exposure, etc. is substantiated. As the main component of gel-forming system the use of polymer-based reagents with a new complex mechanism of action is envisaged.

Scientific supervisor: Doctor of technical sciences, Professor, Gulnaz Moldabayeva

Results obtained:  The study evaluated the effectiveness of polymer flooding in the Neocom II reservoir and demonstrated a positive outcome. An additional oil production of 27,440 tons was achieved, along with a slight reduction in water cut. A comprehensive analysis of geological, physical, and technological factors influencing water shutoff efficiency was conducted. It was established that different parameters affect performance indicators in varying ways, including treatment duration and incremental oil recovery. A decision-making algorithm based on mathematical statistics and fuzzy logic was developed to account for uncertainty in reservoir conditions. The results were published in scientific papers, and contributed to academic outputs including textbooks and dissertations.

List of publications with links to them

1. Moldabayeva G.Zh., Efendiyev G.M., Kozlovskiy A.L., Buktukov N.S., Abbasova S.V. Modeling and adoption of technological solutions in order to enhance the effectiveness of measures to limit water inflows into oil wells under conditions of uncertainty // ChemEngineering. – 2023. – Vol. 7. – P. 1–15. DOI: https://doi.org/10.3390/chemengineering7050089
2. Moldabayeva G.Z., Efendiyev G.M., Kozlovskiy A.L., Tuzelbayeva Sh.R., Imansakipova Z.B. Study of the rheological characteristics of sediment-gelling compositions for limiting water inflows // Applied Sciences. – 2023. – Vol. 13, No. 18. – P. 1–16. DOI: https://doi.org/10.3390/app131810473
3. Efendiyev G.M., Moldabayeva G.Zh., Abbasova S.V., Kirisenko O.G. Assessment of the influence of composition, properties and conditions of occurrence on oil quality based on fuzzy cluster analysis // SOCAR Proceedings. – 2023. – No. 4. – P. 87–91. DOI: http://dx.doi.org/10.5510/OGP20230400920
4. Moldabayeva G., Braun M., Pokhilyuk M., Buktukov N., Bakesheva A. Digital modeling of increasing the efficiency of water insulation in the bottom-hole zone of a well with various injection agents // News of the Academy of Sciences of the Republic of Kazakhstan. Series of Geology and Technical Sciences. – 2023. – Vol. 4, No. 460. – P. 145–156. DOI: https://doi.org/10.32014/2023.2518-170X.318
5. Moldabayeva G.Zh., Abbasova S.V., Zakenov S.T., Kirisenko O.G., Iklasova J.U., Zhanturin Zh.K., Tuzelbayeva Sh.R., Wang J. Analysis of methods for evaluating the effectiveness of geological and technical measures and decision-making for their selection: conceptual review // ANAS Transactions Earth Sciences. – 2025. – No. 1. – P. 3–11. DOI: https://doi.org/10.33677/ggianas20250100137
6. Efendiyev G.M., Moldabayeva G.Zh., Tuzelbayeva Sh.R., Imansakipova Z.B., Wu Hongjun. The method of non-stationary flooding and the conditions for its effective use in the operation of an oil field // Complex Use of Mineral Resources. – 2024. – Vol. 329, No. 2. – P. 54–62. DOI: https://doi.org/10.31643/2024/6445.16
7. Молдабаева Г.Ж., Эфендиев Г.М., Буктуков Н.С., Түзелбаева Ш.Р., Имансакипова З.Б., Ахметов А.Н. Влияние концентрации полимерных растворов на фильтрационные свойства коллекторов // Нефть и газ. Серия Добыча. – 2023. – № 4 (136). – С. 56–67. DOI: https://doi.org/10.37878/2708-0080/2023-4.04
8. Moldabayeva G.Zh., Turdiyev M.F., Suleimenova R.T., Buktukov N.S., Efendiyev G.M., Kodanova Sh.K., Tuzelbayeva Sh.R. Application of the integrated well-surface facility production system for selecting the optimal operating mode of equipment // Complex Use of Mineral Resources. – 2025. – Vol. 335, No. 4. – P. 96–109. DOI: https://doi.org/10.31643/2025/6445.44
9. Эфендиев Г.М., Молдабаева Г.Ж., Бастриков С.Н., Кирисенко О.Г., Сыздыков А.Х., Тузельбаева Ш.Р., Балуанов Б.А. Статистический анализ и принятие решений по повышению эффективности мероприятий по ограничению водопритоков в добывающих скважинах в условиях неопределенности // Известия высших учебных заведений «Нефть и газ» (Тюмень). – 2024. – № 1. – С. 92–107. DOI: https://doi.org/10.31660/0445-0108-2024-1-92-107
10. Молдабаева Г.Ж., Гусенов И.Ш., Абилева С.Ж. Тестирование рецептур полимерных гелей для оптимизации работы нефтяных скважин // Нефть и газ. – 2025. – № 1 (145). – С. 142–150. DOI: https://doi.org/10.37878/2708-0080/2025-1.08
11. Молдабаева Г.Ж., Сыздыков А.Х., Елигбаева Г.Ж. Разработка нефтяных месторождений. Вторичная добыча (Полимерное заводнение): учебник. – Алматы: КазНИТУ им. К.И. Сатпаева, 2024. – 227 с. ISBN 978-601-08-3475-0.
12. Молдабаева Г.Ж., Сыздыков А.Х., Елигбаева Г.Ж. Разработка нефтяных месторождений. Вторичная добыча (Полимерное заводнение) // Авторское свидетельство № 39690. – 2023.