AP26195325 – Research of technological methods to improve the efficiency of oil extraction from complex, heterogeneous formations of oil fields in Western Kazakhstan

Objective of the project – to create a scientific justification for the alignment of the reservoir's pick-up profile to regulate the impact on heterogeneous formations in the oil fields of Western Kazakhstan, as well as to search for technological solutions aimed at increasing the resistance of oil and gas equipment to erosion and corrosion wear.

Relevance: The relevance of the project is driven by the need to improve oil recovery efficiency in reservoirs with heterogeneous formations, where conventional methods fail to ensure uniform sweep efficiency. Existing technologies aimed at permeability control and enhanced oil recovery often do not fully account for complex physicochemical and hydrodynamic processes in partially water-flooded reservoirs. The insufficient understanding of the interaction mechanisms between injected agents and reservoir rock leads to suboptimal selection of technological parameters. With the increasing share of hard-to-recover reserves, there is a growing need for scientifically grounded approaches to managing the injectivity profile of reservoirs. The application of modern modeling and analytical methods allows for more accurate prediction of the effectiveness of applied technologies. Overall, the project aims to develop optimal solutions that enhance oil recovery, reduce operational risks, and improve the efficiency of field development.

Scientific supervisor: Ph.D., Associate Professor, Raikhan Suleimenova

Expected and achieved results: During the project implementation, data were obtained that enable the ranking of reservoir candidates for enhanced oil recovery (EOR) methods based on their economic potential and reservoir properties. The geological prospects for injectivity profile modification were identified, providing a basis for more accurate planning of technological operations. An experimental plan was developed and equipment was selected to study optimal reagent parameters. Screening of key characteristics was carried out, including molecular weight, concentration, degree of hydration, optimal pH and salinity, as well as the identification of effective chemical substances and their composition. Hydrodynamic tests were conducted with visual monitoring of polymer retention in the porous medium, its movement, and interaction with the reservoir. Processes of reagent incompatibility due to salinity and pH effects, as well as the formation of inorganic salts, were also investigated. The obtained results are expected to provide recommendations for selecting the most effective reservoir treatment strategies, considering heterogeneity. The implementation of these approaches will enhance oil recovery, improve reservoir management, and extend the service life of oil and gas equipment.

List of publications with links to them

1. Suleimenova R., Moldabayeva G.Zh., Kozlovskiy A.L., Toktarbay Z., Shamshenova A.E., Sadvakassov M.A.
   Study of the Influence of Variation in the Number of Layers in Multilayer Aluminium Nitride-Titanium-di-oxide Coatings on Resistance to Thermal Effects and Cavitation Erosion // ES Materials and Manufacturing. – Tennessee (USA), 2025. – Vol. 29. – Article 1707. – P. 01–014. – DOI: https://dx.doi.org/10.30919/mm1707. – ISSN 2578-0611.

1. Suleimenova R., Moldabayeva G.Zh., Kozlovskiy A.L., Toktarbay Z., Kuanyshev A., Zhaxylykova M.
   Study of the Degradation Kinetics of Strength Properties of Multilayer Oxy-nitride Coatings during Hydrogenation // ES Materials and Manufacturing. – Tennessee (USA), 2025. – Vol. 29. – Article 1708. – P. 01–013. – DOI: https://dx.doi.org/10.30919/mm1708. – ISSN 2578-0611.