Filtration Experiments for Assessing EOR Efficiency in High-Viscosity Oil Reservoirs: A Case Study of the East Moldabek Field, Kazakhstan
Soltanbekova K. Ramazanova G. Zhapbasbayev U. Kuatov Z.
April 2025Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2025#13Issue 4
This study is dedicated to fundamental research on evaluating the effectiveness of enhanced oil recovery (EOR) methods for high-viscosity oil reservoirs. This paper presents the results of filtration experiments assessing the application of thermal, chemical, and gas-based EOR techniques to reservoir cores of high-viscosity oil, using the East Moldabek field in Kazakhstan as a case study. Experimental studies were conducted on the Cretaceous horizons M-II and M-III as well as the Jurassic horizon J-IV. The obtained production data from the East Moldabek wells indicated the low efficiency of conventional recovery methods. The objective of this study was to identify the most effective EOR method in terms of displacement efficiency. The investigated recovery techniques included base case conventional waterflooding (displacement using formation water), thermal EOR (hot-water flooding), chemical EOR (polymer flooding and ASP flooding), and gas EOR (nitrogen and CO2 flooding). The filtration experiments were conducted at different times using various filtration systems. The results indicated that the most effective EOR methods for the highly viscous oil in the East Moldabek field were the chemical and thermal EOR techniques. The chemical EOR included ASP flooding, polymer flooding, and surfactant solution injection. ASP flooding achieved the highest increase in displacement efficiency, reaching 19%, making it the most effective method among all of the others.
ASP flooding , chemical methods , core flooding , displacement efficiency , enhanced oil recovery (EOR) , gas methods , interfacial tension , oil production , oil recovery , thermal methods
Text of the article Перейти на текст статьи
Scientific and Production Laboratory “Energy Modeling”, Satbayev University, Almaty, 050013, Kazakhstan
Atyrau Branch of LLP “KMG Engineering”, Atyrau, 060097, Kazakhstan
Scientific and Production Laboratory “Energy Modeling”
Atyrau Branch of LLP “KMG Engineering”
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026