Comparative Analysis of Successful Application of EOR in Russia and CIS

Basnieva, I.K.; Zolotukhin, A.B.; Eremin, N.A.; Udovina, E.F.

doi:10.2118/28002-ms

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…Thomas provided six parameters for screening potential reservoirs, and evaluated each parameter using a scoring method [12]. Xiang et al applied the fuzzy AHP to conduct a comprehensive evaluation of CO2 injection in mixed-phase oil reservoirs, and proposed a method for evaluating the comprehensive weight of each evaluation parameter and the injection potential of candidate reservoirs [13][14][15][16][17][18][19]. In addition, other methods have also been used to establish standard evaluations of the effect of gas injection.…”

Section: Introductionmentioning

confidence: 99%

Evaluation method for CO2 flooding suitability of condensate gas reservoir based on fuzzy analytic hierarchy process

Dali¹,

Hou²,

Zhu³

et al. 2023

Preprint

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CO2 injection to the middle and late stage of development of condensate gas reservoir can not only improve gas well recovery, but also realize the stable storage of CO2, which is of great practical significance to our energy development strategy, and conducive to the realization of "peak carbon neutralization". Comprehensive evaluation of CO2 injection suitability before CO2 injection in condensate gas reservoirs is an important basis for successful CO2 flooding in the field. Firstly, a comprehensive evaluation method of CO2 flooding suitability for condensate gas reservoirs is established based on fuzzy mathematics; secondly, on the basis of literature research, existing indoor experiments and field experience, the influencing factors of CO2 injection in condensate gas reservoirs are summarized, and new evaluation criteria of CO2 injection suitability (4 primary indicators and 14 secondary indicators) are established and quantified; finally, the weights of 4 primary indexes and 14 secondary indexes are determined by AHP(analytic hierarchy process). Based on the above evaluation method, three blocks of HC gas reservoir were evaluated for the suitability of CO2 injection, and the practicality and reliability of this evaluation method were verified by comparing the evaluation results with the ultimate recovery of condensate gas reservoir in each block. This provides a new idea for the scheme adjustment of further development in the middle and later stages of condensate gas reservoir development.

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Section: Introductionmentioning

confidence: 99%

Evaluation method for CO2 flooding suitability of condensate gas reservoir based on fuzzy analytic hierarchy process

Dali¹,

Hou²,

Zhu³

et al. 2023

Preprint

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“…Горячая соленая вода в инжекторах могла поддерживать скорость закачки и, следовательно, поддерживать благоприятное число капилляров, что усиливало смещение поровых масштабов; однако ущерб, причиненный закачкой холодной соленой водой, продолжал наносить ущерб производству в последующие десятилетия. Даже несмотря на унаследованные повреждения резервуара, закачка горячей соленой водой было более эффективным методом добычи нефти и, как ожидается, позволит достичь конечного коэффициента нефтеотдачи 38% [5,6].…”

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A Review of Enhanced Oil Recovery Methods Used in the Fields of Kazakhstan

AKHMETZHAN,

ASHIMOVA,

MUHAMBETKALIEVA

et al. 2023

NiG

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Application of enhanced oil recovery methods in Kazakhstan has been ongoing for decades alongside the continued discovery of new oil and gas fields in the Pre-Caspian Basin. The objective of this review is to provide an overview of the hydrocarbon reserves and production, and the status of the petroleum industry in Kazakhstan, with a focus on the EOR methods and projects being applied to recover those reserves. A summary of the specific EOR methods in use was prepared, and existing enhanced recovery projects in Kazakhstan were reviewed and their successes and challenges were investigated. The performance of these projects in the context of EOR performance indicators such as capillary number and mobility ratio, as well as operational and environmental issues, were examined. Recommendations for current and potential applications of EOR in Kazakhstan were also discussed. The widespread application of thermal EOR methods, in use for decades in Kazakhstan’s older fields, was found to be successful, with very favorable impacts on mobility ratio from the addition of thermal energy to the reservoirs. Miscible EOR methods in Kazakhstan have had more limited success, with some significant challenges due to high concentration of hydrogen sulfide in the injected gas. Polymer injection started in the late 1960s, achieving good results. A recent polymer injection pilot project has shown some promise, with a favorable impact on mobility ratio and oil production, although the project has not yet been expanded beyond two polymer injectors. These results indicate the huge potential of existing and future EOR projects. This review is the first compilation of Kazakhstan’s existing oil and gas reserves, production, and EOR project performance, and should be seen as a guide to the existing applications of EOR methods in Kazakhstan.

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The associative polymer flooding: an experimental study

Abirov

Ivakhnenko

Abirov

et al. 2019

J Petrol Explor Prod Technol

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This study investigates the sandpack displacement of low viscosity oil (1.68 cP) by brine and aqueous solutions of associative polymers. Polymer flooding has been thoroughly investigated in many laboratory and field tests. Polymer flooding is one of the most widely used enhanced oil recovery (EOR) methods. The method of polymer flooding is not used for development of oil fields with gas caps, fractured reservoirs, high permeability and active bottom-water drive. In the application of polymer flooding, coefficient of oil recovery is increased by 3-10%. Hydrolyzed polymers undergo the significant thermal and chemical degradation at high temperature and salinity. In recent years, researchers have turned their attention to associative polymers. An application of associative polymers to withstand degradation in high temperature and high salinity conditions can enhance oil recovery in high heterogeneous fields. This article presents the results of studies of oil displacement by associative polymers in a two-layer core model. In laboratory studies, the core selected from a sandy reservoir of the South Turgay Basin of the Republic of Kazakhstan was used. Solutions of the following polymers were studied: hydrolyzed polyacrylamide (HPAM) and associative polymer. The physicochemical conditions of the experiments corresponded to the reservoir conditions of the sand layer of the South Turgay Basin: temperature of 82 °C and the salinity of the brine 92,000 ppm. Experiments revealed that the associative polymer is more stable in simulated reservoir conditions than the HPAM polymer. Associative polymer flooding was recommended for pilot testing at the reservoir of the South Turgay Basin.

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Comparative Analysis of Successful Application of EOR in Russia and CIS

Cited by 6 publications

References 2 publications

Evaluation method for CO2 flooding suitability of condensate gas reservoir based on fuzzy analytic hierarchy process

Evaluation method for CO2 flooding suitability of condensate gas reservoir based on fuzzy analytic hierarchy process

A Review of Enhanced Oil Recovery Methods Used in the Fields of Kazakhstan

The associative polymer flooding: an experimental study

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