tizzaТрудноизвлекаемые запасыHard-to-recover reservesВысшая школа нефтиtizza-34Research ArticleСтатьиСравнительный анализ эффективности различных форм и технологий закачки CO2 для геологического захоронения и повышения нефтеотдачи пластовComparative analysis of the efficiency of various forms and technologies of CO2 injection for geological storage and enhanced oil recoveryГарифуллинаЧ. А.GarifullinaCh. A.ch.garifullina@agni-rt.ruКлимовД. С.KlimovD. S.klimov_ds@ipng.ruАльметьевский государственный технологический университет «Высшая школа нефти»РоссияAlmetyevsk State Technological University «Petroleum Higher School»Russian FederationИнститут проблем нефти и газа Российской академии наукРоссияOil and gas research institute of the Russian academy of sciencesRussian Federation202630062026124751Copyright © Гарифуллина Ч.А., Климов Д.С., 20262026Гарифуллина Ч.А., Климов Д.С.Garifullina C.A., Klimov D.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://xn--g1abxh.xn----8sbeg1c7ah8a.xn--p1ai/jour/article/view/34

С целью снижения антропогенных выбросов СО2 необходима реализация проектов по улавливанию и закачке диоксида углерода в пласт для геологического хранения и повышения нефтеотдачи. В статье рассмотрены основные методы закачки CO2 в пластовые системы, применяемые для повышения нефтеотдачи и геологического хранения углекислого газа. Проанализированы закачка сверхкритического CO2, технология водогазового воздействия (WAG), а также закачка карбонизированной воды. Некоторые исследования показывают, что удержание CO наиболее эффективно при его закачке в растворенном виде в пластовой воде по сравнению с другими методами, однако, при этом закачивается меньшая масса CO2. В сверхкритическом состоянии наблюдается более высокая подвижность фронта вытеснения. Для технологии водогазового воздействия характерны промежуточные показатели охвата и эффективности.

To reduce anthropogenic carbon dioxide (CO2) emissions, it is necessary to implement carbon capture projects followed by CO2 injection into reservoir formations for geological storage and enhanced oil recovery. This paper examines the main CO2 injection methods applied in reservoir systems for both enhanced oil recovery and long-term carbon sequestration. The analysis includes the injection of supercritical CO2, water-alternating-gas (WAG) technology, and carbonated water injection. Several studies indicate that CO2 retention is most efficient when it is injected in dissolved form within formation water compared to other methods; however, the total mass of CO2 injected under such conditions is lower. In the supercritical state, a higher mobility of the displacement front is observed, leading to improved sweep efficiency. The WAG process demonstrates intermediate performance in terms of both sweep efficiency and oil displacement effectiveness.

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The authors declare that there are no conflicts of interest present.