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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nznistu</journal-id><journal-title-group><journal-title xml:lang="ru">Науки о Земле и недропользование</journal-title><trans-title-group xml:lang="en"><trans-title>Earth sciences and subsoil use</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2686-9993</issn><issn pub-type="epub">2686-7931</issn><publisher><publisher-name>Federal State Budget Educational Institution of Higher Education "Irkutsk National Research Technical University"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/2686-9993-2020-43-4-467-475</article-id><article-id custom-type="elpub" pub-id-type="custom">nznistu-120</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Обогащение и переработка полезных ископаемых</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Benefication and Processing of Minerals</subject></subj-group></article-categories><title-group><article-title>Исследование влияния растворения диоксида углерода в нефти на агрегацию асфальтенов в условиях месторождений Республики Башкортостан</article-title><trans-title-group xml:lang="en"><trans-title>Studying the effect of carbon dioxide oil solubility on asphaltene aggregation under conditions of the Bashkortostan Republic fields</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шаяхметов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shayakhmetov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шаяхметов Айрат Ильфатович, кандидат технических наук, доцент кафедры разработки и эксплуатации газовых и нефтегазоконденсатных месторождений</p><p>450064, г. Уфа, ул. Космонавтов</p></bio><bio xml:lang="en"><p>Airat I. Shayakhmetov, Cand. Sci. (Eng.), Associate Professor of the Department of Gas and Oil &amp; Gas Condensate Field Development and Operation</p><p>1 Kosmonavtov St., Ufa 450064</p></bio><email xlink:type="simple">airat_shayahmeto@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малышев</surname><given-names>В. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Malyshev</surname><given-names>V. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малышев Виктор Леонидович, кандидат физико-математических наук, доцент, доцент кафедры разработки и эксплуатации газовых и нефтегазоконденсатных месторождений</p><p>450064, г. Уфа, ул. Космонавтов</p></bio><bio xml:lang="en"><p>Viktor L. Malyshev, Cand. Sci. (Phys. &amp; Math.), Associate Professor, Associate Professor of the Department of Gas and Oil &amp; Gas Condensate Field Development and Operation</p><p>1 Kosmonavtov St., Ufa 450064</p></bio><email xlink:type="simple">victor.l.malyshev@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Моисеева</surname><given-names>Е. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Moiseeva</surname><given-names>E. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Моисеева Елена Флоридовна, кандидат физико-математических наук, доцент, доцент кафедры разработки и эксплуатации газовых и нефтегазоконденсатных месторождений</p><p>450064, г. Уфа, ул. Космонавтов</p></bio><bio xml:lang="en"><p>Elena F. Moiseeva, Cand. Sci. (Phys. &amp; Math.), Associate Professor, Associate Professor of the Department of Gas and Oil &amp; Gas Condensate Field Development and Operation</p><p>1 Kosmonavtov St., Ufa 450064</p></bio><email xlink:type="simple">elena.f.moiseeva@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пономарев</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Ponomarev</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пономарев Александр Иосифович, доктор технических наук, профессор, заведующий кафедрой разработки и эксплуатации газовых и нефтегазоконденсатных месторождений</p><p>450064, г. Уфа, ул. Космонавтов</p><p> </p></bio><bio xml:lang="en"><p>Alexander I. Ponomarev, Dr. Sci. (Eng.), Professor, Head of the Department of Gas and Oil &amp; Gas Condensate Field Development and Operation</p><p>1 Kosmonavtov St., Ufa 450064</p></bio><email xlink:type="simple">pnmrv@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зейгман</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zeigman</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зейгман Юрий Вениаминович, доктор технических наук, профессор, заведующий кафедрой разработки и эксплуатации нефтегазовых месторождений</p><p>450064, г. Уфа, ул. Космонавтов</p></bio><bio xml:lang="en"><p>Yuriy V. Zeigman, Dr. Sci. (Eng.), Professor, Head of the Department of Oil &amp; Gas Field Development and Operation</p><p>1 Kosmonavtov St., Ufa 450064</p></bio><email xlink:type="simple">jvzeigman@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уфимский государственный нефтяной технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ufa State Petroleum Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>27</day><month>01</month><year>2021</year></pub-date><volume>43</volume><issue>4</issue><fpage>467</fpage><lpage>475</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шаяхметов А.И., Малышев В.Л., Моисеева Е.Ф., Пономарев А.И., Зейгман Ю.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Шаяхметов А.И., Малышев В.Л., Моисеева Е.Ф., Пономарев А.И., Зейгман Ю.В.</copyright-holder><copyright-holder xml:lang="en">Shayakhmetov A.I., Malyshev V.L., Moiseeva E.F., Ponomarev A.I., Zeigman Y.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.nznj.ru/jour/article/view/120">https://www.nznj.ru/jour/article/view/120</self-uri><abstract><p>Целью данного исследования является изучение влияния растворения в нефти диоксида углерода на агрегацию ассоциатов асфальтенов и на снижение нефтепроницаемости песчаников. Авторами рассмотрены варианты взаимодействия нефти с диоксидом углерода в свободном объеме до закачки в пористую среду и непосредственно в пористой среде. Изучено влияние состава нефти на агрегацию ассоциатов асфальтенов. Влияние растворенного диоксида углерода на дисперсность ассоциатов в нефти изучалось путем фильтрации ее в песчаниках. Агрегирование асфальтенов, если оно происходит в пористой среде, сопровождается закупоркой пор со снижением проницаемости пород, вызывает осложнения при освоении скважин под закачку диоксида углерода и в конечном счете затрудняет достижение запланированных показателей добычи и нефтеотдачи пласта. При взаимодействии нефти с диоксидом углерода в свободном объеме до закачки в пористую среду установлено, что с увеличением объема профильтрованной нефти и концентрации растворенного в нефти диоксида углерода, а также с уменьшением проницаемости песчаника относительная подвижность нефти с растворенным диоксидом углерода снижается. Значительное влияние проницаемости песчаника на результаты экспериментов указывает на то, что размеры агрегатов асфальтенов сопоставимы с размерами мелких пор. Полного затухания фильтрации в песчаниках после пропускания нефти с растворенным в ней диоксидом углерода не наблюдается. На основе анализа изменения состава и свойств нефти в ходе лабораторных экспериментов по вытеснению нефти оторочками диоксида углерода установлено, что при непосредственном контакте нефти с диоксидом углерода в пористой среде происходит агрегация ассоциатов асфальтенов. С увеличением содержания асфальтенов в составе нефти нефтепроницаемость пласта существенно снижается. При этом более значительное снижение проницаемости наблюдается в малопроницаемых пластах.</p></abstract><trans-abstract xml:lang="en"><p>The purpose of this work is to study the effect of carbon dioxide oil solubility on the aggregation of asphaltene associates and decrease of oil permeability of sandstones. Consideration is given to the interaction variants of oil and carbon dioxide in a free volume before being injected into a porous medium and immediately in the porous medium. The influence of oil composition on the aggregation of asphaltene associates is studied. The effect of the dissolved carbon dioxide on associate dispersion in oil is examined through oil filtering in sandstones. If asphaltene aggregation occurs in a porous medium it causes pore plugging leading to reduced permeability, complicates the development of carbon dioxide injection wells and, as a result, prevents from achieving the planned indicators of oil production and oil recovery. It is found that in the case when oil interacts with carbon dioxide in the free volume before being injected into a porous medium, the increase in the volume of filtered oil and the concentration of carbon dioxide dissolved in oil, and decrease in sandstone permeability reduce the relative mobility of oil with the dissolved carbon dioxide. The significant influence of sandstone permeability on the experimental results indicates that the sizes of asphaltene aggregates are comparable to the sizes of small pores. We have not observed complete attenuation of filtration after passing of oil with dissolved carbon dioxide through sandstones. Based on the analysis of changes in oil composition and properties carried out in the laboratory experiments on oil displacement by carbon dioxide rims, it has been determined that aggregation of asphaltene associates takes place under immediate contact of oil and carbon dioxide in a porous medium. The higher the asphaltene content in oil, the lower the formation permeability, whereas tight formations feature a more significant decrease in permeability.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>диоксид углерода</kwd><kwd>асфальтены</kwd><kwd>повышение нефтеотдачи</kwd></kwd-group><kwd-group xml:lang="en"><kwd>carbon dioxide</kwd><kwd>asphaltenes</kwd><kwd>enhanced oil recovery</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Aycaguer A.-C., Lev-On M., Winer A.M. Reducing carbon dioxide emissions with enhanced oil recovery projects: a life cycle assessment approach // Energy &amp; Fuels. 2001. Vol. 15. Iss.</mixed-citation><mixed-citation xml:lang="en">Aycaguer AC, Lev-On M, Winer AM. Reducing carbon dioxide emissions with enhanced oil recovery projects: a life cycle assessment approach. 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