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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">8322</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Numerical Investigation of Generalized Nested Factorization Preconditioner for Reservoir Simulation Problems</article-title><trans-title-group xml:lang="ru"><trans-title>Численное исследование предобуславливателя Generalized Nested Factorization для задач пластовой фильтрации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Borisov</surname><given-names>V E</given-names></name><name xml:lang="ru"><surname>Борисов</surname><given-names>Виталий Евгеньевич</given-names></name></name-alternatives><bio xml:lang="en">Department of mathematics and mechanics</bio><bio xml:lang="ru">Механико-математический факультет</bio><email>narelen@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Savenkov</surname><given-names>E B</given-names></name><name xml:lang="ru"><surname>Савенков</surname><given-names>Евгений Борисович</given-names></name></name-alternatives><email>e.savenkov@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University</institution></aff><aff><institution xml:lang="ru">МГУ им. М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Keldysh Institute for Applied Mathematics RAS</institution></aff><aff><institution xml:lang="ru">Институт прикладной математики им. М.В. Келдыша РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2013-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2013</year></pub-date><issue>1</issue><issue-title xml:lang="en">NO1 (2013)</issue-title><issue-title xml:lang="ru">№1 (2013)</issue-title><fpage>99</fpage><lpage>110</lpage><history><date date-type="received" iso-8601-date="2016-09-08"><day>08</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2013, Борисов В.Е., Савенков Е.Б.</copyright-statement><copyright-year>2013</copyright-year><copyright-holder xml:lang="ru">Борисов В.Е., Савенков Е.Б.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/8322">https://journals.rudn.ru/miph/article/view/8322</self-uri><abstract xml:lang="en">In this paper we present some results on application of Generalized Nested Factorization (GNF) preconditioner for real-life reservoir simulation problems. The test problems considered in the paper share some important features with reservoir models arise in real-life practice, e.g., a presence of non-local cell connections and unstructured computational grids. Numerical results are compared with the ones obtained using standard ILUT preconditioning techniques. Spectral properties of preconditioned matrices are analyzed. As a result very good performance of GNF preconditioner is observed for real-life reservoir simulation problems.</abstract><trans-abstract xml:lang="ru">Работа посвящена численному исследованию метода предобуславливания Generalized Nested Factorization (GNF) для задач пластовой фильтрации, отличительной особенностью которых является использование неструктурированных сеток и наличие нелокальных связей между ячейками. Приведены результаты сравнительного анализа алгоритма со стандартными предобуславливателями на основе неполного LU-разложения (ILU(0), ILU(1), ILUT). Численно исследованы спектральные свойства предобусловленных матриц. Результатом работы является вывод о хорошей робастности алгоритма GNF для реальных задач пластовой фильтрации.</trans-abstract><kwd-group xml:lang="en"><kwd>generalized nested factorization</kwd><kwd>reservoir simulation</kwd><kwd>preconditioning</kwd><kwd>incomplete LU factorization</kwd><kwd>Krylov subspace methods</kwd><kwd>generalized nested factorization</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>пластовая фильтрация</kwd><kwd>предобуславливание</kwd><kwd>неполное LU-разложение</kwd><kwd>итерационные методы решения СЛАУ</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Saad Y. Iterative Methods for Sparse Linear Systems. — SIAM, 2003.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Баландин М.Ю., Шурина Э.П. 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