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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">Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Самарского государственного технического университета. Серия «Физико-математические науки»</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1991-8615</issn><issn publication-format="electronic">2310-7081</issn><publisher><publisher-name xml:lang="en">Samara State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">626243</article-id><article-id pub-id-type="doi">10.14498/vsgtu2080</article-id><article-id pub-id-type="edn">AMYRIA</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Mathematical Modeling, Numerical Methods and Software Complexes</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Математическое моделирование, численные методы и комплексы программ</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">A computational model of a vertical well with waterflooding fracturing for pressure transient analysis</article-title><trans-title-group xml:lang="ru"><trans-title>Расчетная модель вертикальной скважины с трещиной автоматического гидравлического разрыва пласта для интерпретации параметров при гидродинамических исследованиях скважин</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6526-4870</contrib-id><name-alternatives><name xml:lang="en"><surname>Maykov</surname><given-names>Dmitriy N.</given-names></name><name xml:lang="ru"><surname>Майков</surname><given-names>Дмитрий Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Leading Specialist, Junior Researcher</p></bio><bio xml:lang="ru"><p>ведущий специалист, младший научный сотрудник</p></bio><email>dmaykov@integra.ru</email><uri>https://www.mathnet.ru/person180418</uri><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-5599-4366</contrib-id><name-alternatives><name xml:lang="en"><surname>Isupov</surname><given-names>Sergey V.</given-names></name><name xml:lang="ru"><surname>Исупов</surname><given-names>Сергей Вадимович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Head of the Automation Dept</p></bio><bio xml:lang="ru"><p>начальник отдела автоматизации</p></bio><email>svisupov@integra.ru</email><uri>https://www.mathnet.ru/person227480</uri><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1500-6950</contrib-id><name-alternatives><name xml:lang="en"><surname>Makarov</surname><given-names>Sergey S.</given-names></name><name xml:lang="ru"><surname>Макаров</surname><given-names>Сергей Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Engineering Science; Senior Researcher</p></bio><bio xml:lang="ru"><p>доктор технических наук; ведущий научный сотрудник</p></bio><email>ssmak15@mail.ru</email><uri>https://www.mathnet.ru/person54490</uri><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">SIAM MASTER Ltd</institution></aff><aff><institution xml:lang="ru">ООО «Сиам Мастер»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Udmurt Federal Research Center of the Ural Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Удмуртский федеральный исследовательский центр Уральского отделения Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-05-20" publication-format="electronic"><day>20</day><month>05</month><year>2025</year></pub-date><volume>29</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>91</fpage><lpage>108</lpage><history><date date-type="received" iso-8601-date="2024-01-31"><day>31</day><month>01</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-02-21"><day>21</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Authors; Samara State Technical University (Compilation, Design, and Layout)</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Авторский коллектив; Самарский государственный технический университет (составление, дизайн, макет)</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Authors; Samara State Technical University (Compilation, Design, and Layout)</copyright-holder><copyright-holder xml:lang="ru">Авторский коллектив; Самарский государственный технический университет (составление, дизайн, макет)</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/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/1991-8615/article/view/626243">https://journals.eco-vector.com/1991-8615/article/view/626243</self-uri><abstract xml:lang="en"><p>A new computational model for a vertical well with waterflooding fracturing is presented, which accounts for changes in the fracture half-length during the interpretation of pressure transient analysis (PTA) parameters. The model is based on a numerical algorithm derived from an analytical solution, utilizing a proposed relationship between the fracture half-length, process time, and its geometric dimensions. This functional dependence is developed using available PTA data.The model employs the infinite-conductivity fracture equation and the superposition principle to describe changes in fracture geometry. The superposition principle is implemented through a series of activations and deactivations of fictitious wells with varying fracture half-lengths, where each well operates for a specific time interval before being shut down.It is demonstrated that the change in fracture half-length during the closure stage follows a functional dependence on the initial and final fracture half-lengths, as well as the well operation time. The results obtained from the proposed model, incorporating the fracture half-length dependence function, show good agreement with experimental data when calculating pressure in a well with waterflooding fracturing.A numerical analysis of the vertical well model with waterflooding fracturing is conducted using the developed algorithm. The influence of the final fracture half-length and the duration of fracture closure on pressure changes and the pressure derivative in the well is established. The use of the proposed fracture half-length dependence in calculating well operating conditions is shown to be justified. The application of this model allows for a more accurate description of parameter changes during PTA interpretation in wells with fractures of variable length.</p></abstract><trans-abstract xml:lang="ru"><p>Представлена новая расчетная модель вертикальной скважины с трещиной гидравлического разрыва пласта, позволяющая учитывать изменение полудлины трещины при интерпретации данных гидродинамических исследований скважин (ГДИС). Основу модели составляет численный алгоритм, основанный на аналитическом решении с использованием оригинальной зависимости изменения полудлины трещины от времени и ее геометрических параметров. Данная зависимость получена на основе анализа промысловых данных ГДИС.Модель реализована с использованием уравнения трещины бесконечной проводимости и принципа суперпозиции для описания изменения геометрии трещины. Принцип суперпозиции применен через последовательность запусков и остановок фиктивных скважин с различными полудлинами трещин, где каждая скважина активируется на определенный временной интервал, после чего останавливается.Установлено, что изменение полудлины трещины на этапе ее закрытия описывается функциональной зависимостью от начальной и конечной полудлины трещины, а также от времени работы скважины. Результаты расчетов по предложенной модели, учитывающей зависимость полудлины трещины при определении давления в вертикальной скважине с трещиной гидравлического разрыва пласта, демонстрируют хорошее согласование с экспериментальными данными. На основе разработанного численного алгоритма проведен параметрический анализ модели вертикальной скважины с трещиной гидравлического разрыва пласта. Выявлено влияние конечной полудлины трещины и длительности ее закрытия на изменение давления и производную давления в скважине.Результаты численного анализа подтверждают обоснованность использования предложенной зависимости изменения полудлины трещины при расчете эксплуатационных режимов. Применение данной модели позволяет более точно интерпретировать данные ГДИС с учетом изменяющейся длины трещины.</p></trans-abstract><kwd-group xml:lang="en"><kwd>well</kwd><kwd>fracture</kwd><kwd>waterflooding fracturing</kwd><kwd>analytical solution</kwd><kwd>superposition principle</kwd><kwd>fracture half-length dependence functions</kwd><kwd>numerical analysis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>скважина</kwd><kwd>трещина</kwd><kwd>автоматический гидроразрыв</kwd><kwd>аналитическое решение</kwd><kwd>принцип суперпозиции</kwd><kwd>функции зависимости полудлины трещины</kwd><kwd>параметрический анализ</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Nolte K. G. Determination of proppant and fluid schedules from fracturing-pressure decline, SPE Prod. Eng., 1986, vol. 1, no. 4, pp. 255–265, SPE-13278-PA. 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