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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">geores</journal-id><journal-title-group><journal-title xml:lang="ru">Георесурсы</journal-title><trans-title-group xml:lang="en"><trans-title>Georesources</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1608-5043</issn><issn pub-type="epub">1608-5078</issn><publisher><publisher-name>Georesursy LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18599/grs.2024.3.16</article-id><article-id custom-type="elpub" pub-id-type="custom">geores-335</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>ГЕОЛОГО-ГЕОХИМИЧЕСКИЕ ИССЛЕДОВАНИЯ, ПОИСК, РАЗВЕДКА И РАЗРАБОТКА МЕСТОРОЖДЕНИЙ УГЛЕВОДОРОДОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>GEOLOGICAL-GEOCHEMICAL RESEARCH, PROSPECTING, EXPLORATION AND DEVELOPMENT OF HYDROCARBON FIELDS</subject></subj-group></article-categories><title-group><article-title>Определение удельного электрического сопротивления керна с помощью тороидальных катушек: математическое моделирование</article-title><trans-title-group xml:lang="en"><trans-title>Application of Toroidal Coils to Obtain Electrical Resistivity of Core Samples: Mathematical Modeling</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>Эпов</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Epov</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Иванович Эпов – доктор тех. наук, профессор, академик РАН, главный научный сотрудник</p><p>630090, Новосибирск, пр. Ак. Коптюга, д. 3</p></bio><bio xml:lang="en"><p>Mikhail I. Epov – Dr. Sci. (Engineering), Professor, RAS Academician, Chief Researcher</p><p>3 Ac. Koptyug av., Novosibirsk, 630090</p></bio><email xlink:type="simple">epovmi@ipgg.sbras.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>Мамяшев</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Mamyashev</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Венер Галиуллинович Мамяшев – кандидат геол.-мин. наук, доцент кафедры прикладной геофизики</p><p>625000, Тюмень, ул. Володарского, д. 38</p></bio><bio xml:lang="en"><p>Vener G. Mamyashev – Cand. Sci. (Geology and Mineralogy), Associate Professor</p><p>38 Volodarskogo st., Tyumen, 625000</p></bio><email xlink:type="simple">tmngeofiz@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михайлов</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhaylov</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Владиславович Михайлов – кандидат тех. наук, старший научный сотрудник; доцент</p><p>630090, Новосибирск, пр. Ак. Коптюга, д. 3</p><p>630090, Новосибирск, ул. Пирогова, д. 1</p></bio><bio xml:lang="en"><p>Igor V. Mikhaylov – Cand. Sci. (Engineering), Senior Researcher; Associate Professor</p><p>3 Ac. Koptyug av., Novosibirsk, 630090</p><p>1 Pirogova st., Novosibirsk, 630090</p></bio><email xlink:type="simple">mikhayloviv@ipgg.sbras.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Суродина</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Surodina</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Владимировна Суродина – кандидат физ.-мат. наук, старший научный сотрудник</p><p>630090, Новосибирск, пр. Ак. Коптюга, д. 3</p></bio><bio xml:lang="en"><p>Irina V. Surodina – Cand. Sci. (Physics and Mathematics), Senior Researcher</p><p>3 Ac. Koptyug av., Novosibirsk, 630090</p></bio><email xlink:type="simple">sur@ommfao1.sscc.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>Никитенко</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikitenko</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марина Николаевна Никитенко – доктор тех. наук, ведущий научный сотрудник</p><p>630090, Новосибирск, пр. Ак. Коптюга, д. 3</p></bio><bio xml:lang="en"><p>Marina N. Nikitenko – Dr. Sci. (Engineering), Lead Researcher</p><p>3 Ac. Koptyug av., Novosibirsk, 630090</p></bio><email xlink:type="simple">nikitenkomn@ipgg.sbras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт нефтегазовой геологии и геофизики им. А.А. Трофимука СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Тюменский индустриальный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Industrial University of Tyumen</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт нефтегазовой геологии и геофизики им. А.А. Трофимука СО РАН; Новосибирский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>09</month><year>2024</year></pub-date><volume>26</volume><issue>3</issue><fpage>151</fpage><lpage>161</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Эпов М.И., Мамяшев В.Г., Михайлов И.В., Суродина И.В., Никитенко М.Н., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Эпов М.И., Мамяшев В.Г., Михайлов И.В., Суродина И.В., Никитенко М.Н.</copyright-holder><copyright-holder xml:lang="en">Epov M.I., Mamyashev V.G., Mikhaylov I.V., Surodina I.V., Nikitenko M.N.</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.geors.ru/jour/article/view/335">https://www.geors.ru/jour/article/view/335</self-uri><abstract><p>Рассмотрена возможность определения удельного электрического сопротивления (УЭС) цилиндрического керна с помощью размещённой вокруг него генераторно-измерительной системы с тороидальными катушками. Разработан и верифицирован алгоритм двумерного конечно-разностного моделирования электрических и магнитных сигналов от стороннего кругового магнитного гармонического тока, эквивалентного тороидальной катушке. Выполнено двумерное численное моделирование реальной (синфазной) и мнимой (противофазной) составляющих вертикальной компоненты электрического поля и тангенциальной компоненты магнитного поля для практически значимого диапазона УЭС керна, когда образец находится в изолирующей или сильнопроводящей трубе с тороидальными катушками. По результатам численного моделирования выбраны оптимальная длина измерительной системы, а также операционная частота и тип измеряемых сигналов. Предложена трансформация последних в значения кажущихся УЭС вертикально-неоднородных образцов. Установлены критерии соответствия измеряемых сигналов в тонкослоистых и эквивалентных электрически-макроанизотропных образцах при изменении электрического контраста и толщины прослоев.</p></abstract><trans-abstract xml:lang="en"><p>We consider the capability of evaluating the specific electrical resistivity of a cylindrical core by means of a transmitter-receiver system with toroidal coils placed around it. An algorithm for two-dimensional finite-difference modeling of electrical and magnetic signals from an external circular magnetic harmonic current equivalent to a toroidal coil has been developed and verified. We perform twodimensional numerical modeling of the real (in-phase) and imaginary (quadrature) part of the vertical component of the electric field and the tangential component of the magnetic field for a practically-significant range of core resistivities, the sample being located within an insulating or highly conductive tube with toroidal coils. Following the results of numerical simulation, the optimal length of the measuring system is selected, as well as the operating frequency and type of measured signals. The transformation of the latter into the apparent resistivity values of vertically inhomogeneous samples is proposed. Moreover, criteria have been established for the correspondence of the measured signals in thinlayered and equivalent electrically macroanisotropic samples when changing the resistivity contrast and thickness of the interlayers.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>тороидальная катушка</kwd><kwd>керн</kwd><kwd>удельное электрическое сопротивление</kwd><kwd>математическое моделирование</kwd><kwd>метод конечных разностей</kwd><kwd>двумерная модель</kwd><kwd>трансформация сигнала</kwd></kwd-group><kwd-group xml:lang="en"><kwd>toroidal coil</kwd><kwd>core material</kwd><kwd>specific electrical resistivity</kwd><kwd>mathematical modeling</kwd><kwd>finite difference method</kwd><kwd>two-dimensional model</kwd><kwd>signal transformation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке проекта ФНИ № FWZZ-2022-0026 «Инновационные аспекты электродинамики в задачах разведочной и промысловой геофизики».</funding-statement><funding-statement xml:lang="en">The research was carried out with the financial support of the Russian federal research project No. FWZZ-2022- 0026 “Innovative aspects of electrodynamics in problems of exploration and oilfield geophysics”.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Герке К.М., Корост Д.В., Карсанина М.В., Корост С.Р., Васильев Р.В., Лаврухин Е.В., Гафурова Д.Р. 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