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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">geophystech</journal-id><journal-title-group><journal-title xml:lang="ru">Геофизические технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Geophysical Technologies</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2619-1563</issn><publisher><publisher-name>IPGG SB RAS</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18303/2619-1563-2023-2-56</article-id><article-id custom-type="elpub" pub-id-type="custom">geophystech-292</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Трехмерные лучи Ломакса и их использование для моделирования акустических волновых полей в сложных средах</article-title><trans-title-group xml:lang="en"><trans-title>3D Lomax rays and its application for acoustic wavefield simulation in complex media</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>Неклюдов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Neklyudov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат физико-математических наук, старший научный сотрудник лаборатории многоволновых сейсмических исследований Института нефтегазовой геологии и геофизики СО РАН. Основные научные интересы: сейсмическая томография, выделение полезного сигнала в сейсмических данных.</p></bio><email xlink:type="simple">NeklyudovDA@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>Протасов</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Protasov</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор физико-математических наук, ведущий научный сотрудник лаборатории многоволновых сейсмических исследований Института нефтегазовой геологии и геофизики СО РАН. Основные научные интересы: исследования в области разработки алгоритмов обработки данных сейсморазведки.</p></bio><email xlink:type="simple">ProtasovMI@ipgg.sbras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт нефтегазовой геологии и геофизики им. А.А. Трофимука СО РАН&lt;br&gt;&#13;
630090, Новосибирск, просп. Акад. Коптюга, 3<country>Россия</country></aff><aff xml:lang="en">Trofimuk Institute of Petroleum Geology and Geophysics SB RAS&lt;br&gt;&#13;
Koptyug Ave., 3, Novosibirsk, 630090<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>01</day><month>09</month><year>2023</year></pub-date><volume>0</volume><issue>2</issue><fpage>56</fpage><lpage>71</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Неклюдов Д.А., Протасов М.И., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Неклюдов Д.А., Протасов М.И.</copyright-holder><copyright-holder xml:lang="en">Neklyudov D.A., Protasov M.I.</copyright-holder><license 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.rjgt.ru/jour/article/view/292">https://www.rjgt.ru/jour/article/view/292</self-uri><abstract><p>В данной работе мы представляем простой и эффективный подход для расчета частотно-зависимых лучей в трехмерных средах. В предложенном подходе моделируется распространение локально плоского фрагмента волнового фронта. Свойства луча зависят от распределения скоростей в некотором объеме среды в окрестности луча. Ширина этого объема зависит от длины волны к каждой точке на луче. Численный эксперимент демонстрирует применение предложенного подхода для расчета времен первых вступлений и акустических волновых полей в сложной трехмерной модели, в которой присутствует солевое тело.</p></abstract><trans-abstract xml:lang="en"><p>We present a simple and robust approach for calculating frequency-dependent rays in three dimensional media. The proposed method simulates propagation of locally plane fragment of a wavefront. Ray properties depends on velocity distribution in some sub-volume around the ray and on wavelength in each point. Numerical experiment demonstrates the applicability of the proposed method to calculate travel-times and ray-based acoustic wavefields in complex 3D environments with the presence of slat intrusion.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Лучевой метод</kwd><kwd>частотно-зависимые лучи</kwd><kwd>моделирование волновых полей</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Ray method</kwd><kwd>frequency dependent rays</kwd><kwd>wavefield modeling</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Данное исследование выполнено при финансовой поддержке РФФИ и ЧНФ в рамках научного проекта № 20-55-26003.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The reported study was funded by RFBR and GACR, project No. 20-55-26003.</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">Бабич В.М., Булдырев В.С. 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