georesГеоресурсыGeoresources1608-50431608-5078Georesursy LLC10.18599/grs.2024.1.8geores-233Research ArticleСТАТЬИRESEARCH ARTICLESВлияние микроструктуры коллектора на состояние остаточной нефти по данным релаксометрии ядерно‑магнитного резонансаInfluence of Reservoir Microstructure on the State of Residual Oil According to Nuclear Magnetic Resonance (NMR) SpectroscopyМоЦзялиMoJiali

Мо Цзяли – аспирант

119991, Москва, пр. Ленинский, д. 65, корп. 1

Mo Jiali – Graduate student

Build. 1, 65, Leninsky ave., Moscow, 119991

mojiali111@gmail.comМихайловН. Н.MikhailovN. N.

Николай Нилович Михайлов – доктор тех. наук, профессор кафедры разработки и эксплуатации нефтяных месторождений; главный научный сотрудник

119991, Москва, пр. Ленинский, д. 65, корп. 1

Nikolai N. Mikhailov – Dr. Sci. (Technical Sciences), Professor; Chief Researcher

olko200@mail.ruВанХэнянWangHengyang

Ван Хэнян – канд. тех. наук, младший научный сотрудник

102206, Пекин, Байша, д. 197

Wang Hengyang – PhD (Technical Sciences), Associate Researche

197 Baisha Road, Beijing, 102206

wanghengyang716@mail.comРоссийский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. ГубкинаРоссияNational University of Oil and Gas “Gubkin UniversityRussian FederationРоссийский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. Губкина; Институт проблем нефти и газа РАНРоссияNational University of Oil and Gas “Gubkin University”; Institute of Oil and Gas Problems of the Russian Academy of SciencesRussian FederationSinopec Научно-исследовательский институт нефтяной инженерииКитайSinopec Research Institute of Petroleum EngineeringChina202406062024261100108Copyright © Мо Ц., Михайлов Н.Н., Ван Х., 20242024Мо Ц., Михайлов Н.Н., Ван Х.Mo J., Mikhailov N.N., Wang H.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.geors.ru/jour/article/view/233

Исследовано влияние свойств керна на состояние остаточной нефти в процессе вытеснения нефти водой на микроуровне. Рассмотрены распределение пор по размерам, проницаемость керна, динамика и морфология остаточной нефти. Анализ имеющихся экспериментальных подходов к изучению свойств керна и остаточной нефти в образцах показал, что существующие способы не дают полной информации об изучаемых параметрах. Для решения этих проблем предложено совместное использование инновационной технологии релаксационно-диффузионной релаксометрии ядерно-магнитного резонанса (ЯМР) с традиционной технологией. Для измерения долевого распределения пор по размерам использован комбинированный метод инжекции ртути и ядерного магнитного резонанса. С помощью метода ЯМР определена проницаемость керна. Двумерная ЯМР-релаксометрия позволяет изучать микроскопическое состояние остаточной нефти в ненарушенном керне в процессе вытеснения. С помощью предлагаемой методики исследован керн месторождения Шэнли в Китае. Получены распределения пор по размерам, определены проницаемость и остаточная нефтенасыщенность на разных стадиях вытеснения. Выделены четыре типа остаточной нефти: полосообразная (островная), пленочная, сетчатая, непрерывная. Показано влияние проницаемости на долевое содержание разных типов остаточной нефти в процессе вытеснения. Результаты исследований демонстрируют влияние структуры порового пространства и смачиваемости на состояние остаточной нефти.

The influence of core properties on the state of residual oil in the process of oil displacement by water at the micro level is investigated. The pore size distribution, core permeability, dynamics and morphology of residual oil were studied. The analysis of the available experimental approaches to the study of the properties of the core and residual oil in the core samples showed that the existing methods do not provide complete information about the studied parameters. To solve these problems, it is proposed to use a combination of innovative relaxation-diffusion spectroscopy technology of nuclear magnetic resonance with traditional technology. A combination of mercury injection and nuclear magnetic resonance is used to measure the pore size distribution. The core permeability was determined using the nuclear magnetic resonance method. Two-dimensional nuclear magnetic resonance spectroscopy makes it possible to study the microscopic state of residual oil in an undisturbed core during the displacement process. With the help of the proposed methodology, a core study of the Shengli deposit in China was carried out. Pore size distributions were obtained, permeability and residual oil saturation at different stages of displacement were studied. Four types of residual oil are distinguished: strip-shaped (island), film, mesh, continuous. The influence of permeability on the fraction content of different types of residual oil in the process of displacement is shown. The research results demonstrate the influence of the pore space structure and wettability on the state of residual oil.

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The authors declare that there are no conflicts of interest present.