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Journal V.26.No.1.2024
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Influence of Reservoir Microstructure on the State of Residual Oil According to Nuclear Magnetic Resonance (NMR) Spectroscopy

Mo Jiali, N.N. Mikhailov, Wang Hengyang

Original article

DOI https://doi.org/10.18599/grs.2024.1.8

100-108
rus.
eng.

open access

Under a Creative Commons license

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 Oil Field 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.

 

types of residual oil, pore space structure, relaxation-diffusion two-dimensional NMR spectroscopy

 

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Mo Jiali – Graduate student, National University of Oil and Gas “Gubkin University”
Build. 1, 65, Leninsky ave., Moscow, 119991, Russian Federation
e-mail: mojiali111@gmail.com

Nikolai N. Mikhailov – Dr. Sci. (Technical Sciences), Professor, National University of Oil and Gas “Gubkin University”; Chief Researcher, Institute of Oil and Gas Problems of the Russian Academy of Sciences
Build. 1, 65, Leninsky ave., Moscow, 119991, Russian Federation
e-mail: folko200@mail.ru

Wang Hengyang – PhD (Technical Sciences), Associate Researcher, Sinopec Research Institute of Petroleum Engineering
197 Baisha Road, Beijing, 102206, China
e-mail: wanghengyang716@mail.com

 

For citation:

Jiali Mo, Mikhailov N.N., Hengyang Wang (2024). Influence of Reservoir Microstructure on the State of Residual Oil According to Nuclear Magnetic Resonance (NMR) Spectroscopy. Georesursy = Georesources, 26(1), pp. 100–108. https://doi.org/10.18599/grs.2024.1.8

 

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