Influence of Reservoir Microstructure on the State of Residual Oil According to Nuclear Magnetic Resonance (NMR) Spectroscopy
https://doi.org/10.18599/grs.2024.1.8
Abstract
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.
About the Authors
Jiali Mo
National University of Oil and Gas “Gubkin University
Russian Federation
Russian Federation
Mo Jiali – Graduate student
Build. 1, 65, Leninsky ave., Moscow, 119991
N. N. Mikhailov
National University of Oil and Gas “Gubkin University”; Institute of Oil and Gas Problems of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nikolai N. Mikhailov – Dr. Sci. (Technical Sciences), Professor; Chief Researcher
Hengyang Wang
Sinopec Research Institute of Petroleum Engineering
China
China
Wang Hengyang – PhD (Technical Sciences), Associate Researche
197 Baisha Road, Beijing, 102206
References
1. Arns Ch.H. (2004). A comparison of pore size distributions derived by NMR and X-ray-CT techniques. Physica A: Statistical Mechanics and Its Applications, 339(1–2), pp. 159–165. https://doi.org/10.1016/j.physa.2004.03.033
2. Azizoglu Z., Garcia A.P., Newgord Ch., Heidari Z. (2020). Simultaneous Assessment of Wettability and Water Saturation Through Integration of 2D NMR and Electrical Resistivity Measurements. SPE Annual Technical Conference and Exhibition, SPE-201519-MS. https://doi.org/10.2118/201519-MS
3. Chen J., Hirasaki G.J., Flaum M. (2006). NMR wettability indices: Effect of OBM on wettability and NMR responses. Journal of Petroleum Science and Engineering, 52(1–4), pp. 161–171, https://doi.org/10.1016/j.petrol.2006.03.007
4. Coates G.R., Miller M., Gillen M., Henderson C. (1991). The MRIL In Conoco 33-1 An Investigation Of A New Magnetic Resonance Imaging Log. SPWLA 32nd Annual Logging Symposium, SPWLA-1991-DD.
5. Kenyon W.E. (1997). Petrophysical Principles of Applications of NMR Logging. The Log Analyst, 38(2), SPWLA-1997-v38n2a4.
6. Kenyon W.E., Day P.I., Straley C., Willemsen J.F. (1988). A Three-Part Study of NMR Longitudinal Relaxation Properties of Water-Saturated Sandstones. SPE Formation Evaluation, 3(3), pp. 622–636, https://doi.org/10.2118/15643-pa
7. Kleinberg R.L., Straley C., Kenyon W.E., Akkurt R., Farooqui S.A. (1993). Nuclear Magnetic Resonance of Rocks: T1 vs. T2. SPE Annual Technical Conference and Exhibition, SPE-26470-MS. ttps://doi.org/10.2118/26470-MS
8. Melekhin S.V., Mikhailov N.N. (2017) Laboratory modeling of residual oil mobilization in flooded reservoirs. SPE Russian Petroleum Technology Conference. SPE-187887-MS. https://doi.org/10.2118/187887-MS
9. Mikhailov N.N. (1992). Residual oil saturation of the developed formations. Moscow: Nedra, 272 p. (In Russ.)
10. Mikhailov N.N. (2011). Petrophysical support of new technologies for the recovery of residual oil from technogenically altered deposits. Karotazhnik, 7(205), pp. 126–137. (In Russ.)
11. Sulucarnain I., Sondergeld C.H., Rai C.S. (2012). An NMR Study of Shale Wettability and Effective Surface Relaxivity. All Days. SPE Canadian Unconventional Resources Conference, SPE-162236-MS. https://doi.org/10.2118/162236-ms
12. Sun Zh., Jia L., Zhang L., Sun B., Zhang Y. (2017). Application of NMR Technology in Pore Structure Evaluation for Low-Permeability and Low-Viscosity Oil Reservoirs. Xinjiang Petroleum Geology, 38(6), pp. 735–739. https://doi.org/10.7657/XJPG20170617
13. Tchistiakov A.A., Shvalyuk E.V., Kalugin A.A.(2022). The rock typing of complex clastic formation by means of computed tomography and nuclear magnetic resonance. Georesursy = Georesources, 24(4), pp. 102–116. (In Russ.) https://doi.org/10.18599/grs.2022.4.9
14. Yan W., Sun J., Dong H., Cui L. (2021). Investigating NMR-based absolute and relative permeability models of sandstone using digital rock techniques. Journal of Petroleum Science and Engineering, 207, 109105. https://doi.org/10.1016/j.petrol.2021.109105
Review
For citations:
Mo J., Mikhailov N.N., Wang H. Influence of Reservoir Microstructure on the State of Residual Oil According to Nuclear Magnetic Resonance (NMR) Spectroscopy. Georesursy = Georesources. 2024;26(1):100-108. https://doi.org/10.18599/grs.2024.1.8
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