Труды сотрудников института физики

/ M. I. Pryazhnikov, V. A. Zhigarev, A. V. Minakov, I. V. Nemtsev // Capillarity. - 2024. - Vol. 10, Is. 3. - P. 73-86, DOI 10.46690/capi.2024.03.02. - Cited References: 53. - This work is partially financed by Ministry of Science and Higher Education of the Russian Federation (No. FSRZ2020-0012) . - ISSN 2709-2119. - ISSN 2652-3310
Аннотация: Experimental oil displacement as a result of spontaneous imbibition of silica nanosols has been carried out using two types of sandstone as the reservoir rock. The permeability of the cores ranged from 0.34 to 333 mD, while the porosity was 11% and 22%, respectively. During the research, the influence of the concentration and nanoparticle size, as well as the permeability of the rock, on the process of spontaneous imbibition, was studied. Silica nanosols were considered as an object of study. The nanoparticle size ranged from 10 to 35 nm. The mass concentration of nanoparticles varied from 0.01% to 0.25%. It was found that the use of silica nanosols significantly increases the rate of the spontaneous imbibition process. It was established that a silica nanosol with a nanoparticle size of 10 nm and a concentration of 0.25% allows to displace more than six times oil compared to the reservoir water model in the same time. As a result, it was shown that the oil displacement efficiency and the efficiency of spontaneous imbibition increase along with an increase in the nanoparticle concentration and a decrease in the nanoparticle size.

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Держатели документа:
Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserve, Siberian Federal University, Krasnoyarsk 660041, Russia
Laboratory of Heat Exchange Control in Phase and Chemical Transformations, Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk 630090, Russia
Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk 660036, Russia
Laboratory of molecular spectroscopy, L.V. Kirensky Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Pryazhnikov, M. I.; Zhigarev, V. A.; Minakov, A. V.; Nemtsev, I. V.; Немцев, Иван Васильевич

/ V. A. Zhigarev, M. I. Pryazhnikov, A. D. Skorobogatova [et al.] // Pet. Res. - 2025. - Vol. 10, Is. 2. - P. 432-442, DOI 10.1016/j.ptlrs.2025.01.004. - Cited References: 36. - This work is partially financed by Ministry of Science and Higher Education of the Russian Federation (project no. FSRZ-2020-0012) . - ISSN 2096-2495. - ISSN 2524-1729
   Перевод заглавия: Сравнение влияния наножидкостей при капиллярной имбибиции с традиционными вытесняющими жидкостями
Аннотация: The effectiveness of surfactant solutions, polymers and nanosuspensions in capillary imbibition was studied comparatively. Two series of experiments on capillary imbibition with displacing liquids from cores saturated with low-viscosity (4.2 mPa s) and high-viscosity (28.9 mPa s) oil were performed. Water, a polymer solution of polyacrylamide, surfactant solutions (AES and SDS), as well as suspensions of spherical nanoparticles were considered as displacing fluids. The mass concentration of the substances varied from 0.05 to 0.25%. The rate of change in the volume of the displaced oil for 0.1% AES solution and suspension 1030 over time was greater than for other displacing liquids. The smallest increase in the volume of displaced oil was observed for the polymer solution. The coefficient of low-viscosity oil displacement from sandstone by water as a result of capillary imbibition was found to be 58%. When using surfactant solutions and suspensions, an increase in the oil displacement coefficient was observed: the SDS solution increased the capillary imbibition rate by 4%, and the suspension of SiO2 nanoparticles (10 nm) gave a 3% increase. The polyacrylamide solution reduced the capillary imbibition rate by 12%. In the series with higher oil viscosity, the effect of additives was more significant. The rate of capillary imbibition increased by 22% in the case of 0.1% SDS solution and by 24% for 0.1% SiO2 suspension (10 nm). The analysis of the factors influencing the displacement coefficient during capillary imbibition with solutions of surfactants, polymers and nanosuspensions was carried out. It has been shown that nanosuspensions are not inferior to surfactant solutions and leave polymer solutions far behind in terms of their positive effect on the oil displacement coefficient.

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Держатели документа:
Siberian Federal University, 660041, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center "Krasnoyarsk Scientific Center", Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zhigarev, V. A.; Pryazhnikov, M. I.; Skorobogatova, A. D.; Pryazhnikov, A. I.; Minakov, A. V.; Zharkov, S. M.; Жарков, Сергей Михайлович