Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.11698/PED.2021.04.15
Ключевые слова: enhanced oil recovery, fluid volume method, nanofluid flooding, pore scale modeling
Аннотация: The numerical modeling of oil displacement by nanofluid based on three-dimensional micromodel of cores with different permeability was carried out by the volume of fluid (VOF) method with experimentally measured values of interfacial tension, contact angle and viscosity. Water-based suspensions of SiO2 nanoparticles with a concentrПоказать полностьюation of 0-1% and different particle sizes were considered to study the effect of concentration and size of nanoparticles, displacement fluid flow rate, oil viscosity and core permeability on the efficiency of oil displacement by nanofluid. The oil recovery factor (ORF) increases with the increase of mass fraction of nanoparticles. An increase in nanoparticles' concentration to 0.5% allows an increase in ORF by about 19% compared to water flooding. The ORF increases with the decrease of nanoparticle size, and declines with the increase of displacing rate. It has been shown that the use of nanosuspensions for enhanced oil recovery is most effective for low-permeable reservoirs with highly viscous oil in injection modes with capillary number close to the immobilization threshold, and the magnitude of oil recovery enhancement decreases with the increase of displacement speed. The higher the oil viscosity, the lower the reservoir rock permeability, the higher the ORF improved by nanofluids will be. © 2021, The Editorial Board of Petroleum Exploration and Development. All right reserved.
Журнал: Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development
Выпуск журнала: Vol. 48, Is. 4
Номера страниц: 825-834
ISSN журнала: 10000747
Издатель: Science Press