Enhanced oil recovery by flooding with hydrophilic nanoparticles--颗粒学报PARTICUOLOGY

Ju, B., Fan, T., & Ma, M. (2006). Enhanced oil recovery by flooding with hydrophilic nanoparticles. China Particuology, 4(1), 41–46. https://doi.org/10.1016/S1672-2515(07)60232-2

Enhanced oil recovery by flooding with hydrophilic nanoparticles

Binshan Ju ^a *, Tailiang Fan ^a, Mingxue Ma ^b

a School of Energy Resource, China University of Geosciences, Beijing 100083, P. R. China
b Well-Log Research Center of Shengli Oil-Field, Dongying 257096, P. R. China

10.1016/S1672-2515(07)60232-2

Volume 4, Issue 1, February 2006, Pages 41-46

Received 30 March 2005, Accepted 30 August 2005, Available online 14 December 2007.

E-mail: jubs2936@163.com

Highlights

Abstract

In this paper, the mechanism of enhanced oil recovery using lipophobic and hydrophilic polysilicon (LHP) nanoparticles ranging in size from 10 to 500 nm for changing the wettability of porous media was analysed theoretically. A one-dimensional two-phase mathematical model considering the migration and adsorption of LHP and wettability change in reservoir rock was proposed, and a simulator was developed to quantitatively predict the changes in relative and effective permeability of the oil and water phases and the oil recovery in sandstone after water driving. Numerical simulations were conducted to study the distribution of the particle concentration, the reduction in porosity and absolute permeability, the LHP volume retention on pore walls and in pore throats along a dimensionless distance, and oil production performance. In conclusion, oil recovery can obviously be improved by flooding with hydrophilic nanometer powders though permeability declines for the retention of nanoparticles in porous media. It is suggested that an LHP concentration ranging from 0.02 to 0.03 is preferable to enhance oil recovery.

Graphical abstract

Keywords

nanoparticle; wettability change; porous media; enhance oil recovery; mathematical model

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