ENHANCED OIL RECOVERY BY FLOODING WITH HYDROPHILIC NANOPARTICLES

作     者：Binshan Ju Tailiang Fan Mingxue Ma 

作者机构：School of Energy Resource China University of Geosciences Beijing 100083 P. R. China Weff-Log Research Center of Shengli Off-Field Dongying 257095 P. R. China 

出 版 物：《China Particuology》 (CHINA PARTICUOLOGY)

年 卷 期：2006年第4卷第1期

页      面：41-46页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：nanoparticle wettability change porous media enhance oil recovery mathematical model 

摘      要：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.