期刊
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
卷 184, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.petrol.2019.106589
关键词
Microfluidic; Enhanced oil recovery; Nanoparticles; Surfactant
资金
- Departamento Administrativo de Ciencia, Tecnologia e Innovacion de Colombia (COLCIENCIAS) [727-2015]
- CONICET (PIP2015)
- ANPCyT [PICT 4819, 1021]
- Universidad Nacional de Colombia, Universidad de Granada [3010388]
- Ecopetrol S.A.
- COLCIENCIAS [647, 064]
- Agencia Nacional de Hidrocarburos (ANH, Colombia)
- Ministerio de Ciencia, Innovacion y Universidades (Spain)
- FEDER [RTI2018-099224-B-I00]
- Junta de Andalucia [RMN-172]
The main objective of this work is to evaluate the effect of the simultaneous use of a surfactant mixture and magnetic iron core-carbon shell nanoparticles on oil recovery via a microfluidic study based on the rock-on-achip technology. The surfactant solution used for all experiments was prepared based on a field formulation and consisted of a mixture of a hydrophilic and a lipophilic surfactant. Magnetic iron core-carbon shell nanoparticles with a mean particle size of 60 nm and a surface area of 123 m(2)g(-1) were employed. The displacement experiments consisted of waterflooding, surfactant flooding and nanoparticle-surfactant flooding and were performed using PDMS (polydimethylsiloxane)-glass microdevices type random network. The characteristics and design of the microfluidic device allowed to emulate a mixed wettability of a porous medium. Then, the oil was displaced by injecting the solution at a constant injection rate, until steady-state conditions were obtained. Furthermore, the effect of three injection rates corresponding to 0.1 ft day(-1), 1 ft day(-1), and 10 ft day(-1) was investigated. The increase in the injection rate favored the oil recovery percentage. In addition, for all injection rates, the oil recovery decreased in the following order: nanoparticle-surfactant flooding > surfactant flooding > waterflooding. The nanoparticle-surfactant system at the injection rate of 1.9 mu L min(-1) presented the highest oil recovery (i.e., 84%). Likewise, nanoparticle-surfactant flooding showed a more stable displacement front and consequently, the highest capillary number among the injection fluids. Oil recovery by waterflooding was the lowest among the evaluated systems due to the viscous fingering phenomena under different injection rates. In addition, it can be observed that for all injection rates, the presence of the surfactant mixture and nanoparticles reduce the viscous fingering effect. The results can be used to visually and quantitatively analyze the role of the simultaneous use of nanoparticles with surfactants in enhanced oil recovery processes.
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