ef7b03132_si_001.pdf (172.83 kB)
Investigation of Spontaneous Imbibition by Using a Surfactant-Free Active Silica Water-Based Nanofluid for Enhanced Oil Recovery
journal contribution
posted on 2017-12-19, 00:00 authored by Yuyang Li, Caili Dai, Hongda Zhou, Xinke Wang, Wenjiao Lv, Mingwei ZhaoInterests
in using nanofluids for enhanced oil recovery (EOR) applications
has been increasing. Herein, a novel surfactant-free water-based nanofluid
for EOR was constructed using active silica nanoparticles. Active
silica nanoparticles were synthesized via condensation of hexanedioic
acid with the −OH group of silica. Water-based nanofluid was
obtained by transforming carboxyl into carboxylate on the surface
of active silica nanoparticles in water. The particle size of the
active silica nanoparticles in water ranged from 10 to 20 nm. The
interfacial activity of the nanoparticles was endowed through the
shape change of the active silica nanoparticle surface groups to minimize
their interface energy. The morphology and surface components of the
active silica nanoparticles were characterized by transmission electron
microscopy and Fourier transform infrared spectroscopy. The interfacial
activity of the active silica nanoparticles was proved through interfacial
tension and interfacial dilational modulus measurements. Active silica
nanoparticles exhibited a stronger ability to reduce interfacial tension
and enhance the interfacial film strength than silica nanoparticles.
Contact angle measurements showed that this nanofluid exhibited excellent
capabilities of oil displacement from a solid surface and wettability
alteration. Spontaneous imbibition tests of ultralow permeability
cores using different liquid phases (active silica nanofluid, silica
nanofluid and brine) were conducted. Oil recovery using active silica
nanofluid was higher than that of using silica nanofluid or brine.
Active silica nanofluid at a low concentration could display an equal
EOR efficiency with highly concentrated silica nanofluid. These results
indicated the possible application of the proposed active silica water-based
nanofluid in EOR. This preparation method could be used to prepare
surfactant-free active nanofluids, and the surfactant-free active
nanofluid shows great potential for EOR applications.
History
Usage metrics
Categories
Keywords
EORActive silica nanoparticlessilica water-based nanofluidultralow permeability coresActive silica nanofluidsilica nanofluidOHContact angle measurementssilica nanoparticle surface groupsoil recoverynovel surfactant-free water-based nanofluidEnhanced Oil Recovery Intereststransmission electron microscopySilica Water-Based Nanofluidsilica nanoparticlesSpontaneous imbibition testsdilational modulus measurements
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC