TY - JOUR
T1 - Enhancing oil production using silica-based nanofluids
T2 - Preparation, stability, and displacement mechanisms
AU - Nguele, Ronald
AU - Sreu, Tola
AU - Inoue, Hiroki
AU - Sugai, Yuichi
AU - Sasaki, Kyuro
N1 - Funding Information:
This work is part of the Qdai-jump Research Program with project number 30233, which is (partly) financed by Kyushu University. The authors extend their acknowledgement to Mitsubishi Chemicals for supplying the polymers used in this study.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/8/14
Y1 - 2019/8/14
N2 - A novel two-step preparation of a silica nanofluid (Si-NF) with potential for light oil recovery is herein presented. It was observed that a Si-NF, prepared by dispersing silica nanoparticles (Si-NPs) in poly(vinyl alcohol) (1%) under carbon dioxide gas bubbling, is stable for 30 days at a temperature as high as 55 °C without any visible sedimentation. Unstable Si-NFs formed siliceous gels whose strength depends on Si-NP load. The spectral characterization revealed that prepared Si-NFs consisted of silanols, carbonyls, and alcohols. As part of an effort to enhance the light oil production (API 31°), 1, 0.5, and 0.1 wt % Si-NPs were injected in waterflooded Berea sandstone at 55 °C. An increase in oil as high as 7.6% was achieved for the Si-NF with the highest Si-NP load (1 wt % Si-NP). Oil production encompassed the discontinuity of Si-NFs, channel plugging, wettability, and interfacial tension alterations.
AB - A novel two-step preparation of a silica nanofluid (Si-NF) with potential for light oil recovery is herein presented. It was observed that a Si-NF, prepared by dispersing silica nanoparticles (Si-NPs) in poly(vinyl alcohol) (1%) under carbon dioxide gas bubbling, is stable for 30 days at a temperature as high as 55 °C without any visible sedimentation. Unstable Si-NFs formed siliceous gels whose strength depends on Si-NP load. The spectral characterization revealed that prepared Si-NFs consisted of silanols, carbonyls, and alcohols. As part of an effort to enhance the light oil production (API 31°), 1, 0.5, and 0.1 wt % Si-NPs were injected in waterflooded Berea sandstone at 55 °C. An increase in oil as high as 7.6% was achieved for the Si-NF with the highest Si-NP load (1 wt % Si-NP). Oil production encompassed the discontinuity of Si-NFs, channel plugging, wettability, and interfacial tension alterations.
UR - http://www.scopus.com/inward/record.url?scp=85070802911&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070802911&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.9b01629
DO - 10.1021/acs.iecr.9b01629
M3 - Article
AN - SCOPUS:85070802911
VL - 58
SP - 15045
EP - 15060
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
IS - 32
ER -