TY  - JOUR
N2  - Large amount of crude oil remains in the reservoir due to the poor sweep and displacement efficiency after displacing fluid injection. To remediate this effect, a thicker displacing fluid is used to reduce viscous fingering for a more stable flood front. A ferrofluid is a suitable candidate due to the tunable viscosity profile when subjected to a magnetic field 1. In this work, the ability of cobalt substituted magnetite ferrofluid to improve incremental recovery after waterflooding has been investigated via sand pack flooding. Prior to sand pack flooding, structural and magnetic properties of cobalt substituted magnetite nanoparticles were characterized via XRD, FESEM and VSM. Viscosity tests with field strength variation from 0 to 66.88 mT have shown a significant dependency of the ferrofluid's viscosity on the applied field strength. 6-fold increment of viscosity was recorded when magnetic field strength changes from 19.5 to 66.88 mT. During sand pack flooding, 7.20% of incremental oil was obtained with the ferrofluid injection, even without the presence of a magnetic field. When subjected to a magnetic field, 12.93% and 15.83% of the incremental oil was obtained at 19.5 and 66.88 mT, respectively. It is proven that increase of ferrofluid viscosity with magnetic field strength results in higher incremental recovery. Improved sweep and displacement efficiency has been achieved by injecting the ferrofluid into the oil reservoir. © 2019 Trans Tech Publications, Switzerland
ID  - scholars12235
KW  - Cobalt; Cobalt compounds; Crude oil; Efficiency; Floods; Magnetic fields; Magnetic fluids; Magnetite; Magnetite nanoparticles; Nanomagnetics; Oil fields; Oil well flooding; Petroleum reservoir engineering; Petroleum reservoirs; Viscosity
KW  -  Displacement efficiency; Enhanced oil recovery; Field strengths; Fluid injections; Magnetic field strengths; Structural and magnetic properties; Tunable viscosity; Viscous fingering
KW  -  Enhanced recovery
Y1  - 2019///
JF  - Defect and Diffusion Forum
A1  - Soleimani, H.
A1  - Latiff, N.R.A.
A1  - Yahya, N.
A1  - Zaid, H.M.
A1  - Sabet, M.
A1  - Lee, K.C.
A1  - Adil, M.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061914136&doi=10.4028%2fwww.scientific.net%2fDDF.390.161&partnerID=40&md5=f408888bb84bd15f6fd1a8f01367a167
VL  - 390
AV  - none
N1  - cited By 8
SP  - 161
TI  - Magnetization of ferrofluid and its influence on improving oil recovery
PB  - Trans Tech Publications Ltd
SN  - 10120386
EP  - 167
ER  -