An Experimental Investigation of Magnetized Water Effect on Formation
Damage
Ehsan Khamehchi *, Seyed Arman Hosseini Kaldozakh, and Ali Alizadeh
Department of Petroleum Engineering, Amirkabir University of Technology, Tehran, Iran
ABSTRACT
In oil industries, water injection into oil reservoirs for pressure maintenance, oil displacement, and oil
recovery is a common technique. Formation damage during water injection is a major problem in this
process. Formation damage from the incompatibility of formation water (FW) and injection water (IW)
causes a reduction in the permeability around the injection wells. Therefore, it is necessary that the
formation damage be minimized using specific techniques such as the injection of scale inhibitors and
water compatible with formation water. It has been proven that moving water through relatively weak
magnetic field changes water properties. These changes involve density, electrical conductivity, salts
dissolving ability, sedimentation rate of solid particles etc. This study was conducted to investigate the
effect of magnetized water injection on the decline in rock permeability. Therefore, a magnetic field device
was designed and combined with a formation damage setup. The results indicate that, in the presence of
magnetic field, water injection causes less damage to rock, and the permeability reduction in this case is
lower than when non-magnetized water is injected. In addition, the results show that a higher magnetic
field flux reduces the permeability damage.
Keywords: Formation Damage, Water Injection, Magnetized Water, Scale Precipitation
http://jpst.ripi.ir/article_812_304a6ef61fdc09d138d9fc8ee60f595f.pdf