Enhanced Oil Recovery Using Em Waves

Nowadays, there are four common methods of Enhanced Oil Recovery (EOR) used
in the industry which are included Thermal recovery, Chemical injection, Gas
injection and Seismic approach. This project is about to improve the existing EOR
methods where EM waves is going to be used as a safer, cheaper, reusable and
simple tool that can help to increase the production of crude oil in industry. The
mechanism that would help to improve the oil mobility is the EM wave’s
propagation itself where during this propagation, a kind of energy is actually being
transferred from a point to a point. A source of frequency to the transmitter is
supplied so that it can transmit and transfer the energy to the crude oil and this
energy would cause the molecules in the crude oil to vibrate, moving apart more
frequently and thus this will help the mobility of the oil itself. For sea bed logging
application, we cannot achieve the fluid resonance frequency which is few Mega
hertz because it may cause the EM waves is not penetrating to the focus point
(reservoir) due to nearer skin depth. The skin depth equation
ωμσ
δ = 2 is referred
in order to know how much EM waves could penetrate and diffuse into the reservoir,
where σ is electrical conductivity, μ is magnetic permeability and ω is the angular
frequency of the current.
Therefore, 1 KHz of frequency is used as the transmitter source in order to make sure
that EM waves could diffuse into the core sample and transfer energy to the crude oil
molecules. Shape and size of the transmitter would determine how efficient it is in
extracting energy from the radio waves and due to this reason, a transmitter with
hexagon shape is designed so that it can transmit a powerful EM waves to the core
rock sample.
In the experiments conducted, it was concluded that the designed transmitter with
nanoparticle magnetic feeder and amplifier could has a recovery of 10-12%OOIP.
The field strength was increase by 96.7% when two magnetic feeders with diameter
of 0.5cm and amplifier are used together with the transmitter.