ENHANCED OIL RECOVERY (EOR) BY USING EM TRANSMITTER AND COBALT FERRITE MAGNETIC NANOPARTICLES

It is practically impossible to extract crude oil from a reservoir completely.
There are four common methods of Enhanced Oil Recovery (EOR) used in the
industry which are thermal recovery; chemical injection; gas injection; and
ultrasonic approach. The idea of this project is to improve the existing Enhanced
Oil Recovery (EOR) methods, where Electromagnetic (EM) transmission system
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. This project deals with synthesis
of cobalt ferrite, CoFez04. nanoparticles via sol- gel method. Crystallography,
chemical composition and morphology of the samples were analyzed by using XRay
Diffractometer (XRD), Field Emission Scanning Electron Microscope
(FESEM) and Energy Dispersive X-Ray (EDX). By using XRD result, the
crystallite size of the mixture annealed at 800°C is 5.117lnm, calculated by using
Scherer's equation. FESEM result shows the grain size is in range 26nm-36nm.
From EDX result, Cobalt ferrite sample anneal at 800°C is chosen because it has
lower standard deviation of Co, Fe, and 0 which are 24%, 7.18% and 9.59%
respectively. The initial permeability of cobalt ferrite powder was found to
increase and relative loss factor decreased at high frequency. Hence, cobalt ferrite
prepared at 800°C exhibit good crystal structure, fine grain size, and good
magnetic properties. Cobalt ferrite nanofluid was prepared by dispersing 5g cobalt
ferrite nanopowder and 5g Sodium Dodecyl Sulphate (SDS) in SOOml deionized
water and ultrasonicated for 2 hours, which then injected into a packed glass bead
column (reservoir model). Electromagnetic (EM) wave transmission system is
used with nanofluid injection to the reservoir model that helps to reduce the
interfacial tension of the oil and water. This is because the nanofluid (cobalt
ferrite) plays as electromagnetic wave absorption material, where the molecules
start to vibrate, moving apart more frequently and thus disturb the compatibility at
oil-water interfaces. Hence, the mobility of oil will improve. After conducting experiment with transmitter with nanofluid injection, about 31.58% oil IS
recovered from residual oil in place (ROIP).