Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process

Foam is purposely used in some of the Enhanced Oil Recovery (EOR) displacement processes in order to control the mobility ratio, hence improving the volumetric sweep efficiency. The efficiency of a foam displacement process in EOR depends largely on the stability of the foam films. In laboratory, fo...

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Main Author:	Omar, Shaziera
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/79519/1/ShazieraOmarPFChE2017.pdf
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spelling	my-utm-ep.795192018-10-31T12:52:59Z Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process 2017 Omar, Shaziera TP Chemical technology Foam is purposely used in some of the Enhanced Oil Recovery (EOR) displacement processes in order to control the mobility ratio, hence improving the volumetric sweep efficiency. The efficiency of a foam displacement process in EOR depends largely on the stability of the foam films. In laboratory, foam stability is usually measured through physical observation of the foam bubble in a glass tube. Unfortunately, this direct observation is not possible in the reservoir. Therefore, indirect measurement such as the measurement of electrokinetic signal would be a better alternative. This study aimed to determine the correlation between the foam stability and the associated streaming potential signals which resulted from the flowing fluid in foam assisted water alternate gas (FAWAG) process. The downhole monitoring of streaming potential which uses electrodes mounted on the outside of an insulated casing is a promising new technology for monitoring fluid movement processes in real time. In this study, the experiments were divided into two: Foam stability test and electrokinetic signal measurement. The electrokinetic signals were measured using five non-polarizing Cu/CuCl electrodes, installed along a sand pack model and measurement was recorded continuously using NIDAS and the LabView software. Surfactant alternate gas was used to produce foams inside the porous media using five different Sodium Dodecyl Sulphate (SDS) concentrations, namely 2500, 5000, 7500, 10000 and 12500 ppm. The result from the experiment showed that 10000 ppm was an optimum concentration of SDS. Thus, the voltage (electrokinetic signal) decreased with an increase in foam stability up to optimum SDS concentration. While for 12500 ppm SDS concentration the electrokinetic signal increased as foam stability decreased. The burst of the foam bubbles had changed the pattern of electrokinetic signals. Although the voltage was small, i.e., ranging from 0 to 1 mV, it was still measureable. These results present new findings in the relationship between foam stability and electrokinetic signals generated in the FAWAG process. This fundamental knowledge can lead to developing a new approach in monitoring FAWAG processes in making the EOR process more efficient. 2017 Thesis http://eprints.utm.my/id/eprint/79519/ http://eprints.utm.my/id/eprint/79519/1/ShazieraOmarPFChE2017.pdf application/pdf en public phd doctoral Universiti Teknologi Malaysia, Faculty of Chemical & Energy Engineering Faculty of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Omar, Shaziera Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
description	Foam is purposely used in some of the Enhanced Oil Recovery (EOR) displacement processes in order to control the mobility ratio, hence improving the volumetric sweep efficiency. The efficiency of a foam displacement process in EOR depends largely on the stability of the foam films. In laboratory, foam stability is usually measured through physical observation of the foam bubble in a glass tube. Unfortunately, this direct observation is not possible in the reservoir. Therefore, indirect measurement such as the measurement of electrokinetic signal would be a better alternative. This study aimed to determine the correlation between the foam stability and the associated streaming potential signals which resulted from the flowing fluid in foam assisted water alternate gas (FAWAG) process. The downhole monitoring of streaming potential which uses electrodes mounted on the outside of an insulated casing is a promising new technology for monitoring fluid movement processes in real time. In this study, the experiments were divided into two: Foam stability test and electrokinetic signal measurement. The electrokinetic signals were measured using five non-polarizing Cu/CuCl electrodes, installed along a sand pack model and measurement was recorded continuously using NIDAS and the LabView software. Surfactant alternate gas was used to produce foams inside the porous media using five different Sodium Dodecyl Sulphate (SDS) concentrations, namely 2500, 5000, 7500, 10000 and 12500 ppm. The result from the experiment showed that 10000 ppm was an optimum concentration of SDS. Thus, the voltage (electrokinetic signal) decreased with an increase in foam stability up to optimum SDS concentration. While for 12500 ppm SDS concentration the electrokinetic signal increased as foam stability decreased. The burst of the foam bubbles had changed the pattern of electrokinetic signals. Although the voltage was small, i.e., ranging from 0 to 1 mV, it was still measureable. These results present new findings in the relationship between foam stability and electrokinetic signals generated in the FAWAG process. This fundamental knowledge can lead to developing a new approach in monitoring FAWAG processes in making the EOR process more efficient.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Omar, Shaziera
author_facet	Omar, Shaziera
author_sort	Omar, Shaziera
title	Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
title_short	Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
title_full	Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
title_fullStr	Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
title_full_unstemmed	Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
title_sort	correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical & Energy Engineering
granting_department	Faculty of Chemical & Energy Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/79519/1/ShazieraOmarPFChE2017.pdf
_version_	1747818246130630656

Correlation between foam stability and electrokinetic signal in foam assisted water alternate gas process

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