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INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD

The study was conducted to investigate the fundamental aspects of asphaltene precipitation during CO2 flooding in EOR applications. The oil samples used in this study are from peninsular Malaysia oilfield (PMO) and Sarawak oilfield (SKO). Asphaltenes precipitation during CO2 injection for EOR app...

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Main Author: W RAZAK, WAN NURUL ADYANI
Format: Thesis
Language:English
Published: 2013
Subjects:
TP Chemical technology
Online Access:http://utpedia.utp.edu.my/id/eprint/21132/1/2012-CHEMICAL-INVESTIGATION%20OF%20CRITICAL%20PARAMETERS%20AFFECTING%20ASPHAL%20TENES%20PRECIPITATION%20DURING%20CO2%20INJECION%20IN%20MALAYSIA%20OILFIELD-WAN%20NURUL%20ADYANI%20BT%20W%20RAZAK.pdf
http://utpedia.utp.edu.my/id/eprint/21132/
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spelling oai:utpedia.utp.edu.my:211322024-07-23T09:47:41Z http://utpedia.utp.edu.my/id/eprint/21132/ INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD W RAZAK, WAN NURUL ADYANI TP Chemical technology The study was conducted to investigate the fundamental aspects of asphaltene precipitation during CO2 flooding in EOR applications. The oil samples used in this study are from peninsular Malaysia oilfield (PMO) and Sarawak oilfield (SKO). Asphaltenes precipitation during CO2 injection for EOR applications in Malaysian oilfield was evaluated using Near-Infra-Red Solids-Detection-System (NIR-SDS). Five different samples from Malaysian oilfield were investigated in this study i.e. four bottomhole samples and one recombined sample. Variation in pressure, temperature and composition were thoroughly investigated to monitor their impact on CO2 induced asphaltenes precipitation tendency. Only two out of five samples shows tendency to develop asphaltenes precipitation problem during CO2 injection study. Variation in temperature shows no influence on asphaltene precipitation if the asphaltenes problem does not occur during pressure changes. (Only cover Reservoir Temperature and Wellhead Temperature). Physiochemical properties of the two samples were compared against the non�problematic samples. It was found that crude oil that has high GOR, high API and low molecular weight have higher propensity to create asphaltene precipitation problem during CO2 injection. Percentage of asphaltenes deposited and precipitated from depressurization test was recorded by HPHT filtration technique. Results show that most of solids asphaltenes in this case are in precipitation form and the deposited asphaltenes on PVT cell wall are a very small amount. Precipitated asphaltenes samples were then characterized by FTIR and NMR spectroscopy. The spectroscopic analysis found that the solids were mainly wax, while asphaltenes could be in a very small amount and was not detected by thesespectroscopy techniques. Asphaltene modeling was then conducted on five samples using AEOS (Association Equation of State) as underlying theory in the modeling tool named as DBR Solids software. Asphaltene precipitation modeling by this technique required tuning of binary interaction parameter and asphaltene molar volume. Comparison from asphaltene model and experimental works produce a similar result. 2013-12 Thesis NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/id/eprint/21132/1/2012-CHEMICAL-INVESTIGATION%20OF%20CRITICAL%20PARAMETERS%20AFFECTING%20ASPHAL%20TENES%20PRECIPITATION%20DURING%20CO2%20INJECION%20IN%20MALAYSIA%20OILFIELD-WAN%20NURUL%20ADYANI%20BT%20W%20RAZAK.pdf W RAZAK, WAN NURUL ADYANI (2013) INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD. Masters thesis, Universiti Teknologi PETRONAS.
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
W RAZAK, WAN NURUL ADYANI
INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD
description The study was conducted to investigate the fundamental aspects of asphaltene precipitation during CO2 flooding in EOR applications. The oil samples used in this study are from peninsular Malaysia oilfield (PMO) and Sarawak oilfield (SKO). Asphaltenes precipitation during CO2 injection for EOR applications in Malaysian oilfield was evaluated using Near-Infra-Red Solids-Detection-System (NIR-SDS). Five different samples from Malaysian oilfield were investigated in this study i.e. four bottomhole samples and one recombined sample. Variation in pressure, temperature and composition were thoroughly investigated to monitor their impact on CO2 induced asphaltenes precipitation tendency. Only two out of five samples shows tendency to develop asphaltenes precipitation problem during CO2 injection study. Variation in temperature shows no influence on asphaltene precipitation if the asphaltenes problem does not occur during pressure changes. (Only cover Reservoir Temperature and Wellhead Temperature). Physiochemical properties of the two samples were compared against the non�problematic samples. It was found that crude oil that has high GOR, high API and low molecular weight have higher propensity to create asphaltene precipitation problem during CO2 injection. Percentage of asphaltenes deposited and precipitated from depressurization test was recorded by HPHT filtration technique. Results show that most of solids asphaltenes in this case are in precipitation form and the deposited asphaltenes on PVT cell wall are a very small amount. Precipitated asphaltenes samples were then characterized by FTIR and NMR spectroscopy. The spectroscopic analysis found that the solids were mainly wax, while asphaltenes could be in a very small amount and was not detected by thesespectroscopy techniques. Asphaltene modeling was then conducted on five samples using AEOS (Association Equation of State) as underlying theory in the modeling tool named as DBR Solids software. Asphaltene precipitation modeling by this technique required tuning of binary interaction parameter and asphaltene molar volume. Comparison from asphaltene model and experimental works produce a similar result.
format Thesis
author W RAZAK, WAN NURUL ADYANI
author_facet W RAZAK, WAN NURUL ADYANI
author_sort W RAZAK, WAN NURUL ADYANI
title INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD
title_short INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD
title_full INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD
title_fullStr INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD
title_full_unstemmed INVESTIGATION OF CRITICAL PARAMETERS AFFECTING ASPHALTENES PRECIPITATION DURING C02 INJECTION IN MALAYSIAN OILFIELD
title_sort investigation of critical parameters affecting asphaltenes precipitation during c02 injection in malaysian oilfield
publishDate 2013
url http://utpedia.utp.edu.my/id/eprint/21132/1/2012-CHEMICAL-INVESTIGATION%20OF%20CRITICAL%20PARAMETERS%20AFFECTING%20ASPHAL%20TENES%20PRECIPITATION%20DURING%20CO2%20INJECION%20IN%20MALAYSIA%20OILFIELD-WAN%20NURUL%20ADYANI%20BT%20W%20RAZAK.pdf
http://utpedia.utp.edu.my/id/eprint/21132/
_version_ 1805891016796930048
score 13.222552

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