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Effect of saturation alteration on wellbore stability during WAG Injection

Nowadays, enhanced oil recovery (EOR) injection methods are very popular due to its simplicity and effectiveness in increasing the recovery. The water alternating gas (WAG) injection method shows higher sweep efficiency and recovery than the one-phase fluid injection. However, extremely high injecti...

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Main Authors: Bataee, M., Hamdi, Z., Irawan, S., Ashena, R., Ghassemi, M.F.
Format: Article
Published: Society of Petroleum Engineers 2017
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041109638&partnerID=40&md5=eb10f4ca390a5d6b10fa8d01ec305007
http://eprints.utp.edu.my/20342/
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spelling my.utp.eprints.203422018-04-23T01:05:08Z Effect of saturation alteration on wellbore stability during WAG Injection Bataee, M. Hamdi, Z. Irawan, S. Ashena, R. Ghassemi, M.F. Nowadays, enhanced oil recovery (EOR) injection methods are very popular due to its simplicity and effectiveness in increasing the recovery. The water alternating gas (WAG) injection method shows higher sweep efficiency and recovery than the one-phase fluid injection. However, extremely high injection pressure will fracture the wellbore. Moreover, the saturation alteration changes the rock mechanical properties and stress values around the wellbore. The purpose of this study is to study the effects of saturation alteration on wellbore stability. This study has implemented with modelling procedure regarding the obtained experimental results from modified triaxial testing device. The core holder for this device is exclusively designed to prepare the favourable data of rock mechanical properties for different saturation schemes. The parameters of pressures, saturations, and stresses were obtained for the WAG flow using numerical modelling. For the pressures and saturation values, finite difference method (FDM) was used and to solve the rock stress values, finite volume method (FVM) was applied. According to experimental results, the recorded maximum axial stress was higher than the water and oil saturated cases (48.19 respected to 42.33 and 41.28). It indicates that the formation was more resistive to failuire for gas injection. However, after modelling, it was concludedthat the formation was more unstable in the gas injection case because of higher pressure transient. Therefore, the possibility of wellbore failure was higher during gas injection rather than water injection. Copyright 2017, Society of Petroleum Engineers. Society of Petroleum Engineers 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041109638&partnerID=40&md5=eb10f4ca390a5d6b10fa8d01ec305007 Bataee, M. and Hamdi, Z. and Irawan, S. and Ashena, R. and Ghassemi, M.F. (2017) Effect of saturation alteration on wellbore stability during WAG Injection. Society of Petroleum Engineers - SPE Russian Petroleum Technology Conference 2017 . http://eprints.utp.edu.my/20342/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description Nowadays, enhanced oil recovery (EOR) injection methods are very popular due to its simplicity and effectiveness in increasing the recovery. The water alternating gas (WAG) injection method shows higher sweep efficiency and recovery than the one-phase fluid injection. However, extremely high injection pressure will fracture the wellbore. Moreover, the saturation alteration changes the rock mechanical properties and stress values around the wellbore. The purpose of this study is to study the effects of saturation alteration on wellbore stability. This study has implemented with modelling procedure regarding the obtained experimental results from modified triaxial testing device. The core holder for this device is exclusively designed to prepare the favourable data of rock mechanical properties for different saturation schemes. The parameters of pressures, saturations, and stresses were obtained for the WAG flow using numerical modelling. For the pressures and saturation values, finite difference method (FDM) was used and to solve the rock stress values, finite volume method (FVM) was applied. According to experimental results, the recorded maximum axial stress was higher than the water and oil saturated cases (48.19 respected to 42.33 and 41.28). It indicates that the formation was more resistive to failuire for gas injection. However, after modelling, it was concludedthat the formation was more unstable in the gas injection case because of higher pressure transient. Therefore, the possibility of wellbore failure was higher during gas injection rather than water injection. Copyright 2017, Society of Petroleum Engineers.
format Article
author Bataee, M.
Hamdi, Z.
Irawan, S.
Ashena, R.
Ghassemi, M.F.
spellingShingle Bataee, M.
Hamdi, Z.
Irawan, S.
Ashena, R.
Ghassemi, M.F.
Effect of saturation alteration on wellbore stability during WAG Injection
author_facet Bataee, M.
Hamdi, Z.
Irawan, S.
Ashena, R.
Ghassemi, M.F.
author_sort Bataee, M.
title Effect of saturation alteration on wellbore stability during WAG Injection
title_short Effect of saturation alteration on wellbore stability during WAG Injection
title_full Effect of saturation alteration on wellbore stability during WAG Injection
title_fullStr Effect of saturation alteration on wellbore stability during WAG Injection
title_full_unstemmed Effect of saturation alteration on wellbore stability during WAG Injection
title_sort effect of saturation alteration on wellbore stability during wag injection
publisher Society of Petroleum Engineers
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041109638&partnerID=40&md5=eb10f4ca390a5d6b10fa8d01ec305007
http://eprints.utp.edu.my/20342/
_version_ 1738656197840470016
score 13.211869

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