Investigation on mixed oil-cement for wellbore integrity using acoustic velocity

Oilwell cementing is part of completing a well prior to production. As a casing is installed after a section of the well is drilled, cement is pumped downhole. Reservoir fluid such as oil which may encroach into the wellbore due to naturally fractured or unconsolidated formation would mix with the c...

Full description

Main Authors: Ridha, S., Lubis, L.A., Setiawan, R.A., Razif Mohar, J.M.B.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.20269 /
Published: Trans Tech Publications Ltd 2017
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027050976&doi=10.4028%2fwww.scientific.net%2fKEM.740.190&partnerID=40&md5=29b5d00664e8e49dea693528e0947cd3
http://eprints.utp.edu.my/20269/
Tags: Add Tag
No Tags, Be the first to tag this record!
id utp-eprints.20269
recordtype eprints
spelling utp-eprints.202692018-04-23T01:01:27Z Investigation on mixed oil-cement for wellbore integrity using acoustic velocity Ridha, S. Lubis, L.A. Setiawan, R.A. Razif Mohar, J.M.B. Oilwell cementing is part of completing a well prior to production. As a casing is installed after a section of the well is drilled, cement is pumped downhole. Reservoir fluid such as oil which may encroach into the wellbore due to naturally fractured or unconsolidated formation would mix with the cement pumped downhole. Recent studies have shown that the presence of oil affect cement quality to an extent where the cement compressive strength is greatly reduced. Early detection of possible oil contamination into cement may prevent well integrity problem. With intense application of acoustic principle into wellbore, however, not many references available to detect the presence of oil in cement system using this principle. This study investigates whether acoustic waves can detect oil in cement. Class G cement is mixed with both water and brine where crude oil is then added to the mixture. The resulting slurry were cured using High Pressure High Temperature (HPHT) curing chamber at 120°C and 4,000 psi for 24 hours and is then cored into 1-inch cylinder. SonicViewer-SX is used to propagate acoustic waves through the core sample where the transit time is recorded and analyzed. It is found that oil can be detected in cement using acoustic waves since oil-filled samples have slower P-waves and S-waves velocities than cement-filled samples. The case is also proven when water is replaced by brine as the mixing fluid which oil-filled samples have lower P-waves and S-waves velocities to that of cement-filled samples. © 2017 Trans Tech Publications, Switzerland. Trans Tech Publications Ltd 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027050976&doi=10.4028%2fwww.scientific.net%2fKEM.740.190&partnerID=40&md5=29b5d00664e8e49dea693528e0947cd3 Ridha, S. and Lubis, L.A. and Setiawan, R.A. and Razif Mohar, J.M.B. (2017) Investigation on mixed oil-cement for wellbore integrity using acoustic velocity. Key Engineering Materials, 740 KE . pp. 190-194. http://eprints.utp.edu.my/20269/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Oilwell cementing is part of completing a well prior to production. As a casing is installed after a section of the well is drilled, cement is pumped downhole. Reservoir fluid such as oil which may encroach into the wellbore due to naturally fractured or unconsolidated formation would mix with the cement pumped downhole. Recent studies have shown that the presence of oil affect cement quality to an extent where the cement compressive strength is greatly reduced. Early detection of possible oil contamination into cement may prevent well integrity problem. With intense application of acoustic principle into wellbore, however, not many references available to detect the presence of oil in cement system using this principle. This study investigates whether acoustic waves can detect oil in cement. Class G cement is mixed with both water and brine where crude oil is then added to the mixture. The resulting slurry were cured using High Pressure High Temperature (HPHT) curing chamber at 120°C and 4,000 psi for 24 hours and is then cored into 1-inch cylinder. SonicViewer-SX is used to propagate acoustic waves through the core sample where the transit time is recorded and analyzed. It is found that oil can be detected in cement using acoustic waves since oil-filled samples have slower P-waves and S-waves velocities than cement-filled samples. The case is also proven when water is replaced by brine as the mixing fluid which oil-filled samples have lower P-waves and S-waves velocities to that of cement-filled samples. © 2017 Trans Tech Publications, Switzerland.
format Article
author Ridha, S.
Lubis, L.A.
Setiawan, R.A.
Razif Mohar, J.M.B.
spellingShingle Ridha, S.
Lubis, L.A.
Setiawan, R.A.
Razif Mohar, J.M.B.
Investigation on mixed oil-cement for wellbore integrity using acoustic velocity
author_sort Ridha, S.
title Investigation on mixed oil-cement for wellbore integrity using acoustic velocity
title_short Investigation on mixed oil-cement for wellbore integrity using acoustic velocity
title_full Investigation on mixed oil-cement for wellbore integrity using acoustic velocity
title_fullStr Investigation on mixed oil-cement for wellbore integrity using acoustic velocity
title_full_unstemmed Investigation on mixed oil-cement for wellbore integrity using acoustic velocity
title_sort investigation on mixed oil-cement for wellbore integrity using acoustic velocity
publisher Trans Tech Publications Ltd
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85027050976&doi=10.4028%2fwww.scientific.net%2fKEM.740.190&partnerID=40&md5=29b5d00664e8e49dea693528e0947cd3
http://eprints.utp.edu.my/20269/
_version_ 1741196344727437312
score 11.62408

Similar Items