Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions

The relationship between quartz surface textural defects (derived from weathering and diagenesis), palaeo-depositional environment and reservoir quality were studied using Tertiary outcrop rock samples obtained from the Belait and Lambir formations of the Sarawak Basin, Malaysia. Thin sections were...

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Main Authors: Ali, A.M., Padmanabhan, E.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.31042 /
Published: Science Press 2014
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84916195727&doi=10.11698%2fPED.2014.06.07&partnerID=40&md5=559b4534ae15fb8388210b9427e9cfd7
http://eprints.utp.edu.my/31042/
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spelling utp-eprints.310422022-03-25T08:53:19Z Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions Ali, A.M. Padmanabhan, E. The relationship between quartz surface textural defects (derived from weathering and diagenesis), palaeo-depositional environment and reservoir quality were studied using Tertiary outcrop rock samples obtained from the Belait and Lambir formations of the Sarawak Basin, Malaysia. Thin sections were used for mineral identification and to make observations regarding grain size and texture. Morphological characterization of the samples was performed using scanning electron microscopy (SEM) attached with energy-dispersive X-ray spectrometry (EDX) system, to show variations in quartz surface texture. The SEM images of Belait conglomerates reveal euhedral quartz crystals characterized with prominent mechanical weathering defects (such as straight and conchoidal fractures and striations). Conversely, the analysis of the Lambir sandstones identified chemical weathering features (such as chemical etchings, pitting, solution pits and notches). On the basis of petrology, SEM and CT scan images, evaluation results of reservoir quality indicate that the Lambir Formation in this study area is high-energy coast deposit, with apparent tide-dominated features; while Belait Formation is neritic-delta deposit, with obvious wave-dominated features; reservoir quality of the Belait Formation and Lambir Formation are poor, but the porosity of the Belait Formation is relatively higher than that of the Lambir Formation. ©, 2014, Science Press. All right reserved. Science Press 2014 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84916195727&doi=10.11698%2fPED.2014.06.07&partnerID=40&md5=559b4534ae15fb8388210b9427e9cfd7 Ali, A.M. and Padmanabhan, E. (2014) Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions. Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development, 41 (6). pp. 697-704. http://eprints.utp.edu.my/31042/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The relationship between quartz surface textural defects (derived from weathering and diagenesis), palaeo-depositional environment and reservoir quality were studied using Tertiary outcrop rock samples obtained from the Belait and Lambir formations of the Sarawak Basin, Malaysia. Thin sections were used for mineral identification and to make observations regarding grain size and texture. Morphological characterization of the samples was performed using scanning electron microscopy (SEM) attached with energy-dispersive X-ray spectrometry (EDX) system, to show variations in quartz surface texture. The SEM images of Belait conglomerates reveal euhedral quartz crystals characterized with prominent mechanical weathering defects (such as straight and conchoidal fractures and striations). Conversely, the analysis of the Lambir sandstones identified chemical weathering features (such as chemical etchings, pitting, solution pits and notches). On the basis of petrology, SEM and CT scan images, evaluation results of reservoir quality indicate that the Lambir Formation in this study area is high-energy coast deposit, with apparent tide-dominated features; while Belait Formation is neritic-delta deposit, with obvious wave-dominated features; reservoir quality of the Belait Formation and Lambir Formation are poor, but the porosity of the Belait Formation is relatively higher than that of the Lambir Formation. ©, 2014, Science Press. All right reserved.
format Article
author Ali, A.M.
Padmanabhan, E.
spellingShingle Ali, A.M.
Padmanabhan, E.
Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions
author_sort Ali, A.M.
title Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions
title_short Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions
title_full Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions
title_fullStr Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions
title_full_unstemmed Quartz surface morphology of Tertiary rocks from North East Sarawak, Malaysia: Implications for paleo-depositional environment and reservoir rock quality predictions
title_sort quartz surface morphology of tertiary rocks from north east sarawak, malaysia: implications for paleo-depositional environment and reservoir rock quality predictions
publisher Science Press
publishDate 2014
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84916195727&doi=10.11698%2fPED.2014.06.07&partnerID=40&md5=559b4534ae15fb8388210b9427e9cfd7
http://eprints.utp.edu.my/31042/
_version_ 1741197509814910976
score 11.62408

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