eprintid: 10233
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/02/33
datestamp: 2023-11-09 16:36:51
lastmod: 2023-11-09 16:36:51
status_changed: 2023-11-09 16:30:54
type: article
metadata_visibility: show
creators_name: Sabri, A.A.M.
creators_name: Siddiqui, N.A.
title: Variance in reservoir quality due to diagenesis: A study from tidal deposits, Nyalau formation, Sarawak, east Malaysia
ispublished: pub
note: cited By 0
abstract: Prediction of reservoir quality is challenging due to complexities caused by pore geometry. Here diagenesis plays an important role in providing a better understanding of the controls on reservoir quality. This research focuses on determination of pore geometry and diagenetic alterations in the Nyalau Formation, Borneo. This has been achieved by a combination of traditional, macroscopic field sedimentology and microscopic thin-section study, along with grain size analysis and porosity-permeability determination on 26 samples taken from outcrops. Represented outcrops from the study area show sedimentary features such as herringbone lamination, cross-bedding, flaserbedding, wavybedding and bioturbation structures. The outcrop samples are mainly very fine to fine grained, with petrographic visible porosity ranging from 15 to 35, indicating reservoir quality of the outcrop is good to very good. Permeability of the sandstone facies ranges from 50 to 1000 millidarcies (mD). Petrographic analysis shows the sorting to be very poor to fair depending on facies type, with common quartz overgrowths indicating diagenetic reduction of reservoir quality. Integrating the results of these analyses shows which factors affect the diagenesis of the tidal sandstones in the Nyalau Formation, which is considered as an analogue for a good quality hydrocarbon sandstone reservoir. © 2018 Geological Society of Malaysia. All rights reserved.
date: 2018
publisher: Geological Society of Malaysia
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060313424&doi=10.7186%2fbgsm65201811&partnerID=40&md5=4a392d14505893a481f571fe0a2edd6f
id_number: 10.7186/bgsm65201811
full_text_status: none
publication: Bulletin of the Geological Society of Malaysia
volume: 65
pagerange: 101-106
refereed: TRUE
issn: 01266187
citation:   Sabri, A.A.M. and Siddiqui, N.A.  (2018) Variance in reservoir quality due to diagenesis: A study from tidal deposits, Nyalau formation, Sarawak, east Malaysia.  Bulletin of the Geological Society of Malaysia, 65.  pp. 101-106.  ISSN 01266187