Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo

Reservoir studies in the Sandakan sub-basin NW Borneo are challenging and inexplicable due to complex diagenetic effects such as compaction, cementation, dissolution and depositional means including grain size, sorting and packing with reference to clay texture. These diagenetic effects together imp...

Full description

Main Authors: Usman, M., Siddiqui, N.A., Mathew, M., Zhang, S., El-Ghali, M.A.K., Ramkumar, M., Jamil, M., Zhang, Y.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.29916 /
Published: Elsevier Ltd 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087478668&doi=10.1016%2fj.marpetgeo.2020.104509&partnerID=40&md5=0de848efcdbdf7fbb7b8e6a12738f032
http://eprints.utp.edu.my/29916/
Tags: Add Tag
No Tags, Be the first to tag this record!
id utp-eprints.29916
recordtype eprints
spelling utp-eprints.299162022-03-25T03:14:30Z Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo Usman, M. Siddiqui, N.A. Mathew, M. Zhang, S. El-Ghali, M.A.K. Ramkumar, M. Jamil, M. Zhang, Y. Reservoir studies in the Sandakan sub-basin NW Borneo are challenging and inexplicable due to complex diagenetic effects such as compaction, cementation, dissolution and depositional means including grain size, sorting and packing with reference to clay texture. These diagenetic effects together impart significant amounts of uncertainty on reservoir quality assessment. In this regard, we documented the mineralogical, diagenetic and reservoir properties of sandstones from the Sandakan Formation, NW Borneo through thin sections, SEM, XRD, XRF, He-porosimeter and poroperm. In order to analyze the influential parameters, we used matrix, grain rearrangement and clay coating around detrital grains for the reservoir quality. Our results show that the sub-litharenites to quartz arenite that dominate in the sandstones are drawn from recycled orogenic sand. Furthermore, reservoir properties of the sandstones were ascertained to be controlled by diagenesis, micro quartz with clay coatings and pressure dissolution of feldspar with the alteration of lithic fragments. The result shows that the physical compaction, rearrangements and ductility of grains were the reasons that reduced porosity and permeability. The main reason for porosity reduction in the present study is pressure dissolution that resulted in the form of chemical compaction induced by micas with grain contacts. Nonetheless, through SEM and petrography, clay coatings around the grains and dissolution of feldspar were found to optimally contribute to the preservation of reservoir properties. Dissolution of feldspar and kaolinization resulted in the formation of secondary porosity that allows meteoric water to percolate through the open and detachment spaces of quartz or other grains. This percolation is also responsible in enhancing the pore throat radii in the reservoir media of the analyzed sandstones. These traits are obliging to diagenetic effects on porosity and permeability, which are linked with the physical compaction and clays coating to reduce and preserve the reservoir properties respectively of same type of reservoirs globally. © 2020 Elsevier Ltd Elsevier Ltd 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087478668&doi=10.1016%2fj.marpetgeo.2020.104509&partnerID=40&md5=0de848efcdbdf7fbb7b8e6a12738f032 Usman, M. and Siddiqui, N.A. and Mathew, M. and Zhang, S. and El-Ghali, M.A.K. and Ramkumar, M. and Jamil, M. and Zhang, Y. (2020) Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo. Marine and Petroleum Geology, 120 . http://eprints.utp.edu.my/29916/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Reservoir studies in the Sandakan sub-basin NW Borneo are challenging and inexplicable due to complex diagenetic effects such as compaction, cementation, dissolution and depositional means including grain size, sorting and packing with reference to clay texture. These diagenetic effects together impart significant amounts of uncertainty on reservoir quality assessment. In this regard, we documented the mineralogical, diagenetic and reservoir properties of sandstones from the Sandakan Formation, NW Borneo through thin sections, SEM, XRD, XRF, He-porosimeter and poroperm. In order to analyze the influential parameters, we used matrix, grain rearrangement and clay coating around detrital grains for the reservoir quality. Our results show that the sub-litharenites to quartz arenite that dominate in the sandstones are drawn from recycled orogenic sand. Furthermore, reservoir properties of the sandstones were ascertained to be controlled by diagenesis, micro quartz with clay coatings and pressure dissolution of feldspar with the alteration of lithic fragments. The result shows that the physical compaction, rearrangements and ductility of grains were the reasons that reduced porosity and permeability. The main reason for porosity reduction in the present study is pressure dissolution that resulted in the form of chemical compaction induced by micas with grain contacts. Nonetheless, through SEM and petrography, clay coatings around the grains and dissolution of feldspar were found to optimally contribute to the preservation of reservoir properties. Dissolution of feldspar and kaolinization resulted in the formation of secondary porosity that allows meteoric water to percolate through the open and detachment spaces of quartz or other grains. This percolation is also responsible in enhancing the pore throat radii in the reservoir media of the analyzed sandstones. These traits are obliging to diagenetic effects on porosity and permeability, which are linked with the physical compaction and clays coating to reduce and preserve the reservoir properties respectively of same type of reservoirs globally. © 2020 Elsevier Ltd
format Article
author Usman, M.
Siddiqui, N.A.
Mathew, M.
Zhang, S.
El-Ghali, M.A.K.
Ramkumar, M.
Jamil, M.
Zhang, Y.
spellingShingle Usman, M.
Siddiqui, N.A.
Mathew, M.
Zhang, S.
El-Ghali, M.A.K.
Ramkumar, M.
Jamil, M.
Zhang, Y.
Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo
author_sort Usman, M.
title Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo
title_short Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo
title_full Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo
title_fullStr Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo
title_full_unstemmed Linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from NW Borneo
title_sort linking the influence of diagenetic properties and clay texture on reservoir quality in sandstones from nw borneo
publisher Elsevier Ltd
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087478668&doi=10.1016%2fj.marpetgeo.2020.104509&partnerID=40&md5=0de848efcdbdf7fbb7b8e6a12738f032
http://eprints.utp.edu.my/29916/
_version_ 1741197320044675072
score 11.62408

Similar Items