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TO EXPLAIN THE NATURE OF CORE POROSITY USING RESULTS OF PETROGRAPHY ANALYSIS

Scientific Contributions Oil and Gas · Vol. 30 No. 3 (2022) · hlm. 48–56

DOI
10.29017/SCOG.30.3.979
ISSN
2541-0520, 2089-3361
Terbit
2022-03-29
Penerbit
Testing Center for Oil and Gas LEMIGAS
Bahasa
eng
Lisensi
creativecommons.org/licenses/by/4.0

Abstrak

The Permian to Triassic Tirrawarra Sandstone succession in the Cooper Basin of CentralAustralia is characterized by its low permeability. Ambient core porosity averages8.96% and ambient permeability 0.9 mD. Most samples studied have permeabilities lessthan 3mD. Despite its overall poor reservoir characteristics, the Tirrawarra Sandstone isone of the major oil and gas targets in Australia. A total of 17 core plugs from 6 wellswere studied petrographically using optical petrography, SEM and XRD. These resultswere integrated with core analysis data.Petrographic study revealed the diagenetic events, mainly mechanical and chemicalcompaction, cementation and alteration have modified the reservoir quality. Ductile componentssuch as rock fragments, clay and matrix influence mechanical compaction, whichare the main cause of reservoir quality reduction. Quartz cementation and clay distributionalso affected the porosity, but particularly permeability. Mechanical compaction aswell as quartz cementation have reduced and blocked pore-throats to isolate intergranularpores. The alteration of feldspar to kaolin has changed intergranular porosity tomicroporosity. Illite occurs as either cement, alteration of rock fragments or kaolinite. Allof these diagenetic events also affect fluid movement in the reservoir.This paper presents the evaluation of the determination of effectiveness of porosity inthe delivery of gas from sandstone reservoir in the Cooper Basin using integrated petrographyanalysis and core measurements.

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  • Bandung Institute of Technology
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Bambang WidarsonoNational Research and Innovation Agency7
Zulkifliani ZulkiflianiAfiliasi tidak diketahui1
Hadi PrasetyoAfiliasi tidak diketahui1
Himawan SutantoAfiliasi tidak diketahui1
Humbang PurbaAfiliasi tidak diketahui1
Andi RuswandiAfiliasi tidak diketahui1
Septi AnggraeniAfiliasi tidak diketahui1
Djoko SantosoBandung Institute of Technology1
Rachmat SuleBandung Institute of Technology1
Wawan Gunawan A. KadirBandung Institute of Technology1
Asep Kurnia PermadiBandung Institute of Technology1
Oki HedrianaBandung Institute of Technology1
Dewi MersitariniPertamina (Indonesia)1
Dimas ArdiyantaPertamina (Indonesia)1
Sofyan SumarnaUniversitas Pertamina1
Panca W. SukarnoAfiliasi tidak diketahui1
Tri Muji SusantoroNational Research and Innovation Agency1
Suliantara SuliantaraNational Research and Innovation Agency1
Devitra Saka RaniNational Research and Innovation Agency1
Herru Lastiadi SetiawanNational Research and Innovation Agency1
Usman PasaraiNational Research and Innovation Agency1
Mohamad RomliNational Research and Innovation Agency1
Diana DwiyanartiNational Research and Innovation Agency1
Aziz Masykur LubadAfiliasi tidak diketahui1
Herizal HerizalNational Research and Innovation Agency1
Nurkamelia NurkameliaNational Research and Innovation Agency1
Sunting KepiesNational Research and Innovation Agency1
Sugihardjo SugihardjoNational Research and Innovation Agency1
Rudi Suhartono WijayakoNational Research and Innovation Agency1
Muhamad BudisatyaAfiliasi tidak diketahui1
Yohanes D. Wangge YohanesAfiliasi tidak diketahui1

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Sumber metadata: OAI-PMH (metadata jurnal) https://journal.lemigas.esdm.go.id/index.php/SCOG/oai, pertama di-harvest 10 Nov 2026, terakhir terlihat 10 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en">TO EXPLAIN THE NATURE OF CORE POROSITY USING RESULTS OF PETROGRAPHY ANALYSIS</dc:title>
	<dc:creator xml:lang="en">Musu, Junita Trivianty</dc:creator>
	<dc:subject xml:lang="en">core porosity</dc:subject>
	<dc:subject xml:lang="en">core permeability</dc:subject>
	<dc:subject xml:lang="en">petrography analysis</dc:subject>
	<dc:subject xml:lang="en">diagenesis</dc:subject>
	<dc:description xml:lang="en">The Permian to Triassic Tirrawarra Sandstone succession in the Cooper Basin of CentralAustralia is characterized by its low permeability. Ambient core porosity averages8.96% and ambient permeability 0.9 mD. Most samples studied have permeabilities lessthan 3mD. Despite its overall poor reservoir characteristics, the Tirrawarra Sandstone isone of the major oil and gas targets in Australia. A total of 17 core plugs from 6 wellswere studied petrographically using optical petrography, SEM and XRD. These resultswere integrated with core analysis data.Petrographic study revealed the diagenetic events, mainly mechanical and chemicalcompaction, cementation and alteration have modified the reservoir quality. Ductile componentssuch as rock fragments, clay and matrix influence mechanical compaction, whichare the main cause of reservoir quality reduction. Quartz cementation and clay distributionalso affected the porosity, but particularly permeability. Mechanical compaction aswell as quartz cementation have reduced and blocked pore-throats to isolate intergranularpores. The alteration of feldspar to kaolin has changed intergranular porosity tomicroporosity. Illite occurs as either cement, alteration of rock fragments or kaolinite. Allof these diagenetic events also affect fluid movement in the reservoir.This paper presents the evaluation of the determination of effectiveness of porosity inthe delivery of gas from sandstone reservoir in the Cooper Basin using integrated petrographyanalysis and core measurements.</dc:description>
	<dc:publisher xml:lang="en">Testing Center for Oil and Gas LEMIGAS</dc:publisher>
	<dc:date>2022-03-29</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.lemigas.esdm.go.id/index.php/SCOG/article/view/979</dc:identifier>
	<dc:identifier>10.29017/SCOG.30.3.979</dc:identifier>
	<dc:source xml:lang="en">Scientific Contributions Oil and Gas; Vol. 30 No. 3 (2007); 48-56</dc:source>
	<dc:source xml:lang="id">Scientific Contributions Oil and Gas; Vol 30 No 3 (2007); 48-56</dc:source>
	<dc:source>2541-0520</dc:source>
	<dc:source>2089-3361</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journal.lemigas.esdm.go.id/index.php/SCOG/article/view/979/771</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 1970 SCIENTIFIC CONTRIBUTIONS OIL AND GAS (SCOG)</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by/4.0</dc:rights>
</oai_dc:dc>