The Comparation of Water Saturation Approaches to Reveal a Low Resistivity Reservoir Potential Case in Gumai Formation, South Sumatra Basin

Pratami, Dhea Adisty; Winardi, Sarju; Surjono, Sugeng Sapto; Atmoko, Widi

doi:10.29017/SCOG.46.2.1563

Akses terbuka Jurnal SINTA 1

The Comparation of Water Saturation Approaches to Reveal a Low Resistivity Reservoir Potential Case in Gumai Formation, South Sumatra Basin

Scientific Contributions Oil and Gas · Vol. 46 No. 2 (2023) · hlm. 53–63

DOI: 10.29017/SCOG.46.2.1563
ISSN: 2541-0520, 2089-3361
Terbit: 2023-08-01
Penerbit: Testing Center for Oil and Gas LEMIGAS
Bahasa: eng
Lisensi: creativecommons.org/licenses/by/4.0

Abstrak

The LRLC reservoir zone has been identified in SN-3 well, at the DAP-1 interval on Gumai Formation. This interval has a low resistivity value from 3-5 ohm.m and the drill stem test (DST) results show oil with gas without water. This study is objected to identify the causes of LRLC reservoir in gumai formation and finding a suitable sw calculation method. Some data such as well logs, reports, cores, and XRD are used to calculate petrophysical parameters such as Vsh, Phie, and Sw, and would be validated by DST data. Water saturation (Sw) calculations from Archie and the CEC method (Waxman Smits, Dual Water, Juhasz) were performed and the results were compared. The results showed that the main cause of the DAP-1 interval LRLC zone was the presence of clay minerals consisting of mixed layers (Illite/smectite). These clay minerals will be associated with high cation exchange capacity (CEC) values, with the value 70 (meq/100g), which can increase conductivity and reduce resistivity values. Based on lumping the more optimistic results of sw calculation from Waxman Smits Sw method (Sw based on CEC method). The DST data on the SN-3 well does not have water test data, so the calculation of the Sw value that is close to the Swirr value is considered the most suitable Sw for the low resistivity reservoir conditions of the Gumai Formation in the study area. The best practice for low resistivity reservoir for suitable petrophysical calculation is necessary to pay attention to the rock lithology conditions, the presence of mineral clay, and determining suitable Sw appropriate to the reservoir conditions

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Universitas Gadjah Mada
Tanri Abeng University
National University of Malaysia
Mulawarman University
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Tampilkan sebagai tabel

Rekan penulis	Organisasi	Artikel bersama
Didit Hadi Barianto	Universitas Gadjah Mada	3
Wiwit Suryanto	Universitas Gadjah Mada	3
Donatus Hendra Amijaya	Universitas Gadjah Mada	3
Igor Ian Wiguna	Afiliasi tidak diketahui	1
Gde Ngurah Irfan Bhaskara	Afiliasi tidak diketahui	1
Mutiara Reka Ananda Putri	Afiliasi tidak diketahui	1
Priscilla Ardianto	Afiliasi tidak diketahui	1
Rahmadi Hidayat	Universitas Gadjah Mada	1
Che Aziz Ali	National University of Malaysia	1
Saptono Budi Samodra	Universitas Gadjah Mada	1
Diana Rahmawati	Mulawarman University	1
Wartono Rahardjo	Afiliasi tidak diketahui	1
Salahuddin Husein	Universitas Gadjah Mada	1
Moch. Indra Novian	Afiliasi tidak diketahui	1
Rian Cahya Rohmana	Tanri Abeng University	1
Fiqya Fairuz Zaemi	Tanri Abeng University	1

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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">The Comparation of Water Saturation Approaches to Reveal a Low Resistivity Reservoir Potential Case in Gumai Formation, South Sumatra Basin</dc:title>
	<dc:creator xml:lang="en">Pratami, Dhea Adisty</dc:creator>
	<dc:creator xml:lang="en">Winardi, Sarju</dc:creator>
	<dc:creator xml:lang="en">Surjono, Sugeng Sapto</dc:creator>
	<dc:creator xml:lang="en">Atmoko, Widi</dc:creator>
	<dc:subject xml:lang="en">petrophysics</dc:subject>
	<dc:subject xml:lang="en">LRLC</dc:subject>
	<dc:subject xml:lang="en">CEC</dc:subject>
	<dc:subject xml:lang="en">and gumai formation</dc:subject>
	<dc:description xml:lang="en">The LRLC reservoir zone has been identified in SN-3 well, at the DAP-1 interval on Gumai Formation. This interval has a low resistivity value from 3-5 ohm.m and the drill stem test (DST) results show oil with gas without water. This study is objected to identify the causes of LRLC reservoir in gumai formation and finding a suitable sw calculation method. Some data such as well logs, reports, cores, and XRD are used to calculate petrophysical parameters such as Vsh, Phie, and Sw, and would be validated by DST data. Water saturation (Sw) calculations from Archie and the CEC method (Waxman Smits, Dual Water, Juhasz) were performed and the results were compared. The results showed that the main cause of the DAP-1 interval LRLC zone was the presence of clay minerals consisting of mixed layers (Illite/smectite). These clay minerals will be associated with high cation exchange capacity (CEC) values, with the value 70 (meq/100g), which can increase conductivity and reduce resistivity values. Based on lumping the more optimistic results of sw calculation from Waxman Smits Sw method (Sw based on CEC method). The DST data on the SN-3 well does not have water test data, so the calculation of the Sw value that is close to the Swirr value is considered the most suitable Sw for the low resistivity reservoir conditions of the Gumai Formation in the study area. The best practice for low resistivity reservoir for suitable petrophysical calculation is necessary to pay attention to the rock lithology conditions, the presence of mineral clay, and determining suitable Sw appropriate to the reservoir conditions</dc:description>
	<dc:publisher xml:lang="en">Testing Center for Oil and Gas LEMIGAS</dc:publisher>
	<dc:date>2023-08-01</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/1563</dc:identifier>
	<dc:identifier>10.29017/SCOG.46.2.1563</dc:identifier>
	<dc:source xml:lang="en">Scientific Contributions Oil and Gas; Vol. 46 No. 2 (2023); 53-63</dc:source>
	<dc:source xml:lang="id">Scientific Contributions Oil and Gas; Vol 46 No 2 (2023); 53-63</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/1563/pdf</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2023 © Copyright by Authors. Published by LEMIGAS</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by/4.0</dc:rights>
</oai_dc:dc>