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Ordas Dewanto
Jurusan T. Geofisika Fakultas Teknik Universitas Lampung
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Identification of Potential Unconventional Oil and Gas Zones Based on Permeability, Mobility, and Transmissibility in The North-East Java Basin Bagus Sapto Mulyatno; Ordas Dewanto; Isti Nur Kumalasari; Andri Kurniawan; Asep Irawan; Andy Setyo Wibowo
Scientific Contributions Oil and Gas Vol 49 No 2 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i2.2081

Abstract

The North East Java Basin is one of the prospective unconventional hydrocarbon regions characterized by low-permeability carbonate reservoirs. However, quantitative evaluation of fluid flow behavior and the relationships among petrophysical parameters within tight carbonate systems in this basin remains limited. This study aims to identify unconventional hydrocarbon prospect zones and determine the dominant fluid type based on permeability, mobility, and transmissibility parameters in the BGS-2, BGS-4, and BGS-7 wells. The study integrates well-log data, Total Organic Carbon (TOC) estimation, and interparameter relationship analysis using permeability–mobility and permeability–transmissibility crossplots. The results show that TOC values range from 0.51 to 2.78 wt%, indicating moderate to very good organic richness. The main prospective zones occur at depths of 3235–6469.5 ft (BGS-2), 3617–10632 ft (BGS-4), and 1897–1988 ft (BGS-7). These intervals are characterized by very low permeability (<0.1 mD), low mobility (<10 mD/cP), and limited transmissibility (<100 mD·ft/cP), indicating tight carbonate reservoir characteristics. Crossplot analysis reveals a stronger positive relationship between permeability and mobility than between permeability and transmissibility. The integration of petrophysical parameters indicates that gas is the dominant fluid within the prospective intervals, suggesting that carbonate reservoirs in the North East Java Basin represent promising tight-gas unconventional hydrocarbon resources.
Co-Authors A Raka Abriyansyah A Yuliantina Ade Yogi Akhmad Dzakwan Akhmad Dzakwan Aldis Ramadhan Alghifarry, Muhammad Budzar Andika Widyasari Andri Kurniawan Andy Setyo Wibowo Andy Setyo Wibowo Aryka Claudia Eka Putri Asep Irawan Astri Niken Saputri Ayu Yuliani Bagus Sapto Mulyatno Bambang Irawan Bambang Irawan Bambang Soegijono Beny Chasandra Damayanti, Elok Dani, Ilham Darsono Darsono Darsono Darsono Egi Ramdhani Egi Ramdhani Erfani, Sandi Febrina Bunga Tarigan Hayu Nurfaidah Hesti Hesti Hidayatika, Akroma I Gede Boy Darmawan I Gede Boy Darmawan Ignatius Sonny Winardhie Ilham Dani Ilham Dani Imam Setiadi Isti Nur Kumalasari Isti Nur Kumalasari Istifani Ferucha Istifani Ferucha Karyanto Karyanto, Karyanto Kumalasari, Isti Nur Muh Sarkowi Muhammad Sarkowi Muhammad Sarkowi Mulyatno, Bagus S Nanang Yulianto Nanda Hanyfa Maulida Nanda Paquita Syaharani Nandi Haerudin Nasir Muhammad Ni Putu Juniari Paulus Leonardo Manurung Rafi Maulana Rafi Rilo Pambudi Rahmi Mulyasari RahmiMulyasari, Rahmi Restu Ningsih Rita Aprilia Riza Rahardiawan Ryan Donovan Salsabila Noviari Sri Rizky Suci Ariska Suharso Suharso Suharso Suharso Suharso Suharso Syamsurijal Rasimeng Varenza Novita Yandi Wibisono, Ambrosius Hernawan Wibowo, Rahmat Catur WP Prihadita Yandi, Varenza Novita