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All Journal Scientific Contributions Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI (LPMGB)
Prof. Dr. Ir. Bambang Widarsono, M.Sc.
Petroleum Engineering
Chemical Engineering, Chemistry & Bioengineering Energy

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A CUSTOMIZED QUASI THREE-PHASE DRAINAGE RELATIVE PERMEABILITY MODEL FOR SOME INDONESIAN WATER-WET SANDSTONES Prof. Dr. Ir. Bambang Widarsono, M.Sc.
Scientific Contributions Oil and Gas Vol 41 No 1 (2018)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.41.1.61

Abstract

Information about drainage effective two-phase – i.e. quasi three-phase – relative permeability characteristics of reservoir rocks is regarded as very important in hydrocarbon reservoir modeling. The data governs various processes in reservoir such as gas cap expansion, solution gas expansion, and immiscible gas drive in enhanced oil recovery (EOR). The processes are mechanisms in reservoir that in the end determines reserves and resevoir production performance. Nevertheless, the required information is often unavailable for various reasons. This study attempts to provide solution through customizing an existing drainage relative permeability model enabling it to work for Indonesian reservoir rocks. The standard and simple Corey et al. relative permeability model is used to model 32 water-wet sandstones taken from 5 oil wells. The sandstones represent three groups of conglomeratic sandstones, micaceous-argillaceous sandstones, and hard sandstones. Special correlations of permeability – irreducible water saturation and permeability ratio – irreducible water saturation have also been established. Model applications on the 32 sandstones have yielded specific pore size distribution index (λ) and wetting phase saturation parameter (Sm) values for the three sandstone groups, and established a practical procedure for generating drainage quasi three-phase relative permeability curves in absence of laboratory direct measurement data. Other findings such as relations between λ and permeability and influence of sample size in the modeling are also made.
Cadangan dan Produksi Gas Bumi Nasional: Sebuah Analisis atas Potensi dan Tantangannya Prof. Dr. Ir. Bambang Widarsono, M.Sc.
Lembaran publikasi minyak dan gas bumi Vol 47 No 3 (2013)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.47.3.244

Abstract

Dekade 2000-an dan 2010-an menunjukkan penurunan secara drastis produksi minyak bumi Indonesia secara nasional. Di sisi lain, pada periode yang sama pula situasi produksi dan cadangan gas bumi nasional justru menunjukkan perkembangan yang menggembirakan. Seiring dengan semakin tingginya harga minyak bumi, hal ini telah mendorong pemerintah untuk mengambil kebijakan substitusi kebutuhan energi dalam negeri dengan memanfaatkan cadangan dan produksi gas bumi. Studi ini dilakukan untuk melihat apakah keadaan cadangan gas bumi nasional saat ini memang dapat mendukung kebijakan tersebut, dan tantangan- tantangan apa yang harus dihadapi. Beberapa kesimpulan utama yang dapat ditarik adalah perlunya untuk didorong komersialisasi dan mobilisasi lapangan-lapangan gas tidak aktif, semakin besarnya kontribusi cadangan-cadangan offshore pada produksi nasional, baiknya tingkat laju pengurasan lapangan-lapangan aktif secara umum, dan perlunya peningkatan usaha bagi mendorong eksplorasi di Kawasan Timur Indonesia. Secara umum cadangan gas bumi nasional dinilai mampu mendukung produksi nasional untuk periode yang cukup panjang, dengan catatan perlunya mengatasi berbagai tantangan alamiah, teknis, dan non-teknis.
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