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All Journal JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Petro : Jurnal Ilmiah Teknik Perminyakan Journal of Earth Energy Science, Engineering, and Technology
Pri Agung Rakhmanto
Universitas Trisakti
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Industrial & Manufacturing Engineering Transportation

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KEEKONOMIAN LISTRIK PANAS BUMI Pri Agung Rakhmanto
PETRO:Jurnal Ilmiah Teknik Perminyakan Vol. 5 No. 2 (2016): Agustus
Publisher : Jurusan Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.718 KB) | DOI: 10.25105/petro.v5i2.2511

Abstract

Panas bumi merupakan sumber energi terbarukan yang sangat potensial untuk dikembangkan di Indonesia. Potensi energi panas bumi Indonesia tercatat 28.579 MW, namun baru termanfaatkan untuk pembangkit listrik sekitar 1.712,5 MW. Salah satu kendala terbesar di dalam pengembangan panas bumi untuk pembangkit listrik adalah tingkat keekonomian tarif listrik panas bumi. Tarif keekonomian yang ditetapkan pemerintah tidak selalu dapat menjamin keekonomian proyek listrik panas bumi yang ada. Paper ini mencoba melihat keekonomian tarif listrik panas bumi yang terbaru ditetapkan pemerintah. Simulasi perhitungan dilakukan untuk menghitung keekonomian proyek listrik panas bumi di suatu wilayah. Indikator keekonomian yang digunakan adalah Net Present Value (NPV), Internal Rate of Return (IRR), dan Pay Out Time (POT). Dari simulasi perhitungan yang dilakukan, ditemukan bahwa untuk dapat mencapai tingkat keekonomian yang layak perlu ada penyesuaian tarif listrik panas bumi yang ada.
Post Treatment Acidizing Study on Carbonate Rock with Wormhole Radius Method Ageng Warasta; Ratnayu Sitaresmi; Pri Agung Rakhmanto; Esaim Mustafa Abrahim Omar
Journal of Earth Energy Science, Engineering, and Technology Vol. 4 No. 1 (2021): JEESET VOL. 4 NO. 1 2021
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.045 KB) | DOI: 10.25105/jeeset.v4i1.9059

Abstract

The problem that generally occurs in production activities is that wells in producing conditions has a low production rate. This could be due to the low permeability value of the reservoir or the increase of the skin factor of the reservoir due to formation damage. This matrix acidizing stimulation method is considered as an effective method in terms of activity costs and the success ratio in carbonate rocks. One of the successes of increasing the permeability around the well area depends on how far the wormholes are formed around the well. The results showed that the fractal dimension and wormhole radius model approach can be used to analyze the post treatment skin effect after validating the field data. Further analysis was carried out by involving limestone and dolomite reservoirs which have different characteristics in terms of porosity, permeability and fractal dimensions. The two reservoirs require different volumes of acid injection to produce the same reduction in skin factor. In this research, it is found that the parameters of permeability ratio, fractal dimensions, acid concentration, rock porosity and type of lithology affect the post treatment skin factor.
Effect of Sand Grain Size on Spontaneous Imbibition of Surfactant Solution Pri Agung Rakhmanto; Listiana Satiawati; Rini Setiati; Asri Nugrahanti; Sonny Irawan
Journal of Earth Energy Science, Engineering, and Technology Vol. 4 No. 2 (2021): JEESET VOL. 4 NO. 2 2021
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (534.91 KB) | DOI: 10.25105/jeeset.v4i2.9419

Abstract

In spontaneous imbibition researches, surfactant has been employed to control interfacial tension (IFT) and wettability. In this paper, the evaluation of grain size effect on spontaneous imbibition of surfactant solution is presented. In this work, the synthetic porous media (sand packs) with uniform and non-uniform grain size from 30 mesh to 100 mesh were made. The porous media were initially saturated by oil. Then they were immersed in brine with salinity of 62 to 40,000 ppm for 24 hours. After that, the porous media were immersed in surfactant solution with concentration of 0.2% for another 24 hours. The total oil recovery during these treatments was measured. The experiment was separated into three parts in order to investigate the effect of uniform grains, non-uniform grains, and salinity in spontaneous imbibition. The results show that grain size and porosity were proportional to oil recovery. In the case of porous media with uniform grain size, the effect of grain size on recovery factor is stronger than that of porosity. Meanwhile the salinity has an the optimum condition for a maximum recovery factor. In this study, it happened at salinity of 20,000 ppm. Oil recovery factors observed in this study ranged from 66.7% to 91.1%.
Pengembangan Penelitian Biodiesel Menggunakan Analisis Bibliometrik Muhammad Taufiq Fathaddin; Aqlyna Fattahanisa; Shabrina Sri Riswati; Rini Setiati; Pri Agung Rakhmanto
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 7, No 1 (2023): Vol 7 No. 1 Tahun 2023
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v7i1.984

Abstract

Masalah sektor energi di Indonesia saat ini adalah penurunan cadangan dan produksi minyak bumi serta kenaikan kebutuhan minyak yang berkelanjutan. Ketertarikan penggunaan biodiesel yang diperoleh dari sumber energi terbarukan terus meningkat. Dalam satu dekade terakhir, jumlah publikasi mengenai tema ini menunjukkan peningkatan. Penelitian ini bertujuan untuk mengamati perkembangan penelitian mengenai pemanfaatan bahan baku nabati menjadi bahan bakar biodiesel. Analisis bibliometrik terhadap berbagai publikasi mengenai biodiesel dilakukan untuk mendapatkan informasi mengenai arah pengembangan dan kebaruan penelitian mengenai tema tersebut. Sejumlah 679 literatur yang relevan berdasarkan data publikasi antara 2012 hingga 2022 dari koleksi Google Scholar telah dianalisis. Kata kunci yang digunakan dalam penelusuran adalah “biodiesel”, “rapeseed”, “corn”, “cottonseed”, “sunflower”, “soybean”, “sesame” and “coconut”. Harzing’s Publish or Perish dan VOSviewer digunakan sebagai perangkat untuk melakukan pengumpulan dan analisis terhadap publikasi dengan kata-kata kunci tersebut. Hasil penelitian menunjukkan bahwa dari 679 publikasi terkait biodiesel, diperoleh kata-kata dengan frekuensi kemunculan tertinggi yaitu “Masjuki”, “Sunflower Oil”, dan “USA” berturut-turut sebagai penulis, tema, dan negara yang paling banyak tertulis dalam artikel. Berdasarkan tahun publikasi terlihat bahwa pembahasan mengenai pengamatan sifat bahan bakar dan minyak nabati yang dapat dimakan menjadi isu yang relatif lebih baru. Di samping itu, jumlah paper yang membahas biodiesel cenderung semakin bertambah.
A A Comparison of Economics and Attractiveness of Fiscal System in Several Southeast Asian Countries : A Case Study of Three Oil And Gas Field in Indonesia Gabriela Martines Martines; Dwi Atty Mardiana; Pri Agung Rakhmanto
Journal of Earth Energy Science, Engineering, and Technology Vol. 6 No. 2 (2023): JEESET VOL. 6 NO. 2 2023
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jeeset.v6i2.17397

Abstract

The implementation of fiscal terms in the upstream oil and gas industry in a country is carried out with the hope of accelerating the decision-making process and making the attractiveness of upstream oil and gas investment more attractive to investors. This study evaluates fiscal terms in a country in a region used in Indonesia, Malaysia, Thailand, and Vietnam to determine the attractiveness of the fiscal terms. Using several indicators of government take (GT), front loading index (FLI), and composite score (CS), the fiscal attractiveness ranking of five fiscal schemes will be analyzed so that investors can consider which fiscal scheme is most attractive for their investment. The results of the economic analysis based on the economic indicators of IRR, NPV, POT, and PI show that the newly developed onshore, existing onshore, and offshore gas fields are included in the investment feasibility criteria with attractive economic values when applied with all fiscal schemes. While the ranking results with GT, FLI, and CS indicators show that Indonesia's gross split PSC has an attractive attractiveness when applied to newly developed onshore fields, R/C PSC on existing onshore fields, and Thailand’s concessions on offshore gas fields.
Co-Authors Ageng Warasta Aqlyna Fattahanisa Asri Nugrahanti Dwi Atty Mardiana Esaim Mustafa Abrahim Omar Gabriela Martines Martines Listiana Satiawati Muhammad Taufiq Fathaddin, Muhammad Taufiq Ratnayu Sitaresmi Rini Setiati Shabrina Sri Riswati Sonny Irawan