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All Journal JOURNAL OF EARTH ENERGY ENGINEERING Indonesian Journal of Energy JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Jurnal Offshore: Oil, Production Facilities, and Renewable Energy Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti Jurnal AKAL: Abdimas dan Kearifan Lokal JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Journal of Earth Energy Science, Engineering, and Technology Jurnal Eksakta Kebumian
Mardiana, Dwi Atty
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Evaluation of Indonesia's Upstream Oil and Gas Fiscal Terms in Comparison to Malaysia's Enhanced Profitability Terms (EPT)Case Study of Block X Exploration Field Halim, Yosep; Rakhmanto, Pri Agung; Mardiana, Dwi Atty; Irawan, Sonny; Lalaina, Ramefivololona Hanitra; Aimé, Rajomalahy Julien; Fifaliana, Razakamampianina Valisoa; Harifenitra, Ravololoarimanana
Journal of Earth Energy Science, Engineering, and Technology Vol. 8 No. 1 (2025): JEESET VOL. 8 NO. 1 2025
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/hsn4wb37

Abstract

Oil and gas sector is one of the main drivers of Indonesia's economy. Thus, it is important to ensure the attractiveness of Indonesia's Production Sharing Contracts (PSC) fiscal terms for investment, especially in comparison with neighboring countries. In 2021, Malaysia introduced the Enhanced Profitability Terms (EPT) PSC, which is considered to provide a better and more reasonable return for oil and gas contractors. The purpose of this study is to analyze and compare the attractiveness of the Cost Recovery and Gross Split fiscal terms in Indonesia with the EPT fiscal terms in Malaysia, based on economic indicators, including their sensitivity. This study uses a quantitative approach by calculating the economic viability of fields (NPV, IRR, POT), their sensitivity, the range of %CT and %GT, and the profitability characteristics of an exploration block field (Block X). From the evaluation and comparison conducted (specific to the assumed case), it was concluded that the Indonesian Gross Split PSC and the Malaysian EPT PSC have improved economic indicators compared to the Indonesian Cost Recovery PSC. Therefore, the Indonesian Gross Split PSC and the Malaysian EPT PSC generally have better economic indicators, including sensitivity to changes in oil prices, operating costs, and production levels, compared to the Indonesian Cost Recovery PSC. To obtain a more complete picture and enrich the evaluation of these fiscal terms, further analysis can be conducted by considering business risks of contractors, simulations with the application of incentives, and other factors that can affect investment decisions.
Estimation of Indonesia's Energy Demand to 2030 and Alternatives Scenario to Reduce Oil Dependence Mardiana, Dwi Atty; Kartoatmodjo, RS. Trijana; Kasmungin, Sugiatmo
Indonesian Journal of Energy Vol. 1 No. 2 (2018): Indonesian Journal of Energy
Publisher : Purnomo Yusgiantoro Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33116/ije.v1i2.24

Abstract

The impacts of high dependence on oil on the economy have encouraged many countries to start eliminating or sharply reducing their dependence on oil consumption. As an oil importer as well as oil and gas producer country, Indonesia seeks to do the same thing by eliminating fuel subsidies, shifting to gas, and developing renewable energy. The oil price affects the economic and energy policies and impacts the efforts of reducing oil dependence. Using an econometric model of Indonesia’s energy that is constructed based on its energy balance model, this paper will examine factors that influence the oil demand in Indonesia. It will estimate the country’s energy needs from 2017 to 2030 and simulate various alternative strategies to deal with oil dependencies, such as an increase in the refinery capacity, and a shift from oil to gas in the transportation sector. This paper suggests that shifting from oil to gas in the transportation sector will be able to reduce oil dependency, while the alternative of increasing refinery capacity to 3 million barrel per day will be an opportunity to support greater short-term energy security and economic returns.
EVALUASI FISCAL TERM HULU MIGAS INDONESIA DAN BEBERAPA NEGARA DI KAWASAN ASIA TENGGARA: EVALUATION OF UPSTREAM OIL AND GAS FISCAL TERM IN INDONESIA AND SEVERAL COUNTRIES IN SOUTHEAST ASIA Sariallo, Gabriela Martines; Mardiana, Dwi Atty; Rakhmanto, Pri Agung
Jurnal Eksakta Kebumian Vol. 3 No. 2 (2022): JURNAL EKSAKTA KEBUMIAN (JEK)
Publisher : Fakultas Teknologi Kebumian dan Energi, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jek.v3i2.16083

Abstract

Abstrak Pemberlakuan fiscal term pada industri hulu migas di suatu negara dilaksanakan dengan harapan dapat mempercepat proses pengambilan keputusan dan membuat daya tarik investasi hulu migas lebih menarik bagi investor. Penelitian ini mengevaluasi fiscal term disuatu negara pada suatu wilayah yang digunakan di Indonesia, Malaysia, Thailand, dan Vietnam untuk mengetahui tingkat daya tarik dari fiscal term tersebut. Menggunakan beberapa indikator government take (GT) dan  front loading index (FLI) dan composite score (CS) akan dianalisis peringkat daya tarik fiskal dari lima skema fiskal sehingga investor dapat mempertimbangkan skema fiskal mana yang paling menarik untuk investasinya. Hasil analisis keekonomian berdasarkan indikator keekonomian IRR, NPV, POT, PI dan GT menunjukan bahwa skema fiskal yang paling menarik untuk lapangan baru develop onshore adalah skema fiskal PSC gross split Indonesia, kemudian untuk lapangan mature onshore adalah skema fiskal PSC Vietnam, dan untuk lapangan offshore adalah skema fiskal konsesi Thailand. Sedangkan hasil pemeringkatan daya tarik menunjukan bahwa skema PSC lebih menarik untuk diterapkan pada lapangan onshore dan konsesi pada lapangan offshore.   Kata kunci : fiscal term, front loading index, composite score   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) and 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, PI and GT show that the most attractive fiscal scheme for newly developed onshore fields is the Indonesian gross split PSC fiscal scheme, then for mature onshore fields is the Vietnamese PSC fiscal scheme, and for offshore fields is the Thai concession fiscal scheme. Meanwhile, the results of the attractiveness ranking show that the PSC scheme is more attractive to be applied to onshore fields and concessions to offshore fields.   Keywords: fiscal term, front loading index, composite score
Characterization of Addition Porang on Polyacrylamide Polymer for Enhanced Oil Recovery Siahaya, Jacob; Mardiana, Dwi Atty; Fathaddin, Muhammad Taufiq
Journal of Earth Energy Science, Engineering, and Technology Vol. 6 No. 3 (2023): JEESET VOL. 6 NO. 3 2023
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jeeset.v6i3.17423

Abstract

The main purpose of polymer injection is to reduce the water-oil mobility ratio. By increasing the viscosity of the injection fluid, polymer injection can increase sweep efficiency, thereby increasing oil recovery. This study aims to determine the viscosity and adsorption effects of adding porang to polyacrylamide polymers. The method used in this research is a laboratory experiment. The salinity of the formation water used in this study was 6000 ppm, 12000 ppm, and 18000 ppm, with variations in polymer concentrations of 2000 ppm, 4000 ppm, and 6000 ppm on the polymer without a mixture of porang and with a mixture of porang. The result of measuring the viscosity of polyacrylamide by adding porang at the salinity of 6000 ppm and polymer concentration of 6000 ppm was 21.82 cp. With the addition of porang to the polyacrylamide polymer at 2000 ppm concentration and 18000 ppm salinity, the adsorption value of the polymer decreased from 2.708 mg/gr to 1.748 mg/gr for 40 mesh sand and from 3.333 mg/g to 2.358 mg/g for 60 mesh sand.  
PEMANFAATAN LIMBAH ORGANIK MENJADI ECO-ENZYME SEBAGAI PRODUK SERBAGUNA UNTUK MENJAGA KELESTARIAN LINGKUNGAN PONDOK PESANTREN Mardiana, Dwi Atty; Riswati, Shabrina Sri; Sagarmatha, Erly Amai
Jurnal Abdi Masyarakat Indonesia (JAMIN) Vol 5 No 2 (2023): JURNAL ABDI MASYARAKAT INDONESIA (JAMIN)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/jamin.v5i2.16970

Abstract

Pengolahan limbah organik menjadi salah satu permasalahan yang ditemukan di lingkungan sebuah Pondok Pesantren di Ciampea, Kabupaten Bogor. Pemilahan jenis limbah juga belum dilakukan, sehingga dibutuhkan edukasi pengolahan dan pelatihan pemanfaatan limbah organik. Kegiatan dimulai dari observasi lapangan untuk mengetahui kebutuhan dan permasalahan mitra, dilanjutkan dengan penyuluhan terkait penggunaan produk rumah tangga yang kerap kali menggunakan bahan kimia dan bahayanya bagi kesehatan dan lingkungan, penyuluhan terkait eco-enzyme sebagai upaya pengolahan limbah organik yang bermanfaat, dan pelatihan pembuatan eco-enzyme sebagai produk serbaguna dari limbah organik yang ramah lingkungan. Bahan dasar utama eco-enzyme berasal dari kulit buah yang rutin dikonsumsi, dengan tambahan gula jawa dan air. Baik santri maupun pengurus pondok pesantren sangat antusias dalam mengikuti kegiatan pengabdian kepada masyarakat ini. Para peserta pelatihan berkomitmen untuk melanjutkan proses produksi eco-enzyme dan memanfaatkan eco-enzyme dalam kegiatan sehari-hari sebagai bentuk kepedulian terhadap lingkungan serta penghematan biaya belanja rumah tangga pondok pesantren. Di samping itu, mitra juga masih membutuhkan pelatihan lanjutan seperti pemurnian air untuk kebutuhan sehari-hari.
Modeling and Prediction of Kappaphycus alvarezii Viscosity Using Artificial Neural Network and Adaptive Neuro-Fuzzy Inference System Fathaddin, Muhammad Taufiq; Ridaliani, Onnie; Rakhmanto, Pri Agung; Mardiana, Dwi Atty; Septianingrum, Wydhea Ayu; Irawan, Sonny; Abdillah, Ridho
Journal of Earth Energy Science, Engineering, and Technology Vol. 8 No. 3 (2025): JEESET VOL. 8 NO. 3 2025
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/fh90e382

Abstract

This study examines the viscosity behavior of Kappaphycus alvarezii polymer solutions enhanced with TiO2 nanoparticles under varying concentrations, salinity, and temperature. Predictive models were developed using Artificial Neural Network (ANN) and Adaptive Neuro-Fuzzy Inference System (ANFIS) approaches. The experimental work involved preparing Kappaphycus alvarezii solutions with polymer concentrations ranging from 2,000 to 6,000 ppm and TiO2 nanoparticle concentrations from 2,000 to 4,000 ppm at salinities of 6,000–30,000 ppm and temperatures between 30 °C and 80 °C. Results showed that increasing Kappaphycus alvarezii concentration enhanced viscosity by 1.04–21.12%, while TiO2 nanoparticles improved viscosity stability, especially under high-salinity conditions. In contrast, higher salinity and temperature reduced viscosity due to ionic screening and increased molecular motion, although a slight rise was observed at 30,000 ppm salinity. The optimized ANN model (18 neurons, one hidden layer) achieved a superior correlation coefficient (r = 0.9980) compared to ANFIS (r = 0.8769), confirming higher predictive accuracy. These findings demonstrate the potential of Kappaphycus alvarezii–TiO2 nanofluids as sustainable viscosity modifiers for enhanced oil recovery (EOR) and verify the reliability of ANN and ANFIS models in predicting viscosity under complex multivariable interactions.
Co-Authors Abdillah, Ridho Aimé, Rajomalahy Julien Arkaan, Muhammad Dzaki Asri Nugrahanti, Asri Dardjat, Izumi Wicaksono Fathaddin, Muh. Taufiq Fifaliana, Razakamampianina Valisoa Halim, Yosep Harifenitra, Ravololoarimanana Havidh Pramadika Kartoatmodjo, RS. Trijana Kosasih, Andri Lalaina, Ramefivololona Hanitra Maulida, Fajri Muhammad Taufiq Fathaddin, Muhammad Taufiq Onnie Ridaliani, Onnie Permata Sari, Dianie Rachmatika, Danella Rahkmanto, Pri Agung Rakhmanto, Pri Agung Rini Setiati Ristawati, Arinda Riswati, Shabrina Sri Sagarmatha, Erly Amai Samsol Sariallo, Gabriela Martines Septianingrum, Wydhea Ayu Siahaya, Jacob Sonny Irawan Sugiatmo Kasmungin, Sugiatmo Suparwoto, Sugeng Suryo Prakoso, Suryo Sutiadi, Andrian Ulfah, Baiq Maulinda Utama, Yeriandi Valentino, Boy Candra Ziad Ziad