Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal JOURNAL OF EARTH ENERGY ENGINEERING Petro : Jurnal Ilmiah Teknik Perminyakan Scientific Contributions Oil and Gas
Silvya Dewi Rahmawati
Institut Teknologi Bandung
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Materials Science & Nanotechnology

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
The Implementation of Critical Gas Rate in Liquid Loading Well and Optimization Analysis using the Adequacy Chart Andru Ferdian; Silvya Dewi Rahmawati
Journal of Earth Energy Engineering Vol. 10 No. 3 (2021)
Publisher : Universitas Islam Riau (UIR) Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jeee.2021.6955

Abstract

In the gas well, liquid loading occurs when the gas rate is insufficient to lift liquids into the surface such as water and/or condensate. This causes an accumulation of the liquid in the wellbore, supplies additional backpressure to the formation, and may completely kill the well. Meanwhile, the limited space and typically high cost of offshore operations have made a proper study for optimization selection very essential. The selected project must fulfill several requirements, namely: 1) Fit for the purpose, 2) Low risk and uncertainties, and 3) Economic. Hence, this study will describe the pilot project and continuous improvement process of lowering the gas well pressure using a wellhead compressor and a temporary separator to optimize the liquid loading. It also explains the implementation of critical gas rate in predicting the liquid loading event from the well’s production history. A new analysis method utilizing the adequacy chart was proposed to verify the suitability of the available pressure-lowering system unit available in the market with the well candidates. An adequacy chart was constructed from the well’s deliverability, critical gas rate, and lowering pressure unit or system capacity. These three charts will combine to generate an overlapping area, which signifies suitability for the recommended operation. The well’s production data history can be used to predict the liquid loaded-up event due to the continued decline of the generated gas. Also, a combination of the critical gas rate and decline analyses can predict potential liquid loading problems.
DIAMETER OPTIMIZATION IN MULTIPHASE PIPELINE NETWORK Ristiyan Ragil Putradianto; Silvya Dewi Rahmawati
PETRO: Jurnal Ilmiah Teknik Perminyakan Vol. 9 No. 2 (2020): JUNI
Publisher : Jurusan Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1203.386 KB) | DOI: 10.25105/petro.v9i2.7232

Abstract

Optimization is a continuous work in oil and gas operation in every section by maximizing the profit and minimizing cost. One of the sections that can be optimized is production system, starting from the wellbore to separator through pipeline network. Simulation are made and conducted from reservoir to separator to see the pressure distribution along the pipeline with various diameter. The result will be subject to be optimized by putting pipeline cost into account. The simulation result shows that at some point, increasing in diameter has a good effect to the revenue thanks to the increasing production rate, but it also shows that the increasing diameter in all section is not always the best scenario due to high cost. Benefit-to-cost ratio is chosen to be the economical parameter to find the best diameter configuration.
A Techno-Economic Study on The Impact of Carbon Tax on Production Rate and Production Duration in An Oil Field Adithya Aladar; Silvya Dewi Rahmawati; Ardhi Hakim Lumban Gaol
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.v49i2.2049

Abstract

This study investigates the economic implications of carbon taxation on upstream oil and gas operations by integrating emission quantification with techno-economic evaluation in a mature offshore oil field. Greenhouse gas emissions were calculated from major upstream sources, including fuel combustion, flaring, venting, and fugitive emissions, using activity-based approaches aligned with IPCC methodologies. Emissions were monetized using Norwegian carbon tax rates, reaching approximately USD 87 per ton CO₂ by 2025, and integrated into project cash flow analysis. The quantified carbon costs were incorporated as additional operating expenditures to evaluate their impact on Net Present Value (NPV) and Internal Rate of Return (IRR). The quantified emissions were monetized using the Norwegian carbon tax framework and incorporated into project cash flow analysis as additional operating costs. Government allowance and subsidy mechanisms were also considered to partially offset the carbon burden. Net Present Value (NPV) and Internal Rate of Return (IRR) were evaluated for baseline conditions and nine production optimization scenarios combining production rate reductions of 10%, 20%, and 30% with production duration extensions of one to three years. The baseline case shows a reduction in NPV of approximately 19% after incorporating carbon costs. Fugitive emissions represent more than 60% of cumulative upstream emissions and dominate total carbon expenditures. Scenario analysis indicates that higher production rate reductions progressively reduce economic losses caused by carbon taxation, although at the expense of lower revenue generation. The results demonstrate that operational optimization can partially mitigate carbon tax impacts in mature oil fields but must be complemented by targeted emission mitigation strategies for long-term sustainability.
Co-Authors Adithya Aladar Andru Ferdian Ardhi Hakim Lumban Gaol Ristiyan Ragil Putradianto