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All Journal JFA (Jurnal Fisika dan Aplikasinya) Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Jurnal Migasian Akamigas Balongan Indramayu Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti Jurnal AKAL: Abdimas dan Kearifan Lokal Petro : Jurnal Ilmiah Teknik Perminyakan Journal of Earth Energy Science, Engineering, and Technology Jurnal Eksakta Kebumian Jurnal Migasian Scientific Contributions Oil and Gas
Mardiana, Dwi Atty
Universitas Trisakti
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Journal : Journal of Earth Energy Science, Engineering, and Technology

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Geometry Modified Square Edge Orifice Valve Study for Efficiency Gas Lift with Computational Fluid Dynamic (CFD) Method Adam Fatchur Rohman; Sugiatmo Kasmungin; Dwi Atty Mardiana
Journal of Earth Energy Science, Engineering, and Technology Vol. 2 No. 1 (2019): JEESET VOL. 2 NO. 1 2019
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (574.385 KB) | DOI: 10.25105/jeeset.v2i1.4651

Abstract

The gas lift lifting system is widely used as an artificial lift on the X Field, with an average depth of gas lift production wells of 3,000-3,500 ft. Design of 3 to 5 Gas lift Valves (GLV) designwith size of 1 inch is ussualy applied. While at the point of gas injection, the GLV square edge orifice is applied. The problem in the optimization of gas lift wells is the flow instability due to gas flow rate fluctuations, the limited volumetric gas injection and limited gas compressor pressure. With the limited compressor pressure, the lift flow and gas design speed is very dependent on the amount of pressure on the compressor, the production wells with limited injection pressure will result in a limited amount of gas injection, the square edge orifice requires a pressure difference of 40% to achieve the maximum gas flow rate. This study aims to find the modification of the GLV orifice geometry to improve the efficiency of the gas lift system so that it can get optimal production. This GLV design modification includes changing the GLV orifice geometry. Design studies using Computational Fluid Dynamic (CFD) simulations aim to analyze any changes in GLV geometry design to the performance of the gas flow rate in the orifice valve described in the valve performance curve. The design modification approach is in accordance with the GLV venturi orifice geometry and the availability of equipment for GLV modification. The CFD simulation results of the first modification geometry by increasing the orifice diameter from 0.25 to 0.5 inch with the condition of upstream 650 psig and downstream 625 psig pressure increasing the injection gas flow rate capacity by 355% and modifying the second geometry with the venturi orifice form by 280%. In modifying the shape of the orifice venture to reach critical flow requires a pressure difference of 10%. Based on simulation results, the modified orifice application is able to increae production up to 44%.
The Effect of Non- Ioic Surfactant in Gravity Drainage Processes in the Reservoir to Increase Oil Production at a Laboratory Scale Nanda Josenia Sainuka; Sugiatmo Kasmungin; Dwi Atty Mardiana
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 (499.623 KB) | DOI: 10.25105/jeeset.v4i1.9061

Abstract

Chemical flooding is one of the methods used to increase oil recovery. One of the chemical flooding used is alkaline surfactant, where the alkaline and surfactant function is to reduce interface stress and form microemulsion . In this study, a screening of surfactant was conducted in order to determine which surfactants were compatible and then injected to increase oil production. The surfactants used in this study were non-ionic surfactants namely Poly Ethylene Glycol Monooleate (PEGM), Nonyl Phenol Ethoxylate (NP-6), Poly Ethylene Glycol Diolate (PD) and Sodium Dodecyl Benzene (SDB) with surfactant concentrations of 0.3 %, NaCL concentrations of 0%, 2% and 5%, and alkaline concentrations (NaOH and Na2CO3) of 0.05%, 0.1% and 0.5%. The result obtained from the measurement of Interfacial Tension (IFT) surfactant PEGM 3% at the brine concentration of 2% was 0.012638 Dyne/cm. After that imbibition testing was performed to perceive the ability of surfactants to bind oil in rock pores, the highest oil recovery was 75.7% in PEGM surfactant concentration of 0.3%, salinity of 2%, and NaOH alkaline of 1.2%.
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 Adam Fatchur Rohman Adi Novriansyah Andri Kosasih Andri Kosasih Asri Nugrahanti Avty Vilanti Changhyup Park Chrismon, Chrismon Fathaddin, Muhammad Taufiq Gabriela Martines Martines Gabriela Martines Sariallo Kartoatmodjo, R.S. Trijana Maulida, Fajri Muh Taufiq Fathaddin Muh Taufiq Fathaddin, Muh Taufiq Muhammad Abizar Algiffary Thahir Muhammad Taufiq Fathaddin, Muhammad Taufiq Mukhlis Noor Alfatih Muslim Abdurrahman Nanda Josenia Sainuka Nugroho, Nurkhozin Adhi Nurkhozin Adhi Nugroho Onnie Ridaliani, Onnie Pauhesti Pauhesti Pri Agung Rakhmanto Pri Agung Rakhmanto Ridho Abdillah Shabrina Sri Riswati Shabrina Sri Riswati Shabrina Sri Riswati Sonny Irawan Sugianto Kasmungin Sugiatmo Kasmungin Sutiadi, Andrian Syamsul Irham Wisup Bae Wydhea Ayu Septianingrum Yeriandi Utama