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Scientific Contributions Oil and Gas
Published by LEMIGAS
ISSN : 20893361     EISSN : 25410520     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy
The Scientific Contributions for Oil and Gas is the official journal of the Testing Center for Oil and Gas LEMIGAS for the dissemination of information on research activities, technology engineering development and laboratory testing in the oil and gas field. Manuscripts in English are accepted from all in any institutions, college and industry oil and gas throughout the country and overseas.
Arjuna Subject : Energi (semua kategori) - Teknologi Bahan Bakar
Articles 27 Documents
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Search results for , issue "Vol 48 No 2 (2025)" : 27 Documents clear
The Structural Factors in Advancing CCS/CCUS Technology in Indonesia: A Comprehensive Analysis Luky Yusgiantoro; Tri Bagus Prabowo; Dedi Kristanto
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1780

Abstract

Indonesia is committed to the global initiative to reduce greenhouse gas emissions with the target of achieving Net Zero Emissions (NZE) by 2060. This reduction can be achieved through the application of CCS and CCUS technologies. CCUS technology utilizes CO₂ to enhance oil and gas production through Enhanced Oil Recovery (EOR) or Enhanced Gas Recovery (EGR) methods, while CCS functions to capture, transport, and securely store CO₂ in geological formations. On the other hand, Indonesia requires a consistent and affordable energy supply to support the achievement of NZE while maintaining economic growth. The government has set ambitious oil and gas production targets to safeguard economic stability. Therefore, CCS/CCUS technologies represent one of the most viable technical solutions to balance environmental needs with economic conditions. However, the implementation and commercialization of CCS/CCUS in Indonesia still face significant challenges. This study identifies several structural factors that influence CCS/CCUS policy implementation. Through structural modeling, we have identified CCS/CCUS variables with significant driving power and dependency power. The final modeling results indicate that the acceleration of CCS/CCUS implementation largely depends on the availability of storage capacity information and technological readiness. Based on these findings, we recommend that the Indonesian government adopt appropriate policies using a risk-managed approach in the development of CCS/CCUS.
Techno-Economic Analysis of Dme Implementation in Indonesia’s Household Energy Sector Faqih Supriyadi; Irawan Adhi Putra; Riva Yudha Abriyant; Danang Sismartono; Cahyo Setyo Wibowo; Bambang Priyono
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1804

Abstract

Indonesia's increasing demand for Liquefied Petroleum Gas (LPG) – projected to reach 13.2 million tonnes by 2050 – and its heavy dependence on imports, require alternative and sustainable fuel solutions. Among the options under development, researchers and industry stakeholders consider Dimethyl Ether (DME)—particularly from abundant domestic low-rank coal—a viable and strategic substitute. DME has physicochemical properties similar to LPG, as well as its compatibility with existing storage and distribution infrastructure. This comprehensive study evaluates the techno-economic aspects of replacing LPG with coal-based DME in the household sector. The factors analyzed include energy equity, production and distribution costs, and projected fiscal impacts on the national economy. Assuming a production capacity of 1.4 million tons per year and an Internal Rate of Return (IRR) of 12%, analysts estimate DME’s Free-On-Board (FOB) price at IDR 8.03 million per ton, with a benchmark price equivalent to LPG at IDR 16,666/kg. At this rate, replacing imported LPG with domestic DME can save the country's foreign exchange around IDR10.71 trillion per year, but has the potential to increase subsidies by IDR3.97 trillion. The government can use the foreign exchange savings to cover the potential increase in DME subsidies.
Comparative Performance Analysis of Natural Fruit Peel Extract and Na2EDTA As Environmentally Friendly Scale Inhibitors in Tubular Systems Novrianti; Taufiq Hidayat; Neneng Purnamawati; M. Ridha Fikri
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1813

Abstract

Scale found in production tubing is still a severe operational problem in the oil and gas industry. This shows the need for scale control using synthetic chemicals such as disodium ethylenediaminetetraacetate (Na2EDTA), hydrogen chloride (HCL), or hydrogen fluoride (HF). However, concerns about the environmental impact and sustainability of long-term use of synthetic materials promote the search for alternatives based on natural materials such as tannin. Therefore, this study aims to determine and compare the effectiveness of tannins from rambutan binjai (Nephelium lappaceum), rambutan nona (Nephelium mutabile), and mangosteen (Garcinia mangostana) peel extract as natural scale inhibitors against Na2EDTA performance. To achieve the objective, UV-Vis spectrophotometric analysis  carried is out and shows tannin containing 20.91% (rambutan binjai peel), 21.14% (rambutan nona peel, and 21.58% (mangosteen peel). Laboratory tests are conducted with variations in tannin volume (5 mL, 10 mL, and 15 mL) as well as soaking times of 20 and 60 minutes in 20ml distilled water. The results showed that the increase in tannin volume addition and soaking duration is positively correlated with the decrease in scale mass. The highest performance is shown by mangosteen peel extract, which reduce scale by 0.132 grams (6.6%) at 15 mL in 60 minutes. For comparison, Na2EDTA under the same conditions reduces 0.176 grams (8.8%). These results show the potential of tannin-rich fruit peel extract as an environmentally friendly and sustainable scale inhibitor alternative for oil and gas production systems.
Development of Analytical Method for Determination of Palm-Based Hydrotreated Vegetable Oil (Hvo) in Diesel Blends Using Gas Chromatography: Preliminary Study Sylvia Ayu Bethari; Handajaya Rusli; Muhammad Bachri Amran
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1816

Abstract

Hydrotreated vegetable oil (HVO) is a renewable paraffinic biofuel derived from the catalytic hydrotreatment of triglycerides, particularly from palm oil. Because HVO's hydrocarbon structure is so similar to petroleum diesel, it can be mixed directly with regular diesel fuel. But because of this structural similarity, it is very difficult to accurately quantify HVO in diesel blends, which is essential for maintaining fuel quality and complying with regulations. In this study, gas chromatography–mass spectrometry (GC-MS) was used to identify the compounds and gas chromatography–flame ionization detection (GC-FID) was developed to quantify biofuel HVO. The chromatographic profiles of diesel, HVO, and biodiesel displayed distinct hydrocarbon distributions. Two diagnostic peaks at retention times of 17.5 – 17.7 minutes, identified as heptadecane and 2,6,10,14-tetramethylpentadecane (pristane), were used for preliminary identification. The heptadecane peak, present in both diesel and HVO, was selected as a quantifier, while the heptadecane-to-pristane ratio of 1.25 in diesel was applied as a correction factor. The accuracy of the method was confirmed by the observation of a strong linear correlation (R2 = 0.9991) for HVO concentrations ranging from 0 to 40% v/v. Recovery rates ranging from 97.0% to 102.2% further illustrated how reliable the method is for routinely analyzing the amount of HVO in diesel blends.
Kinetics of Dissolution and Wormhole Formation in Carbonate Rocks Using Lactic Acid: A Laboratory Study Berkah Hani; Asep Kurnia Permadi; Utjok W.R. Siagian; Harry Budiharjo
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1817

Abstract

Matrix acidizing in carbonate reservoirs typically relies on hydrochloric acid (HCl), which reacts rapidly, causes equipment corrosion, and limits penetration depth. Laboratory experiments confirmed that lactic acid exhibits measurable reactivity with carbonate rocks under reservoir-representative conditions, with apparent first-order rate constants of 0.0841 min⁻¹ (0.05 M), 0.0814 min⁻¹ (0.10 M), and 0.0788 min⁻¹ (0.15 M) at 60 °C and 500 RPM. Moderate R² values (48–49%) suggest partial mass-transfer control and limited acid concentration sensitivity in this range. Arrhenius analysis between 60–90 °C yielded an activation energy of 63.8 kJ/mol, consistent with organic acid–carbonate reaction behavior. Core flooding experiments at 80 °C and 100 psi confirmed that injection rate significantly influences wormhole formation efficiency. Permeability increased from 2.54 mD to 6.25 mD. PVbt analysis revealed an optimal condition at 0.3 mL/min (PVbt ≈ 0.73), supporting dominant wormhole formation, while lower rates (0.1 mL/min, PVbt ≈ 2.7) led to uniform dissolution and higher acid consumption. Intermediate and high rates (0.5 and 0.9 mL/min) generated ramified/branching channels. Overall, the study demonstrates that bio-derived lactic acid is a safer, less corrosive, and environmentally responsible alternative to conventional HCl acidizing, offering well-defined kinetic parameters and validated injection strategies that support efficient wormhole development.
Co-optimization of Carbon Capture, Utilization, and Storage (CCUS) Project Using Iterative Latin Hypercube Sampling (ILHS) Dr. Eng. Utomo Pratama Iskandar; Masanori Kurihara
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1818

Abstract

Economic optimization of Carbon Capture, Utilization, and Storage (CCUS) projects, which simultaneously enhance oil recovery through CO₂-EOR while permanently storing CO₂, is critical to ensuring project viability amidst energy market volatility and operational uncertainties. This study develops and applies an Iterative Latin Hypercube Sampling (ILHS) algorithm, an adaptive, stratified sampling technique that accelerates convergence by iteratively re-weighting high-probability sub-regions, to determine the optimal CO₂ injection rate, using Net Present Value (NPV) as the unified economic criterion. The algorithm is coupled, via a FORTRAN driver, to the CMG-GEM compositional simulator and applied to the PUNQ-S3 field case; the economic model explicitly includes the CO₂ purchase price (US$60 t⁻¹), carbon credits (US$40 t⁻¹) and capital expenditure (CAPEX = US$40 million + US$12 000 × Qᵢ) to capture key financial drivers. Three economic scenarios combining oil prices of US$70 bbl⁻¹ and US$30 bbl⁻¹ with discount rates of 0 % and 10 % are evaluated to quantify NPV sensitivity. ILHS converged in ≤130 simulation runs (≈3 h CPU time), identifying scenario-specific optimum injection rates of 8.1–8.6 × 10³ m³ day⁻¹ that deliver NPVs ranging from US$1.9 billion to US$4.6 billion. By bridging the gap between technically oriented and financially oriented optimization, the proposed framework offers a scalable, computationally efficient approach for co-designing oil recovery and CO₂ storage under dynamic market conditions, thereby advancing field-scale CCUS decision making.
Effects of Homogeneous and Heterogeneous Mineralogy in Carbonate Acidizing Wahyu Sutresno
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1820

Abstract

A series of carbonate acidizing coreflood experiments using HCl was conducted on core samples from the Kujung Formation, offshore Northwest Java. Using XRD, SEM, and thin-section petrography, these samples were characterized as exhibiting varying degrees of heterogeneity. X-ray diffraction analysis showed that core plug Sample 7 consists of about 93% calcite, 3% dolomite, and 1–2% gypsum and pyrite, whereas core plug Sample 2 contains nearly 99% calcite. Mineralogical heterogeneity can affect the success of acidizing stimulation by determining the geometry (shape and size) of the wormholes that form. In addition to mineralogical heterogeneity, the presence of impurities in the rock may also influence the acidizing process and its outcomes. Conversely, in more homogeneous carbonate samples, a more uniform acid attack is observed. In homogeneous samples, carbonate dissolution was found to extensively “clean” clays and fine particles from the pore space. This study is expected to demonstrate different processes for enhancing permeability and porosity when using core samples of heterogeneous versus homogeneous mineralogy in carbonate acidizing applications.

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