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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 619 Documents
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Impact Of Various Biodiesel And Partially Hydrogenated Biodiesel Mixtures On Torque, Power, And Specific Fuel Consumption: An Experimental Study With Mathematical Modelling I Ketut Gede Wirawan; I Nyoman Prayana Trisna
Scientific Contributions Oil and Gas Vol 47 No 3 (2024)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.47.3.1681

Abstract

The widespread reliance on diesel fuel for transportation and industrial applications necessitates exploring better alternatives. Biodiesel, either alone or in combination with partially hydrogenated biodiesel, presents a potential substitute for conventional diesel fuel. This research investigates the effects of incorporating biodiesel or partially hydrogenated biodiesel into diesel fuel on torque, power, and specific fuel consumption (SFC). The experiments incorporated seven mixtures of diesel fuel, varying from 100% diesel fuel to only 70% diesel fuel. The findings indicate that both biodiesel and partially hydrogenated biodiesel improve power, torque, and SFC compared to conventional diesel fuel, across various ratios and engine rotation. Optimal performance of these biodiesel blends is achieved around 2000 rpm. Additionally, the study developed mathematical models to predict torque and power, which were optimized for use at engine speeds of 2000 rpm and 4000 rpm, with biodiesel concentrations ranging from 10% to 30% in the fuel mixture.
The Effect of Co2-Brine-Rock Interaction Towards Sand Onset Modeling in Dolomite-Rich Sandstone: A Case Study in Air Benakat Formation, South Sumatera, Indonesia Prasandi Abdul Aziz; Bagus Endar Bachtiar Nurhandoko; Taufan Marhaendrajana; Utjok W.R. Siagian; Tutuka Ariadji
Scientific Contributions Oil and Gas Vol 47 No 3 (2024)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.47.3.1682

Abstract

Carbon Capture Utilization Storage (CCUS) into geological storage (e.g., Enhanced Oil or Gas Recovery) provides a solution to reduce CO2 emissions yet remains a potential operational problem, such as sand problem phenomena in producer well. This study performs several experimental works (i.e., time-lapse dry mass measurements, , X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and elastic wave measurements) by using CO2-brine-rock batch experimental setup to observe mineral dissolution, pore structures alteration as well as rock physics alteration due to CO2-brine-rock interactions.This study used an outcrop sample of dolomite-rich sandstone from Air Benakat formation, South Sumatera, Indonesia. Our experimental works observed dolomite dissolution, secondary porosity development as well as rock strength reduction indirectly due to CO2-brine-rock interactions. The results of elastic wave velocity measurements (i.e. P & S waves) were then used to modify a considerable sand onset prediction model. Thus, the modified model demonstrates that considering CO2-brine-rock interactions could help to design better sand management strategy in producer well.
IMPROVING HYDROCARBON RESIDUE FEED DEFINITION THROUGH VALIDATED SIMULATION MODELS Rinzan Akhirjulima; IGBN Makertihartha; Tri Partono Adhi; Anggit Raksajati
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1683

Abstract

The conventional development of deasphalting processes relies on costly and time-consuming lab experiments. This study introduces a more efficient approach using simulation to tackle these challenges. The method identifies the composition of synthetic crude oil (SCO) feedstock, dividing it into four key molecular groups: Saturates, Aromatics, Resins, and Asphaltenes (SARA). These groups are pseudo-components in the simulation, characterized by parameters like boiling points and molecular weights. The simulated boiling points are then compared with actual crude oil to ensure accuracy. The framework is applied to model hydrocarbon residue in Lube Oil production, testing adaptability across various feedstocks. The strategy to improve the simulation's accuracy was adjusting molecular interactions for asphaltene separation and refining pseudo-components. This resulted in a boiling point curve with an RMSD of 2.689, closely matching the actual residue curve. This approach improves the precision of deasphalting while reducing dependence on resource-heavy lab work.
SALT REVOLUTION: A SMART SOLUTION TO MEET THE NEEDS OF THE PETROLEUM INDUSTRY BY REFINING ROCK SALT THROUGH INNOVATIVE ABSTERSION METHODS Hamzah Hamzah; Badrut Tamam Ibnu Ali; Dorit Bayu Islam Nuswantoro; Soleh Iskandar; Didi Dwi Anggoro; Budiyono Budiyono; Hens Saputra; Mochammad Ismail; Imam Wahyudi; Fausiah Fausiah; Aminuddin Aminuddin
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1684

Abstract

The need for salt in the petroleum industry is very high, especially in drilling. This significant demand is not matched by salt production. Effective, low-cost, and environmentally friendly technology to produce salt of the appropriate quality is still a challenge in the petroleum industry. On the other hand, the amount of rock salt produced by salt farmers in Indonesia reaches 2.5 million tons per year. This research utilizes rock salt from salt farmers. It converts it into quality salt according to the needs of the petroleum industry by using a modified mixing washer method to increase NaCl purity and reduce impurity levels such as Ca2+ and Mg2+ ions. The results showed that rock salt was successfully converted into industrial-grade salt using the modified abstersion method with a mixer washer tool. The characteristics of the salt produced after the mixing washer are that it has a whiter and cleaner color than premium and rock salt. Mixer washer salt has a concentration of 98.80% NaCl, 0.064% Ca2+, and 0.062% Mg2+, meeting the standard for petroleum industry-grade salt and suitable for use in the drilling process.
EFFECT OF ADDING ULTRA FINE BUBBLE TO DIESEL AND BIODIESEL FUEL ON TWO WHEEL TRACTORS DIESEL ENGINE PERFORMANCE Sam Herodian
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1685

Abstract

Diesel engines have advantages in their use in various sectors, one of which is that they have high torque and power to cover heavy loads optimally. The fuel used in a diesel engine has a big impact on the performance produced by the diesel engine. Many fuel refinements have been carried out using various methods. The aim of this research is to test and analyze one method of improving Ultra Fine Bubble combustion in various diesel fuels. Ultra fine bubble is a method of adding nano-sized oxygen to fuel which is expected to improve engine performance. The method used is a performance test on a hand tractor axle dynamometer with B0 (diesel), B35 (biodiesel–diesel blends 35%) and biodiesel fuel. When adding UFB, differences in characteristic values ​​are produced in cetane number, fog point, lubricity, density, viscosity and flash point. The power produced on B0 fuel when given UFB increased by 3.46%, on B35 UFB increased by 7.45% and on biodiesel UFB increased by 1.6%. The increase in power that occurs in B35 and biodiesel is also followed by a decrease in the specific fuel consumption (sfc) value, while in B0 there is an increase in sfc when the fuel is given UFB.
PHYSICOCHEMICAL PROPERTIES OF B-0 CN 51 DIESEL FUEL WITH ULTRAFINE BUBBLES Husen Asbanu; Sam Herodian; Tineke Mandang; Anto Tri Sugiarto; Riesta Anggarani
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1686

Abstract

Ultrafine bubbles are nano-sized, much smaller than regular bubbles, and efficient in gas exchange processes, making them reactive in physical and chemical processes. The application of ultrafine bubbles includes medicine, agriculture, cleaning, and diesel engine fuels. The objective of this research is to analyze the impact of ultrafine bubble additives injected into B-0 CN 51 diesel fuel to enhance fuel performance. The research method involves injecting oxygen additives at flow rates of 1, 3, and 5 liter/minute into 1.5 liters of fuel for treatment durations ranging from 10 to 60 minutes. Observation parameters include distillation, cetane number, density, flash point, and cloud point. The results of oxygen injection at 1 liter/minute for 10 minutes found the highest values for viscosity at 2.65 mm²/s, density at 813,7 kg/m³, distillation at 341,2°C, cloud point at 7°C, and flash point at 67.4°C. Conversely, oxygen injection at 5 liters/minute for 60 minutes resulted in the lowest values for viscosity at 2.53 mm²/s, density at 801.3 kg/m³, distillation at 320.7°C, cloud point at 5.4°C, and flash point at 56.2°C. Meanwhile, the cetane number increased, with the highest value of 63 observed at an oxygen injection rate of 5 liter per minute for 60 minutes, and the lowest value of 56.5 observed at an injection rate of 1 liter/minute for 10-minute This research shows that the impact of ultrafine bubbles adds value to B-0 CN 51 fuel, creating a new product considering the promising cetana number.
STRESS REGIME ANALYSIS IN THE STRUCTURAL TRANSTITION BETWEEN SUMATRA AND JAWA Hikhmadhan Gultaf; Benyamin Sapiie; Wahyu Triyoso; Meli Hadiana; Yehezkiel Halauwet; Herlina Almanda Anna Maria Narwadan
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1687

Abstract

The structural transition between Sumatra and Java presents significant geological challenges due to the change in the orientation of the convergent plate boundary, shifting from NW-SE in western Sumatra to W-E in southern Java. This study focuses on the regions of Lampung (representing Sumatra's tectonics), West Java (representing Java's tectonics), and the Sunda Strait as the boundary between them. The research aims to map tectonic stress conditions using formal stress inversion methods based on earthquake focal mechanism data, constrained to depth intervals of 0-15 km and 15-33 km. Focal mechanism data are categorized by geographic and regional structural geology with kinematic homogeneity, leading to the identification of ten inversion zones. Findings show that Lampung's average stress regime ( ) is strike-slip fault regime at both depth intervals. The Sunda Strait displays a transtensive fault regime across these depths, while West Java has a thrust fault regime at 0-15 km, transitioning to strike-slip fault regime at 15-33 km.
FLUID-TO-FLUID AND FLUID-TO-ROCK INTERACTION ON SOPHOROLIPIDS BIOSURFACTANT FOR ENHANCED OIL RECOVERY: A LITERATURE REVIEW Taufan Marhaendrajana; Indah Widiyaningsih; Ivan Kurnia; Harry Budiharjo Sulistyarso
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1688

Abstract

The promising glycolipids produced by non-pathogenic yeast as biosurfactants are called sophorolipids. Their advantages over chemical surfactants are smaller environmental impact, lower toxicity, and biodegradable. They can reduce interfacial tension (IFT), form microemulsions, and alter wettability in enhanced oil recovery applications. The potential as biosurfactants is due to the resistance to high salinity and high temperature in reservoir conditions.Laboratory experiments for enhanced oil recovery (EOR) applications require to test fluid-to-fluid and fluid-to-rock interactions in the complex crude oil–rock–brine (CORB) system. This review discusses the sophorolipids mechanisms of fluid-to-fluid and fluid-to-rock interactions.Sophorolipids’ potential in EOR processes can be determined from core flooding experiments, in which some researches reported the incremental oil recovery up to obtained up to 20%. The review and discussion in this article are intended to have a broad impact on science and the petroleum industry, particularly in EOR applications.
PORE-SCALE 3D MODELING OF VISCOUS FINGERING FOR NON-NEWTONIAN HEAVY OIL RECOVERY Cindy Dianita; Muhammad Faturahman; Andi Mardianza
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1690

Abstract

Heavy oil recovery faces significant challenges due to the unstable displacement of oil by water, known as viscous fingering (VF). This occurs when low-viscosity fluids displace high-viscosity fluids, leading to inefficient oil recovery and increased water production. These issues reduce efficiency and increase environmental and economic costs, highlighting the need for improved simulation techniques to better understand and manage VF dynamics. This study examines the use of non-Newtonian Carreau fluids in modeling VF phenomena, offering more realistic simulations than Newtonian fluids. The shear-thinning behavior of Carreau fluids allows injected fluids to penetrate smaller pores effectively, influencing finger formation and growth. Current work, which incorporates non-Newtonian fluid characteristics, provides a more accurate representation of viscous fingering, including key features such as finger formation, merging, coalescence, blocking, tip-splitting, and expansion. Three porosity values (0.29, 0.5, and 0.7) are simulated to represent diverse reservoir conditions. A 3D computational fluid dynamics (CFD) model is utilized, employing the volume of fluid (VOF) approach to capture immiscible displacement processes. The model is validated using experimental data from coreflood studies. The results demonstrate that porosity significantly influences VF behavior, with lower porosities resulting in more pronounced finger formation, splitting, and coalescence. Non-Newtonian fluids decrease instability by moderating VF growth dynamics, enhancing displacement efficiency. These findings emphasize the importance of incorporating non-Newtonian fluid properties and porosity variations into VF simulations to optimize oil recovery processes. This study provides insights into VF dynamics, advancing the development of sustainable and efficient heavy oil recovery technologies.
The Emergence of Natural Hydrogen: Genesis and Current Perspectives Dr Himmat Singh
Scientific Contributions Oil and Gas Vol 48 No 1 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i1.1691

Abstract

In recent years, natural hydrogen has emerged as a promising source in the future energy mix. Since its accidental discovery in Mali in 2012, global interest in this form of hydrogen—often called geological, white, or gold hydrogen—has surged. Generated primarily through serpentinization, a process where water reacts with iron-rich minerals, natural hydrogen can become trapped in reservoirs beneath impermeable rocks. Other natural processes also contribute to its formation. A recent study by French geologists and Albanian scientists found hydrogen with 85% purity in a chromium mine, with minimal methane contamination, resulting in a low carbon intensity of around 0.4 kg CO2e per kg of hydrogen produced. According to Rystad Energy, white hydrogen could potentially transform the clean hydrogen sector, shifting it from an energy carrier to a primary energy source. Interest in natural hydrogen is growing rapidly, with the number of companies involved, increasing from 10 in 2020 to 40 by the end of last year. Exploration is underway in countries like Australia, the U.S., Spain, France, Albania, and Canada. Canada-based Hydroma, for instance, extracts white hydrogen at just $0.50 per kg, while projects in Spain and Australia aim for around $1 per kg. This suggests that natural hydrogen could offer a cost-effective, low-carbon energy alternative. This article examines the potential of natural hydrogen to play a key role in achieving a net-zero carbon future by exploring its science, economics, and ongoing global exploration efforts.

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