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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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Porosity-Controlled Flow Instability and Vibration Response in Conical Strainers: An Integrated Hydraulic-Structural Evaluation Amnur Akhyan; Mohd Azahari Bin Razali; Hendriko; Shahruddin Bin Mahzan; Iman Fitri Bin Ismail
Scientific Contributions Oil and Gas Vol 48 No 4 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i4.1960

Abstract

Research on how porosity can trigger vibrations due to flow-induced instability (FIV) partially clogged in perforated conical strainer has been conducted integrated experimental. Six conical filters with porosities between 25 and 40 percent, made in straight and staggered perforation patterns, were tested under clean and clogged conditions using a set of tools with a controlled closed-loop flow. Pressure drop, vibration amplitude, and frequency were measured simultaneously to capture the coupled hydraulic-structural response. The results show that the straight configuration with low porosity exhibits strong geometric constriction, which accelerates the formation of the jet flow, increases turbulence intensity, and strengthens the vibration amplitude as blockage increases. Conversely, strainers with a minimum porosity of 30 percent and staggered holes promote more uniform flow distribution, reduce shear layer instability, and result in a more stable frequency response. The effect of pressure drop on vibration confirms that clogged can lead to dynamic instability of the system, particularly in high-risk frequency bands common in piping facilities. These experimental results are highly relevant to oil and gas exploration and exploitation activities during drilling, well testing, and production operations. Where fluctuating flow rates, entrained solids, and increased clogging are unavoidable. These findings provide practical guidance for determining the porosity of conical strainers and the perforation layout to reduce hydraulic losses, mitigate vibration damage, and improve the operational reliability of piping systems in oil and gas facilities.
Structural Configuration and Paleogeography of The “Krishna” Field in The Sunda Basin Kharis Surya Wicaksana; Dumex Pasaribu; Humbang Purba
Scientific Contributions Oil and Gas Vol 48 No 4 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i4.1964

Abstract

The Krishna Field is located in the Sunda Basin and is estimated to have significant hydrocarbon potential. This study aims to analyze the subsurface conditions, geological structure configuration, and paleogeography of the field. The research utilizes 3D seismic data and drilling well data obtained from the Research and Development Center for Oil and Gas Technology “LEMIGAS”. The methodology for this study comprises several stages, namely the preparation stage, which involves a literature review and the process of acquiring supporting data. The data processing stage includes well-seismic tie, well correlation, horizon and fault picking, and the generation of structural and isopach maps. The analysis stage, in which the processed data is analyzed through electrofacies analysis, sequence stratigraphy, seismic stratigraphy, and depositional environment analysis. The results of the study indicate that during the pre-rift phase, the basement rocks were faulted by northeast-southwest trending normal faults with a dominant dip to the southeast, forming a half-graben basin structure. The Talang Akar Formation was deposited in a transitional environment as a syn-rift phase deposit. This was followed by a transgression event, marked by a rise in sea level, where the Baturaja Formation was deposited as a late syn-rift phase deposit, and subsequently followed by the Gumai Formation during the post-rift phase, which has a consistent layer thickness but a more complex and intense structure, deposited in a shallow marine environment.
Application of Bailer Technique for Idle Well Reactivation in Mature Fields: Case Study of SLF Field Sumatera Berkah Hani; Wahyu Sutresno
Scientific Contributions Oil and Gas Vol 48 No 4 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i4.1994

Abstract

This paper presents a field trial of wireline bailer cleanout to reactivate an idle oil well (SLL-06) in the mature SLF Field, South Sumatra Basin. The well had been shut in for several years due to severe debris accumulation and scale deposition. A low-capital bailer operation was used to remove wellbore obstructions and restore fluid communication. Eight successive bailer runs were conducted, and debris volume was quantified for each run. Results show a pronounced decline in recovered debris per run and an estimated cumulative removal of approximately 80% of the original obstruction. Post-cleanup measurements indicate a significant reduction in static fluid level of about 35% and a stabilized bottom-hole pressure (SBHP) profile, suggesting partial restoration of reservoir–wellbore connectivity. Following the intervention, the well resumed production at a low oil rate. A simplified economic assessment shows that the bailer operation required only 15–20% of the capital cost of a conventional workover. Under a conservative production assumption of approximately 30 bbl/d and an oil price of USD 70/bbl, the projected first-year revenue substantially exceeds the intervention cost. These findings confirm that wireline bailer cleanout is a technically practical and economically attractive first-step strategy for reactivating marginal wells where conventional artificial lift options are not economically viable.
The Significance of Nanofluids as Working Fluids in Energy Extraction Process on Geothermal Heat Exchanger System Utilizing Abandoned Oil Wells: A Review Dedhy Prihtiantoro; Mohamad Izzur Maula; Fitrian Imaduddin
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Geothermal energy offers significant potential as an environmentally friendly renewable resource; however, large-scale deployment remains constrained by high drilling and infrastructure costs. Repurposing abandoned oil and gas wells as geothermal heat exchanger systems has emerged as a promising alternative, yet research on the application of nanofluids in such systems remains limited and fragmented. This review employs a narrative synthesis approach to analyze more than 80 peer-reviewed studies related to wellbore geothermal heat exchangers, working fluids, and nanofluid thermal enhancement mechanisms. The review identifies a clear knowledge gap regarding the integration of nanofluids into geothermal heat extraction processes in deep coaxial and U-tube systems, particularly with respect to long-term stability, pressure drop, and techno-economic feasibility. Findings indicate that nanofluids—especially metal-oxide and hybrid formulations—can substantially enhance thermal conductivity and heat transfer performance, with TiO₂- and CuO-based nanofluids showing the most promising results. However, challenges remain in optimizing concentration, ensuring stability, and mitigating increased pumping power. Overall, this review provides a consolidated understanding of existing research and highlights key directions for future development to improve heat extraction efficiency in geothermal systems utilizing abandoned wells.
Polymer-Oxygen Scavenger For Oil Recovery in Sandstone Dhika Permana Jati; Ilham Ardatul Putra; Ratna Widyaningsih; Edgie Yuda Kaesti; Putri Diantha Hetharia
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Polymer degradation caused by dissolved oxygen remains a major challenge in Enhanced Oil Recovery (EOR) for sandstone reservoirs, especially under moderate salinity (18,000 ppm) and temperature (60°C) conditions, which accelerate viscosity loss. While HPAM polymers are highly effective, ensuring their long-term stability requires strategies that can preserve molecular integrity throughout the injection process. This study employs laboratory experiments to assess two HPAM variants (FP 3630 and FP 3230), both in conventional formulations and with an oxygen scavenger (NaHSO₃), using Bentheimer synthetic cores. Evaluations cover fluid-to-fluid (compatibility, rheology, filtration, thermal stability) and fluid-to-rock (injectivity, core flooding) performance under reservoir conditions. Results identify FP 3630 at 1400 ppm with 0.1% NaHSO₃ as the optimal formulation. The oxygen scavenger significantly improved thermal stability, reducing viscosity degradation from 32.83% to 4.24%. This formulation achieved an ideal Resistance Factor (11.44) and minimal formation damage (RRF 1.01), enhancing Recovery Factor from 67.38% to 87.29%. These findings confirm that the incorporation of oxygen scavengers effectively minimizes polymer degradation, establishing them as a crucial component for the successful implementation of EOR in moderate-salinity sandstone reservoirs.
Fluid-To-Fluid Interaction Of Rhamnolipid Biosurfactants With Divalent Ions: Investigation Of Interfacial Tension And Emulsion Viscosity Hariyadi; Ndaru Cahyaningtyas; Fanata Yudha Nugraha; Karina Larasti; Azhar Faari Fatahillah; Dian Indri Astuti
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

Rhamnolipid biosurfactants, derived from microbial sources, gain substantial interest as environmentally sustainable alternatives to synthetic surfactants, particularly in the realm of Microbial Enhanced Oil Recovery (MEOR). Their biodegradability, low toxicity, and effectiveness under extreme conditions make them ideal candidates for improving oil displacement in reservoir. However, the presence of divalent ions, specifically calcium (Ca²⁺) and magnesium (Mg²⁺), which are abundant in brine solutions in reservoirs, significantly affect the performance of these biosurfactants. This research investigates the influence of Ca²⁺ and Mg²⁺ ions on the phase behavior, stability, and interfacial properties of rhamnolipid-based microemulsion systems, which are integral to MEOR processes. A series of experiments analyze the impact of varying concentrations of Ca²⁺ and Mg²⁺ ions on rhamnolipid microemulsions. The study assesses phase transitions, stability, and the microstructure of these emulsions, utilizing spinning drop tensiometer to measure interfacial tension (IFT) and rheological analysis to determine viscosity. The results demonstrate that both Ca²⁺ and Mg²⁺ ions influence the optimal salinity conditions for microemulsion stability, with their presence causing shifts in the phase boundaries. Specifically, Ca²⁺ ions exert a more pronounced effect on phase stability compared to Mg²⁺, leading to increased IFT and viscosity at higher concentrations. The study further elucidates the crucial role of divalent ions in the stability and functionality of biosurfactant systems under reservoir conditions, emphasizing the importance of managing ion concentrations for efficient MEOR applications. These findings provide significant knowledge for optimizing the formulation of rhamnolipid-based systems to enhance oil recovery performance while mitigating the adverse effects of high divalent ion content in brine. The research contributes valuable understanding to ongoing efforts of improving biosurfactant efficacy, offering a pathway for refining MEOR strategies and advancing sustainable oil recovery technologies.
1D Basin Modeling and Geochemical Anaylsis of The Arafura Basin Michael D H Mamengko; David Victor Mamengko; Tri Peni Setyowati
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

The Arafura Basin is a frontier basin with significant hydrocarbon potential that remains not fully understood, particularly regarding source rock effectiveness across different structural settings. This study evaluates source rock potential, geochemical characteristics, and thermal maturity history using geochemical data and 1D basin modeling on five exploration wells (ABDX-1, BRX-1, KBX-1, KLX-1, and BBX-1). The analysis identifies several potential source rock intervals ranging from Permian, Jurassic, Cretaceous, to Tertiary ages. Geochemical evaluation reveals a stark contrast between depocenters and structural highs. Wells in the northern and southern depocenters (ABDX-1 and KLX-1) contain source rocks of fair to excellent quality that have reached optimal thermal maturity phases, ranging from peak to late mature. Conversely, wells in the structural high areas (BRX-1, KBX-1, and BBX-1) are proven to be non-generative as all source rock intervals remain immature due to insufficient burial history. Thermal history reconstruction indicates that the primary intensity of hydrocarbon generation occurred in the Neogene, triggered by a surge in sedimentation rates in response to the Melanesian Orogeny. This study concludes that exploration in the structural highs of the Arafura Basin carries high source rock risk, and successful hydrocarbon accumulation in these areas relies heavily on lateral migration mechanisms from active hydrocarbon kitchens developing in the northern and southern depocenters
Characterization Of Deltaic Source Rocks And Hydrocarbon Potential In The Lower Kutai Basin Jamaluddin; Desianto Payung Battu
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

The Lower Kutai Basin in East Kalimantan, Indonesia, partly covered by the modern Mahakam Delta, was examined to assess its hydrocarbon source rock potential and depositional environment. Geochemical analysis of Miocene shale samples reveals Total Organic Carbon (TOC) values ranging from 1.3 to 5.32 wt.%, indicating good to excellent organic richness with an average TOC of 2.5 wt.%. Hydrogen Index (HI) and Tmax results show that the organic matter is dominated by type III kerogen with minor type II/III, mainly derived from terrestrial higher plants. Tmax values between 425 and 447°C and vitrinite reflectance values of 0.64 – 0.77% indicate immature to early mature thermal stages. The Pr/n-C17 and Ph/n-C18 ratios suggest deposition under alternating oxic and anoxic conditions within a deltaic to shallow-marine setting influenced by a humid equatorial climate. These findings indicate that the Miocene shales of the Lower Kutai Basin possess strong gas-prone and mixed hydrocarbon generation potential, making them significant contributors to the petroleum system of the Mahakam Delta region.
Adsorption Performance Of Regenerated Molecular Sieves For Moisture Removal In Compressed Oxygen Gas M. Baqir; Fahrul Maulana; Rachmat Hidayat; Asep Nugraha; Zaeturohmah F; Jakariya
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

This study evaluates the adsorption performance of regenerated molecular sieves repurposed as moisture adsorbents for compressed oxygen gas. The spent adsorbents were collected from a Phase Technology Freezing Point analyzer after reaching saturation through repeated use. Two thermal regeneration methods were investigated: (1) staged heating in a furnace at 350 °C for two hours followed by a 30-minute vacuum treatment, and (2) staged heating in a gas chromatography (GC) oven at 350 °C with a dry-nitrogen purge for one hour, followed by one hour without purging and a 30-minute vacuum period. Physical characteristics after regeneration were assessed using UOP Method 422 for particle size distribution (PSD) via micromesh sieving. Moisture adsorption performance was measured according to ASTM D1142, based on dew-point determination using compressed oxygen at operating pressures of 30–50 psi and flow rates of 0.5–1.0 L/min. Results show that regenerated molecular sieves retained approximately 80–90% of the adsorption capacity of new material, with the GC-oven method offering slightly superior performance compared to furnace regeneration. These findings demonstrate that proper regeneration allows spent molecular sieves to be reused effectively, offering a technically viable and economically favorable strategy for moisture removal in oxygen-drying applications while minimizing laboratory waste.

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