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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 635 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 Prihtiantoro, Dedhy; Maula, Mohamad Izzur; Imaduddin, Fitrian
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1815

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 Jati, Dhika Permana; Hetharia, Putri Diantha; Damayandri, Dadan; Widyaningsih, Ratna; Kaesti, Edgie Yuda; Taufantri, Yudha; Putra, Ilham Ardatul
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1854

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 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 improves thermal stability and reduces viscosity degradation from 32.83% to 4.24%. This formulation achieves an ideal Resistance Factor (11.44) and causes minimal formation damage (RRF 1.01), while enhancing the Recovery Factor from 67.38% to 87.29%. These findings confirm that the incorporation of oxygen scavengers effectively minimizes polymer degradation and establishes them as a crucial component for the successful implementation of EOR in moderate-salinity sandstone reservoirs.
Identification and Mitigation of Stuck Pipe Problem During Cement Drill-Out Cement in XSF Well Suranta, Bambang Yudho; Sofyan, Akhmad; Siahan, Paradongan; Sidiq, Asep
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1905

Abstract

This study aimed to develop an integrated diagnostic framework to identify pack-off–type stuck pipe during cement drill-out operations and strengthen quantitative risk assessment for workover interventions. A stuck pipe event in the XSF well (9-5/8-in. section) at 724.42 m was investigated using drilling data, drill-string mechanics, drilling fluid evaluation, and hydraulic/cutting-transport analysis. The results of the mechanical assessment showed that excessive loading and overpull were unlikely primary causes of stuck pipe problem. However, the hydraulic and transport evaluation showed inadequate cutting removal, consistent with particle settling and progressive pack-off formation. To evaluate this event, a diagnostic classification matrix combining four operational indicators was applied, showing complete agreement with an established pack-off classification method. The pipe was ultimately freed after 99 hours using controlled tension-cycling with spotting-fluid support. Based on the transport analysis, this study recommended operational controls, which included maintaining a minimum circulation rate of 340 GPM and the use of shale shakers during cement removal to reduce pack-off risk. Furthermore, the prolonged liberation time showed the substantial cost impact of stuck pipe problem, supporting the economic case for preventive implementation.
Fluid-To-Fluid Interaction of Rhamnolipid Biosurfactants with Divalent Ions: Investigation of Interfacial Tension and Emulsion Viscosity Hariyadi; Cahyaningtyas, Ndaru; Nugraha, Fanata Yudha; Larasati, Karina; Fatahillah, Azhar Faari; Astuti, Dian Indri
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1927

Abstract

Rhamnolipid biosurfactants derived from microbial sources have 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 reservoir brine, can 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 play a critical role in MEOR processes. A series of experiments was conducted to analyze the impact of varying concentrations of Ca²⁺ and Mg²⁺ ions on rhamnolipid microemulsions. The study evaluated phase transitions, stability, and microstructural characteristics of emulsions using a 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 required for microemulsion stability, with their presence causing shifts in the phase boundaries. Notably, Ca²⁺ ions exert a more pronounced effect on phase stability compared to Mg²⁺, leading to increased IFT and viscosity at higher concentrations. These findings further elucidates the crucial role of divalent ions in governing the stability and functionality of biosurfactant systems under reservoir conditions and highlight the importance of controlling ion concentrations to achieve efficient MEOR applications. Overall, this research provide valuable insight 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 to ongoing efforts to improve biosurfactant efficacy, offering a pathway toward refining MEOR strategies and advancing sustainable oil recovery technologies.
Bridging The Gap in Non-Process Energy Management: A Comprehensive Audit of A Power Plant Site Office in Power Generation Facilities Linked to Oil and Gas Operations Mohd Nor, Norfakhira; Razali, Mohd Azahari; Adha Narrudin, Nur Syafiqah; Suzuki, Masataro; Tarmizi Nasir, Ahmad; Akhyan, Amnur
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1937

Abstract

Energy efficiency research in oil and gas and power generation facilities has predominantly focused on core process systems, while non-process energy consumption in ancillary and administrative buildings remains under- represented in both regional and international literature. Existing building energy audit studies largely emphasise standalone commercial and institutional buildings, offering limited insight into site offices embedded within industrial facilities operating under extended schedules and tropical climatic conditions. This study addresses this gap by presenting a comprehensive non-process energy audit of a site office supporting a coal-fired power generation facility linked to oil and gas operations in Malaysia. The audit follows Malaysian Standard MS1525:2019 and integrates two years of electricity consumption data (April 2023–March 2025), Building Energy Intensity (BEI) benchmarking, end-use load apportioning, and indoor environmental quality (IEQ) assessment. The seasonal analysis confirmed that electricity consumption is strongly influenced by climate-driven cooling demand, with higher peaks occurring during hotter months. However, reductions in base-load consumption during milder periods reveal opportunities for improved operational efficiency and highlight the importance of distinguishing climate effects from controllable energy use when interpreting performance in industrial office environments. The site office recorded a BEI of 172.7 kWh/m²/year, exceeding the MS1525;2019 benchmark of 135 kWh/m²/year and lying at the upper range of values reported for conventional office buildings in tropical climates. HVAC systems dominate electricity consumption (55%), followed by lighting (24%) and general equipment (14%), indicating higher cooling dependency than typically observed in non-industrial office studies. Visual inspection revealed widespread over-illumination, while IEQ assessment identified temperature fluctuations and intermittent CO₂ exceedances, reflecting inconsistencies in environmental control. Collectively, these findings indicate that inefficiencies arise from the combined effects of HVAC operation, lighting design, and control strategies. Addressing these areas holistically offers potential to reduce BEI, flatten peak demand, and improve occupant comfort, while supporting integrated industrial energy management under Malaysia’s NEEAP and EECA 2024.
Adsorption Performance of Regenerated Molecular Sieves for Moisture Removal in Compressed Oxygen Gas Febriyanti, Zaeturohmah; M. Baqir; Maulana, Fahrul; Nugraha, Asep; Hidayat, Rachmat; Jakariya
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1952

Abstract

This study focuses on evaluating the adsorption performance of regenerated molecular sieves repurposed as moisture adsorbents for compressed oxygen gas. The spent adsorbents are collected from a Phase Technology Freezing Point analyzer after saturation is achieved through repeated operational cycles. Two thermal regeneration methods are  investigated, namely (1) staged heating in a furnace at 350 °C for 2 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 an hour, followed by another 1 hour without purging and a 30-minute vacuum duration. Furthermore, the physical characteristics after regeneration are assessed using the UOP Method 422 for particle size distribution (PSD) through micromesh sieving. Moisture adsorption performance is evaluated according to ASTM D1142 using a dew-point measurement with compressed oxygen at operating pressures and flow rates of 30–50 psi and 0.5–1.0 L/min, respectively. The results indicate that regenerated molecular sieves retain approximately 80–90% of the adsorption capacity of new material, which demonstrates that the GC-oven regeneration method exhibits slightly superior performance compared to furnace regeneration. These finding prove that appropriate thermal regeneration enables effective reuse of spent molecular sieves, providing a technically viable and economically favorable strategy for moisture removal in oxygen-drying applications while reducing laboratory waste.
Reservoir Engineering Evaluation of Water Rock Compatibility and Permeability Damage in PX Field: Compatibility Injection Water and Reservoir Rahayu, Cece; Hardi, Maulana; Rizqullah , Muhammad Daffa; Wardani, Oktaviani Kusuma
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1955

Abstract

Compatibility between injection fluids and reservoir rocks is a crucial factor in the success of waterflooding operations, particularly in reservoirs with complex characteristics. Therefore, this study aimed to evaluate injection water–reservoir rock compatibility from a reservoir engineering perspective, focusing on permeability impairment mechanisms associated with fine migration and suspended solids during water injection in the PX Field. Rock samples were obtained from a selected formation, while injection water was collected from the Water Injection Plant (WIP). Laboratory experiments were conducted by injecting both Total Suspended Solids (TSS)-free water and water containing TSS into 1.5-inch core plugs positioned vertically in a Hassler-type core holder under an overburden pressure of 1,725 psi, backpressure of 250 psi, and room temperature conditions. Moreover, the injection water viscosity during the process of the experiment was 0.95 cP. The results showed a pronounced permeability reduction of up to 98% in the PX Field sample. The permeability decline occurred rapidly and intermittently in distinct stages, which initially proposed clay swelling as a possible mechanism. However, X-ray diffraction (XRD) analysis presented negligible smectite content, excluding clay swelling as the dominant cause of damage. Permeability impairment was primarily attributed to pore blockage from fine migration and suspended particles, as supported by particle size distribution (PSD) and TSS analyses. These results showed the importance of comprehensive rock–fluid compatibility evaluation before water injection implementation to minimize formation damage and optimize waterflooding performance.

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