cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Wulandari
Contact Email
jurnal.lemigas@esdm.go.id
Phone
+6221-7394422
Journal Mail Official
jurnal.lemigas@esdm.go.id
Editorial Address
Jl. Ciledug Raya Kav. 109, Cipulir, Kebayoran Lama, Jakarta Selatan 12230
Location
Kota adm. jakarta selatan,
Dki jakarta
INDONESIA
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
 53   54   55   56   57 
Geochemical Characteristics of Bintuni Oil Seep, Oil-Oil Correlation, and Oil-Source Rock Correlation Using Biomarker Data in The Bintuni Basin, West Papua Eriko Sabra; Hanif Mersil Saleh
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.v48i2.1740

Abstract

This study conducts a geochemical analysis of oil seepage and its correlation with existing oil and source rock. Biomarker analysis indicates that the Bintuni oil seep likely originates from a Tertiary source rock deposited in a transitional environment under sub-anoxic conditions, with a dominant terrestrial input and experienced slight biodegradation. The sample exhibits Pr/Ph values of 1.48 and 1.49, a dominance of C29 sterane, diasteranes/steranes ratios of 0.83 and 0.84, C29/C30 hopane ratios of 0.39 and 0.43, homohopane indices of 0.01 and 0.02, and high oleanane indices of 0.69 and 0.61. Oil to oil correlation reveals that the Bintuni oil seep is correlated with oil from the Salawati Basin and the Manimeri oil seep. The common characteristics among these three samples include the presence of oleanane, kerogen type II/III, Pr/Ph ratio, and redox conditions. However, differences are observed in the dominant material input: the Bintuni oil seep is dominated by C29, whereas Salawati oil exhibits a balanced C27-C28-C29 ratio, and Manimeri Oil Seep is dominated by C27. Correlation with the Ofaweri-1 oil stain in the Bintuni Basin indicates similarities in the dominance of C29. However, differences exist in the oleanane index and salinity, as the Bintuni oil seep has a higher oleanane index and lacks of gammacerane. Oil to source rock correlation suggests that the Bintuni oil seep shares characteristics with samples from the Klasafet Formation, including type II/III kerogen, a land-plant source, the absence of gammacerane, high oleanane content, and similarly high C29 values. The difference between these two samples lies in the values of tricyclic terpanes, Pr/Ph value, and the oxidizing conditions. The Bintuni Oil Seep has lower tricyclic terpane values, lower Pr/Ph value, and was deposited under more anoxic conditions. The similarity in characteristics with several Tertiary oils and the Klasafet Formation indicates that the Bintuni oil seep likely originates from the Klasafet Formation.
Determining The Role of Ion Exchange in Permeability Alteration During Asp Injection: A Laboratory-Scale Study Using Cmg Reactive Transport Modeling Dike Fitriansyah Putra; Mohd Zaidi Jaafar; Tengku Amran Tengku Mohd; Novia Rita; Agus Dahlia; Ichsan Al Sabah Lukman; M. Haidar T. Putra
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.v48i2.1744

Abstract

Electrokinetic-based Enhanced Oil Recovery (EK-EOR) presents a novel method that applies electric fields to mobilize trapped hydrocarbons in formations with low permeability. This work investigates the impact of ion exchange and mineralogical reactions on permeability behavior during Alkali-Surfactant-Polymer (ASP) flooding, integrating laboratory-scale sand-pack experiments with reactive transport simulation in CMG-GEM. During ASP injection, a marked rise in differential pressure indicated abrupt changes in permeability caused by polymer accumulation, mineral dissolution, and early-stage ion exchange. Two numerical scenarios were assessed: one involving only aqueous-phase chemistry, and another incorporating fluid reactions and solid-surface ion exchange. The latter case required minimal calibration to match experimental data, while the former demanded unrealistic permeability upscaling. The results underscore ion exchange as a vital mechanism influencing fluid transport in EK-EOR. Although wettability alteration is often associated with ASP processes, this study suggests that under short exposure periods, changes in permeability dominate recovery performance. The findings improve reservoir modeling by promoting geochemical integration into simulation workflows.
Real Data-Driven Seismic Low Frequency Extrapolation: A Case Study from The Asri Basin, Java Sea, Indonesia Ignatius Sonny Winardhi; Asido Saputra Sigalingging; Ekkal Dinanto
Scientific Contributions Oil and Gas Vol 48 No 3 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i3.1748

Abstract

The Asri Basin, located in the Java Sea, Indonesia, is a significant hydrocarbon province with regions that remain underexplored. The available legacy seismic data, however, are limited in quality, particularly due to their narrow frequency bandwidth and the absence of low-frequency components. This limitation poses a significant challenge for advanced seismic imaging techniques such as Full Waveform Inversion (FWI), which rely low-frequency data to generate accurate and reliable subsurface models. This study aims to reconstruct the missing low-frequency (<10 Hz) components from the band-limited seismic data to enhance the applicability of FWI. A real-data-driven, self-supervised learning approach for low-frequency extrapolation is implemented to address this challenge. Using a modified U-Net architecture, the framework is trained directly on the available band-limited seismic data, eliminating the need for synthetic or labeled datasets. The self-supervised workflow employs a frequency-specific masking strategy that enables the model to learn and predict the missing low-frequency content from higher-frequency inputs. The results demonstrate that the proposed method effectively recovers low-frequency signals, achieving accurate reconstruction down to <5 Hz, reducing residual amplitudes compared to conventional methods, and preserving the mid-to-high frequency spectrum. This approach provides a promising solution for overcoming data limitations and mitigating cycle-skipping issues in FWI applications within the Asri Basin and comparable geological settings.
The Use of Modified Rock Physics Template to Monitor Fluid Saturation in Carbonate Reservoir Riskiray Ryannugroho; Sonny Winardhi; Djoko Santoso; Mohammad Rachmat Sule; Krishna Agra Pranatikta; Fernando Lawrens Hutapea; Dona Sita Ambarsari
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.v48i2.1749

Abstract

Rock physics template (RPT) is defined as a crossplot of acoustic impedance (AI) against the ratio of P- and S-wave velocities that is used for lithology and pore-fluid interpretation of well log data and/or pre-stack seismic inversion results. This study is employing an interactive RPT approach, which facilitates calibration using available data and enhances the interpretation and prediction of pore fluids within carbonate reservoir rocks. A previously established RPT model is modified to construct the rock physics template and to interpret trends in porosity and fluid saturation within a predictive framework. The modified approach to the RPT formulation demonstrates that the proposed model yields more accurate porosity and fluid saturation trends for the reservoir rocks in the study area than the previous RPT model, as evidenced by the theoretical curves in the Rock Physics Template (RPT) domain. To predict fluid saturation, a workflow is developed to build the modified RPT model that incorporates the Curved Pseudo Elastic Impedance (CPEI) and the Pseudo Elastic Inversion for Lithology (PEIL) attributes. These attributes are used to regulate the fluid saturation and density values in the model space and to assist in constructing the RPT model. The proposed method is also applied to monitor fluid saturation changes in oil, gas, or CO₂ cases, utilizing the Vp/Vs ratio and acoustic impedance derived from the seismic inversion data, and allows calibration with available datasets such as well logs and cores.
A Hybrid Probabilistic-Backpropagation Neural Network Solver for Nonlinear Systems in Reservoir Simulation Adrianto; Zuher Syihab; Sutopo; Taufan Marhaendrajana
Scientific Contributions Oil and Gas Vol 48 No 3 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i3.1751

Abstract

Reservoir simulation requires solving large, sparse systems of nonlinear equations, where iterative Krylov subspace solvers such as the conjugate gradient (CG), stabilized conjugate gradient (BiCG-STAB), and generalized minimal residual (GMRES) are widely applied. However, these methods often have limitations in terms of their stability and accuracy in nonlinear systems. This paper introduces a hybrid probabilistic backpropagation neural network (Prob-BPNN) solver that integrates neural-network-based initialization with probabilistic inference to improve robustness. The solver was benchmarked against CG, BiCG-STAB, and GMRES using two synthetic reservoir models with the GMRES solution at a tolerance of 10-10, serving as the reference solution. The results show that Prob-BPNN consistently achieved production profiles closely matching the reference solution, with errors of MAE ≤ 0.066, RMSE ≤ 0.071, MAPE ≤ 2.04%, and R2 ≥ 0.945. In contrast, CG and BiCG-STAB produced unstable and nonphysical results, with errors exceeding 292% and negative R2 values. In terms of computational performance, Prob- BPNN required 9.96 s in Case 1 and 45.90 s in Case 2, compared to 2.85 s and 1.53 s for GMRES, respectively. Although more computationally expensive, Prob-BPNN delivered convergence on the same residual order of magnitude (below 10-3) as GMRES while avoiding the severe instabilities observed in CG and BiCG-STAB. These findings indicate that the Prob-BPNN is preferable in applications where solver robustness and accuracy are critical, even at the expense of a higher execution time. Future research should focus on reducing computational overhead through parallelization and hybridization strategies to enhance the scalability of large-scale reservoir models.
Economic Analysis of Marginal Oil Field Development by Testing The Feasibility of GVM in Sharia Method Against NPV Muhammad Ariyon; Ellyan Sastraningsih; Siti Nurhayati; Putri Rahmatillah
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.v48i2.1752

Abstract

A marginal oil field (MOF) is a field with relatively small hydrocarbon reserves located at significant depths. This presents major technical and economic challenges for its development. In the Central Sumatra Basin, a MOF with fair development potential has been discovered. The development of this MOF has to be analyzed to determine its feasibility. Previous research has predominantly evaluated oil field feasibility using conventional metrics, such as net present value (NPV) and profitability index (PI). However, assessing feasibility with a Syariah economic approach is an underdeveloped area of study. This study aims to compare conventional and Syariah methods for assessing MOF feasibility. The study involved field observation, primary and secondary data collection, calculation of reserves and oil production, cost estimation, oil price forecasting, and cash flow preparation based on a production sharing contract gross split contract scheme. The economic evaluation was conducted using conventional economic indicators (NPV, internal rate of return (IRR), payout time (POT), and PI) and Syariah indicators, namely, the gold value method (GVM) and gold index (GI). It is found that the development of the MOF is economically feasible. The NPV reached USD 172.27 million, with an IRR of 16.50%, a POT of 3.86 years, and a PI of 1.04. Moreover, the GVM was 10,687.03 grams of gold, and the GI stood at 1.20. This study demonstrates that the results of the Syariah method are consistent with those of the conventional methods, affirming its viability as an alternative evaluation approach for MOF development.
The Influence of Fluid Dynamics on Physical Uncertainties of Hydrocarbon Reservoir Imam Setiaji Ronoatmojo; Muhammad Burhannudinnur; Yarra Sutadiwiria; Dewi Syavitri; Grace Stephani
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.v48i2.1761

Abstract

Uncertainty is often present in the relationship between physical property variables and the complexity increases, when mechanical properties are included. The problems becomes more interesting in cases, where fluid dynamics act as the primary contributing factor. Pore pressure changes is the main actor of every uncertainty of physical properties. Therefore, this study aimed to examine the influence of fluid dynamics on physical uncertainties of hydrocarbon reservoir. To achieve this objective, well data from production and enhanced oil recovery (EOR) operations between 1994 to 2007 were entangled. Specifically, 3D seismic data was incorporated to distribute physical and mechanical properties after well periodization. In this study, the impact of pore pressure changes on minimum horizontal stress from 1994-2017 was also examined. The results showed that changes in porosity were not significant, but variations in bulk modulus and Poisson's ratio remained observable. Furthermore, tensors field were not dominated by vertical stress, instead of horizontal stresses. Changes in pore pressure apparently had a significant impact on minimum horizontal stress. The increase of  minimum horizontal stress reached approximately one third of pore pressure change. Consequently, the stress regime transitioned from the strike-slip fault in 1994 to thrust fault in 2017, emphasizing a significant increase in the influence of horizontal stress. While water injection and oil production did not lead to significant changes in physical properties, the effects were evident in the variations of Poisson's ratio.
Scenario-Based Evaluation of Economic Feasibility and Risk in City Gas Networks: A Case Study From East Java, Indonesia Deddy Tricahyo Utomo; Cindy Dianita
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.v48i2.1766

Abstract

This study aims to evaluate the economic feasibility and develop optimization scenarios for a natural gas distribution network intended for household use. The case study employs existing gas pricing and consumption data from East Java Province to support realistic economic modeling. The analysis examines how three important factors the number of customers, the price of gas, and how much gas is used affect key economic measures: net present value (NPV), internal rate of return (IRR), payback period (PP), and benefit-cost ratio (BCR). The research methodology includes secondary data collection, simulation of six different scenarios, and sensitivity analysis to examine the critical factors influencing project viability. Simulation results indicate that the scenario assuming a 25% increase in both gas selling price and gas consumption yields the most favorable economic performance, with an IRR of 14.21% and a payback period of less than seven years. The novelty of this study lies in its integrated use of scenario-based economic modeling, sensitivity analysis, and international benchmarking with comparable industries. Unlike conventional feasibility studies that focus solely on regional expansion, this research underscores the strategic role of pricing and consumption patterns as key determinants of financial sustainability in residential gas networks. The findings from the sensitivity analysis reveal that gas selling price has the most significant impact on economic performance, followed by gas consumption rate. These insights reinforce the importance of pricing adjustments and consumption optimization in enhancing the financial and operational sustainability of natural gas distribution networks. The study concludes with strategic recommendations for operators and policymakers to advance efficient and resilient gas-based energy infrastructure.
Characterization of Resin-Coated Silica Sand from Tibawan Rokan Hulu for Potential Use as Proppant Novrianti Novrianti; Novia Rita; Budi Prayitno; M. Faruq; Ilham Arif
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.v48i2.1767

Abstract

This study is aiming to evaluate the properties of quartz sand in Tibawan, Rokan Hulu in order to determine its suitability as proppant material for the oil and gas industries. The evaluation of these materials is being carried out based on the guidelines of American Petroleum Institute (API) 19C criteria, specifically assessing sphericity, roundness, bulk density, turbidity, acid solubility, and crush resistance. Furthermore, a surface modification process is being carried out where the sand is being coated with epoxy resin in three different weight variants (6 grams, 9 grams, and 12 grams) to investigate the effect of this treatment on the material's physical and mechanical characteristics. The test results are confirming that the sample covered with 12 grams of epoxy resin (Sample 4) passed all API 19C specifications. In contrast, other samples are showing weaknesses in one or more parameters considered. The sample 4 is showing a value of 0.62 roughness, 0.85 sphericity, 1 turbidity, 0.91 g/cm³ bulk density, 2.5 percentage acid soluble, and 6.05 percentage mass loss at a pressure of 7000 psi. These observations are indicating the potential of Tibawan quartz sand, modified by epoxy resin, as a non-conventional proppant that is being used in the hydraulic fracturing of upstream oil and gas activities.
Comparative Analysis of The Use of Nanosilica and Potassium Chloride as Shale Inhibitor in Water Based Mud Nur Suhascaryo; Syifa Khasyikirana Ramadhanti; Ketut Rama Wijaya; Miftahul Jannah
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.v48i4.1768

Abstract

Swelling shale is one of the most common problems encountered in oil and gas drilling operations. Potassium chloride (KCl) is widely applied as a shale inhibitor due to its ionic inhibition mechanism; however, excessive KCl concentrations can have detrimental effects on drilling mud performance. This study examines the potential of nanosilica derived from geothermal industrial waste as a substitute for KCl. Five mud samples were tested: base fluid, 1% nanosilica, 3% nanosilica, 1% KCl, and 3% KCl. The samples were evaluated through a series of physical property tests, including density, rheology, filtration loss, pH, methylene blue test (MBT), K⁺ concentration, and Cl⁻ concentration. Swelling-related parameters were also assessed using Linear Swelling Meter (LSM), accretion tests, and erosion tests under both before hot rolling (BHR) and after hot rolling (AHR) conditions at 200°F for 16 hours. The results indicate that nanosilica improved rheological properties and reduced shale swelling compared to the base fluid. Meanwhile, the 1% KCl formulation demonstrated strong performance in LSM and erosion tests. Overall, nanosilica shows potential as a partial substitute for KCl as a shale inhibitor; however, surface modification and field-scale validation are recommended for further confirmation.

Page 55 of 62 | Total Record : 619

 53   54   55   56   57 

Filter by Year

1982 2026


Reset
Filter By Issues
All Issue Vol 49 No 1 (2026) Vol 48 No 4 (2025) Vol 48 No 3 (2025) Vol 48 No 2 (2025) Vol 48 No 1 (2025) Vol 47 No 3 (2024) Vol 47 No 2 (2024) Vol 47 No 1 (2024) Vol 46 No 3 (2023) Vol 46 No 2 (2023) Vol 46 No 1 (2023) Vol 45 No 3 (2022) Vol 45 No 2 (2022) Vol 45 No 1 (2022) Vol 44 No 3 (2021) Vol 44 No 2 (2021) Vol 44 No 1 (2021) Vol 43 No 3 (2020) Vol 43 No 2 (2020) Vol 43 No 1 (2020) Vol 42 No 3 (2019) Vol 42 No 2 (2019) Vol 42 No 1 (2019) Vol 41 No 3 (2018) Vol 41 No 2 (2018) Vol 41 No 1 (2018) Vol 40 No 3 (2017) Vol 40 No 2 (2017) Vol 40 No 1 (2017) Vol 39 No 3 (2016) Vol 39 No 2 (2016) Vol 39 No 1 (2016) Vol 38 No 3 (2015) Vol 38 No 2 (2015) Vol 38 No 1 (2015) Vol 37 No 3 (2014) Vol 37 No 2 (2014) Vol 37 No 1 (2014) Vol 36 No 3 (2013) Vol 36 No 2 (2013) Vol 36 No 1 (2013) Vol 35 No 3 (2012) Vol 35 No 2 (2012) Vol 35 No 1 (2012) Vol 34 No 3 (2011) Vol 34 No 2 (2011) Vol 34 No 1 (2011) Vol 33 No 3 (2010) Vol 33 No 2 (2010) Vol 33 No 1 (2010) Vol 32 No 3 (2009) Vol 32 No 2 (2009) Vol 32 No 1 (2009) Vol 31 No 3 (2008) Vol 31 No 2 (2008) Vol 31 No 1 (2008) Vol 30 No 3 (2007) Vol 30 No 2 (2007) Vol 30 No 1 (2007) Vol 29 No 3 (2006) Vol 29 No 2 (2006) Vol 29 No 1 (2006) Vol 28 No 3 (2005) Vol 28 No 2 (2005) Vol 28 No 1 (2005) Vol 27 No 3 (2004) Vol 27 No 2 (2004) Vol 27 No 1 (2004) Vol 26 No 2 (2003) Vol 26 No 1 (2003) Vol 25 No 3 (2002) Vol 25 No 2 (2002) Vol 25 No 1 (2002) Vol 24 No 2 (2001) Vol 24 No 1 (2001) Vol 23 No 3 (2000) Vol 23 No 2 (2000) Vol 23 No 1 (2000) Vol 22 No 2 (1999) Vol 22 No 1 (1999) Vol 21 No 2 (1998) Vol 21 No 1 (1998) Vol 18 No 2 (1995) Vol 18 No 1 (1995) Vol 17 No 1 (1994) Vol 16 No 1 (1993) Vol 15 No 1 (1992) Vol 14 No 2 (1991) Vol 14 No 1 (1991) Vol 13 No 1 (1990) Vol 12 No 1 (1989) Vol 11 No 1 (1988) Vol 10 No 3 (1987) Vol 10 No 2 (1987) Vol 10 No 1 (1987) Vol 9 No 1 (1986) Vol 8 No 2 (1985) Vol 8 No 1 (1985) Vol 7 No 2 (1984) Vol 7 No 1 (1984) Vol 6 No 1 (1983) Vol 5 No 2 (1982) Vol 5 No 1 (1982) More Issue