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Journal of Geoscience, Engineering, Environment, and Technology
Published by Universitas Islam Riau
ISSN : 2503216X     EISSN : 25415794     DOI : 10.25299
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Engineering Environmental Science Physics
JGEET (Journal of Geoscience, Engineering, Environment and Technology) published the original research papers or reviews about the earth and planetary science, engineering, environment, and development of Technology related to geoscience. The objective of this journal is to disseminate the results of research and scientific studies which contribute to the understanding, development theories, and concepts of science and its application to the earth science or geoscience field. Terms of publishing the manuscript were never published or not being filed in other journals, manuscripts originating from local and International. JGEET (Journal of Geoscience, Engineering, Environment and Technology) managed by the Department of Geological Engineering, Faculty of Engineering, Universitas Islam Riau.
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Articles 595 Documents
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Estimation of Aspect Ratio Values in Carbonate Rocks Using the Kuster–Toksöz Model for Reservoir Characterization Hasanah, Uswatun; Winardhi, Ignatius Sonny
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24354

Abstract

Carbonate reservoirs are known for their complex pore structures, which significantly affect their elastic properties and, consequently, their fluid storage and flow capacities. Traditional models often fail to capture the heterogeneous pore geometries in carbonate rocks accurately. The Kuster-Toksöz model offers a means to estimate effective elastic moduli by incorporating pore aspect ratios, providing a more nuanced understanding of pore shapes and distributions The combination of Kuster Toksӧz inclusion model for pore shape of penny cracks produces velocity model which is then compared with the measurement results. The results show a good match at 2800 m - 3000 m intervals with a single aspect ratio of 0.05. The difference in the aspect ratio of each depth is related to the compacting process of rock formation due to increased depth, which shows that the deeper the depth the rock pore will be stiffer.
Inversion Geochemistry as a Method for Interpreting Source Rock Criteria of Oil Samples: A Case Study from the Bobonaro Area, Maliana Basin, Timor-Leste Pires, Joanico; Subroto, Eddy Ariyono; Kesumajana, Asep Heri Patria
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24362

Abstract

In general condition, crude oil samples are difficult to obtain. However, when the crude oil samples are obtained, researchers will be able to estimate the possibility of their source rock, as long as the samples are analyzed in sufficient detail. In this study, the samples used as case studies are the Pualaka and Suai Loro oil seepage samples from Bobonaro area, Maliana Basin, Timor Leste. The petroleum samples obtained happened to be in relatively fresh condition. The analysis carried out included analysis using GC and GC-MS with the objects of analysis being biomarkers, i.e. triterpane compounds with m/z 191 and steranes with m/z 217. The results obtained showed that the two seepage oils were suspected to belong to one oil family whose source rock was estimated to be deposited in a marginal marine area with a dominant algae supply and few higher plants with Pre-Tertiary geological age. The maturity of the two petroleum samples was relatively high, at the stage of peak oil generation. By knowing such characters, researchers will be able to predict sedimentary rocks in the basin area that are of the same type as petroleum characters using inversion geochemistry technique. The most possible source rock of the crude oils is the Babulu Formation.
Integrated Analysis of Seismic and Well Data to Determine CO₂ Injection Zones in “W” Field of The Talang Akar Formation, Asri Basin Ardiansyah, Muhammad Feri Edo; Lubis, Muhammad Husni Mubarak
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24363

Abstract

Asri Basin is one of the most prospective areas to store CO₂ in a CCS project in Indonesia. Previously, Asri basin was one of the most prolific oil and gas provinces in the region. This study characterizes the CO₂ injection zone in the saline aquifer reservoir by analyzing seal, storage, and injectivity. A model-based seismic inversion method was used to produce an acoustic impedance volume, which was then transformed into a porosity volume and a permeability volume. Also, analysis of seismic variance attributes was also carried out to investigate the presence of faults surrounding the seal.  The results indicated that the seal quality criteria in the study area are satisfactory because no faults intersect the seal. The average distribution of porosity values in the injection target zone is 32%, with the distribution of permeability values being more than 500 mD, making the area satisfactory for CO₂ injection.
Design of an Integrated Aircraft Fuel Ordering Based on Blockchain Technology at an International Airport Vikaliana, Resista; Rasyidiq, Fiqri
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24366

Abstract

This study focuses on DPPU SHIPS. DPPU SHIPS is a subsidiary of PT Pertamina, which is a subsidiary of Pertamina that plays a role in the distribution and sale of aircraft fuel at Soekarno Hatta International Airport. Since 2020, Pertamina has been committed to digitizing all lines of business for efficiency. Therefore, the Digital Ground Operation (DGO) system was implemented, which combines the main business processes into one digital platform. In its implementation, weaknesses were found due to the absence of an integrated ordering system without intermediaries between airlines and Pertamina, resulting in a line of work that was prone to human error. This research aims to recommend an integrated service model for aircraft fuel distribution using blockchain technology. The booking system model is designed to ensure transparency of booking data and secure and valid receipt between airlines and Pertamina. Blockchain technology was chosen because it can guarantee transparency of orders, traceability, and the capacity to share information about the aircraft fuel distribution process.   Thus, the aviation fuel supply chain can be more reliable.  Furthermore, this technology can reduce human error in every transaction. The application of blockchain can revolutionize the way the supply chain works. This research consists of three stages: identifying the business processes of aviation fuel sales, identifying the data needed and used in each process along with the actors involved, and then formulating a model or design. The results of this research describe the model design of how the aircraft fuel ordering system is integrated by applying blockchain technology.
4D Seismic Analysis of Hydrocarbon Reservoir at Hugin Formation, Volve Field, North Sea Agustin, Yasinta Farania; Lubis, Muhammad Husni Mubarak
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24368

Abstract

This study investigates the 4D seismic analysis of oil-filled hydrocarbon reservoirs in the Volve Field. A primary objective is to model reservoir changes resulting from water injection activities using a time-lapse model-based inversion approach. The study employs Volve 3D seismic data from 2002 as a baseline and 2010 data as a monitor. Well logs used for the inversion include injection wells F-4 and F-5 and production well F-12. Inversion of the baseline and monitor seismic volumes reveals a distribution of acoustic impedance values ranging from 6770 to 12008 (m/s)*(g/cc). Time-lapse analysis, conducted by differencing the inverted baseline and monitor acoustic impedance volumes, reveals an average increase of approximately 2.74% in acoustic impedance in the vicinity of the injection and production wells. This increase is interpreted as a response to the migration of injected fluids into the reservoir. The spatial distribution of impedance changes suggests that the injected fluids preferentially migrate within the Middle Zone, rather than the Lower Hugin Zone. This behavior is likely controlled by the increased shale content in the Lower Hugin Zone, which acts as a permeability barrier and restricts downward fluid movement.
Sensitivity Test Analysis Using Reservoir Simulation on Surfactant-Polymer Injection with Core Modeling Jannoke, Ludovika; Syaifullah, Muhammad Rizal
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24407

Abstract

This research aims to determine the results in increasing the effective recovery factor carried out by doing core modeling to be carried out for application to the field. Prior to the research, EOR screening was conducted to maximize the results, and from the EOR screening results, the EOR method that can be used is surfactant-polymer injection. This research was conducted using laboratory data from open source to do data modeling such as core data and surfactant-polymer data. After obtaining laboratory data, perform core modeling using laboratory data that is matched against laboratory test data. After the coreflooding simulation results are obtained by matching and after optimization, the next step is to up-scale the data to the field to carry out the scenario. There are three initial scenarios, namely basecase, waterflooding, and surfactant-polymer injection. After that, sensitivity tests were carried out on the total PV injection from 0.1 PV to 0.2 PV. And the maximum result was obtained in the surfactant-polymer injection scenario with 0.18 PV injected. The recovery factor was 51.21% with a total cumulative oil production of 190.3 MMBBL. Determination of the best scenario is determined through an increase in recovery factor, besides that the time carried out in all scenarios is carried out for 40 years.
The Effect of Microsilica on Expanding Cement for Micro-Annulus Problem in Gas Migration Hamid, Muhammad Chairafy; Wardana, Raka Sudira; Pattinasarany, Adrian; Lian, Dan
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24440

Abstract

Gas migration through cement slurry and micro-annuli remains a major well integrity. Improper cementation can lead to micro-annulus formation, enabling gas leakage and increasing blowout risk as downhole pressure decreases. Microsilica has been widely used as an anti-gas migration additive due to its ability to reduce permeability and improve cement stability; however, its effect on expanding cement systems has not been fully evaluated. This study investigates the influence of microsilica on the physical and mechanical properties of expanding cement slurry and its interaction with conventional expanding additives. Three slurry formulations—base slurry with microsilica, base slurry with expanding additive, and a combined microsilica–expanding additive system—were prepared and tested following API RP 10B procedures, including density, rheology, fluid loss, free water, thickening time, compressive strength, and expansion ring testing. Results show that microsilica provides beneficial effects by reducing fluid loss, eliminating free water, increasing compressive strength, and enhancing post-set expansion performance when combined with expanding additives. However, microsilica also increases slurry viscosity and shortens thickening time, potentially affecting pumpability and placement. Expansion ring tests indicate that the combined microsilica–expanding additive slurry exhibits the highest expansion (0.446% at 96 hours), whereas cement with microsilica alone shows initial shrinkage before gradual expansion. Overall, microsilica acts as a complementary additive that improves the performance of expanding cement but requires careful optimization to avoid negative impacts on rheology and setting behavior. The findings highlight the importance of additive balancing in designing cement systems for gas-migration-resistant well completions.
Analysis of Enhanced Oil Recovery Based on Well Patterns and Injection Volume Using the Continuous CO2 Injection Method Oktaviani, Ajeng Purna Putri; Silaban, Nanda Nicholas; Jannoke, Ludovika
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24443

Abstract

This study examines how the continuous CO2 injection method can improve oil recovery based on well patterns and injection volumes. The increase in oil recovery is observed using a number of well pattern scenarios, each with injection volume sensitivity. CMG-GEM is the software used in this study to simulate the different scenarios. A homogeneous reservoir model, grid data, reservoir fluid data, and reservoir data are among the data needed for this study. Four-spot, five-spot, nine-spot well patterns are taken into consideration in this research scenario. For each well pattern` the injection volumes that will subsequently be used as a reference for the injection rate at the injection well are one HCPV, five HCPV, ten HCPV, and twenty HCPV. According to the study’s findings, the inverted nine-spot well pattern with an injection volume of twenty HCPV scenario improves oil recovery more than the four-spot, five-spot and nine-spot well patterns.
Comprehensive Analysis of Latex Additives for Zonal Isolation and Gas Migration Control Pattinasarany, Adrian; Lian, Dan
Journal of Geoscience, Engineering, Environment, and Technology Special Issue from The 2nd International Conference on Upstream Energy Technology and Digitalization
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.1.24493

Abstract

This paper examines the performance of a latex additive in a 7-inch production casing cementing operation, focusing on its role in improving zonal isolation and preventing gas migration. The study uses data from, Cement Hydration Analyzer (CHA), Static Gel Strength Analyzer (SGSA), Cement Bond Logs (CBL), and Ultrasonic Imaging Tools (USIT) to assess the latex additive's impact on cement bond quality and integrity. Primary cementing practices are critical for ensuring well integrity and productivity. Latex additives strengthen the bond between casing and formations, improving zonal isolation and gas migration control. These additives enhance the mechanical properties of cement slurries, creating a resilient seal for hydrocarbon production demands. Advanced technologies like CHA and SGSA provide real-time monitoring of the cement hydration process, offering valuable views into mechanical property development and potential weaknesses in preventing fluid migration. The study shows how latex additives optimize hydrocarbon extraction, safeguard well integrity, and develop new methods to mitigate gas migration. It is concluded that using latex additives, combined with simulations to analyze displacement efficiency, flow potential, and critical static gel strength, enhances cementing operations and prevents gas migration. This approach may also lead to cost savings by potentially eliminating the need for ultrasonic logging in future latex jobs.
Paleoenvironmental Influences Evaluation on Sedimentary Organic Matter of the Kampungbaru Formation, Lower Kutai Basin: Organic and Inorganic Geochemical Approaches Jamaluddin; Jamaludin, Siti Nur Fathiyah; Massinai, Muhammad Altin; Zhang, Shiqi; Mansor, Hafzan Eva; Oscar, Agus Wiramsya
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 4 (2025): JGEET Vol 10 No 04 : December (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.4.24526

Abstract

The study of paleoenvironmental influences on sedimentary organic matter has become a critical field of research, particularly in understanding the depositional conditions that control the accumulation and preservation of organic matter. In present study, Upper Miocene-Pliocene Kampungbaru Formation of the Lower Kutai Basin, Indonesia was evaluated by utilizing geochemical proxies to interpret the role of paleoclimate, paleosalinity, and paleoredox conditions on the enrichment of sedimentary organic matter. The rock unit is mostly comprised of shale, coaly shale and coal. The sediments of the Kampungbaru Formation were mostly deposited in a freshwater to brackish depositional environment, likely representing swampy or deltaic settings with transitions between weakly anoxic to oxic environments. A fluctuation between humid and arid climates with higher total organic carbon (TOC) values associated with humid conditions that enhanced  the organic matter preservation. The geochemical results indicate that the analyzed samples have a TOC content between 1.50 wt.% to 43.68 wt.%, indicating a good to excellent organic matter content. Organic matter in the Kampungbaru Formation is composed of type III (gas-prone) and type II-III (mixed oil and gas prone) kerogen, with HI values ranging from 91 to 269 mg HC/g TOC. The pyrolysis Tmax of the Kampungbaru Formation range from 301 to 427 °C which indicate that sediments are thermally immature, bordering on the limit of 435ºC. The closure of the Indonesian Seaway during the Miocene-Pliocene restricted marine water exchange between the Indian and Pacific Oceans. This tectonic event likely reduced marine influence in the Lower Kutai Basin promoting freshwater-dominated depositional settings such as swamps and deltas.

Page 58 of 60 | Total Record : 595

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