Forum Teknik

Pengaruh Tonstein terhadap Karakteristik Geokimia Batubara Lapangan Banko, PT Bukit Asam Tbk, Tanjung Enim, Sumatra Selatan

Angga Aditya Putra Tanjung — 2025-11-22

Indonesia has abundant fossil energy resources, especially coal, which has long been the backbone of national energy supply. However, the government is committed to shifting from fossil fuels to renewable energy. This shift contrasts with the country's vast coal reserves, requiring innovations to enhance coal's value, particularly in the Muara Enim Formation at the Banko Field, owned by PT Bukit Asam Tbk. This area is ideal for studying coal's geochemical properties due to tonstein layers, which enrich trace elements in coal. This study analyzes tonstein's influence on coal's geochemical traits and evaluates valuable and toxic elements. Multivariate statistical methods, including Principal Components Analysis (PCA) and Hierarchical Clustering Analysis (HCA), were used via Python programming. Results show tonstein affects moisture in seams A1 and B1, associated with oxygen, SiO2, Al2O3, P2O5, TiO2, Cu, and Mn. It also impacts ash in seams B2 and C, linked to sulfur, V, Co, Zn, As, Pb, and Sr. Seams D and E are more influenced by fixed carbon. Boron (B), abundant in seams D and E, is a valuable element tied to coal with high fixed carbon or calorific value. Conversely, Zinc (Zn), found mainly in seam C, is a toxic element associated with high ash and sulfur levels.

Rekomendasi Pemanfaatan Pasir Kuarsa Desa Latsari, Kecamatan Bancar, Kabupaten Tuban, Jawa Timur Berdasarkan Karakteristiknya

Angelia Verdianti Rizky Gunawan — 2025-11-22

Quartz sand is an industrial mineral in high demand. Indonesia must maximize this opportunity, as the potential of silica sand is vast, particularly in Latsari Village, Bancar District, Tuban Regency, East Java. Analyzing the characteristics of quartz sand is crucial to determine its potential uses. In this study, six quartz sand samples were collected and analyzed for grain morphology, size distribution, and geochemical composition to evaluate their characteristics and suitability be used according to standard specifications. The quartz sand’s average grain size is classified as medium sand (0.25-0.5 mm) and has a subangular shape, which means nearby its source rock. Geochemically, quartz sand in research area consists mostly of silica oxides (63.37%-92.09%) and smaller amounts of iron oxides (1.02% - 10.74%), and aluminium oxides (4.67% - 25.47%), which negatively correlate with silica content. Based on its silica and oxide content, the use of quartz sand in the research area is recommended for producing refractory bricks for the casting industry with notes sample need purification process to remove impurities and increase silica content.

Mengidentifikasi Potensi Kesekatan Sesar Menggunakan Metode Shale Gouge Ratio pada Sumur “X” Formasi Challis di Cekungan Bonaparte Indonesia

Tegar Narendra Angger Bagaskara — 2025-11-22

The Bonaparte Basin is a Paleozoic-aged basin located between northwestern Australia and Timor Island. Stratigraphically, this basin consists of Upper Permian to Pliocene-aged rocks, with dominant lithologies including claystone, siltstone, sandstone, and limestone. Given this stratigraphic composition, the Bonaparte Basin has the potential for a petroleum system that can be explored, particularly in the Upper Triassic interval. The Challis Formation, composed of sandstone interbedded with claystone, can serve as a reservoir within the petroleum system. In addition to a good reservoir, the highly active tectonic conditions during the formation of the Bonaparte Basin led to the development of faults, which influence whether hydrocarbons can be sealed or if leakage occurs in a reservoir. Therefore, a fault seal analysis was conducted to determine whether the faults within the Challis Formation interval can effectively seal hydrocarbons or if leakage is present. This analysis was performed using the Shale Gouge Ratio (SGR) method on seven reservoirs, revealing that the faults within the Challis Formation interval can serve as effective hydrocarbon accumulation sites or be fully sealing at a throw of 440.2 meters

Penentuan Tipe Batuan Reservoar Pada Formasi Hutton, Lapangan Jackson, Cekungan Eromanga, Queensland, Northeastern Australia

Yusril Fachrizal Ahnan Tu’adun — 2025-11-22

Queensland, Northeastern Australia is known as oil and gas productions spread across several major basins, namely 51% in the Eromanga-Cooper Basin, 46% in the Bowen-Surat Basin, and 3% in the Galilee Basin. This research is focused on the Hutton Formation, Jackson Field, located in the Eromanga Basin. The determination of petrophysical rock type (PRT) and its distribution is carried out with the aim of obtaining an overview of reservoir heterogeneity in the form of Petrophysical Rock Type (PRT) and poro-perm transform equations for each PRT. The data that used are well logs from Jackson 1, 3, and 4) and well report data from Jackson 1 (RCAL). PRT analysis was performed on the core interval using the Hydraulic Flow Unit method then used in other intervals and wells that did not have cores. After all intervals could be defined by their PRT, then the poro-perm transform from the core was applied to obtain a model of vertically well permeability. The results of the analysis show that the study area is composed of three PRTs based on its parameters which are grain size, effective porosity limit values and the main one is the shale volume value. The resulting poro-perm transform is in the form of a three-power regression with the main input being effective porosity. PRT 3 is the best reservoir with a permeability value of >350mD. The vertical and lateral distribution model of permeability shows that reservoir body can consist of several types of PRT, most of that can be correlated.

Smart Filter Industri Pengolahan Sampah AETHER Ekstrak Jatropha multifida Linn Terimpregnasi Adsorben Alami Berbasis Internet of Things dan Artificial Intelligence

Edi Mustofa Yulianto — 2025-11-22

Air pollution from industrial emissions has a negative impact on health and the environment in Indonesia. For this reason, an affordable and effective technology is needed to reduce industrial pollution and emissions, especially the waste treatment industry. The solution offered is a prototype of AETHER, an industrial smart filter that uses natural ingredients from the Jatropha multifida Linn plant extract which is easy to obtain and easy to grow in Indonesian climatic conditions. The extract of this plant is impregnated in zeolite and activated charcoal as adsorbents. IoT and AI technologies are used to monitor and control pollution in real-time. And filter maintenance predictions. This prototype has been proven to be effective in reducing emissions of harmful pollutants such as CO, SO2, and NO2 with filtration rates reaching 94-96% for CO, 57-60% for SO2, and 40-48% for NO2. Based on this, the AETHER prototype has the potential to be applied as a filter in industries in Indonesia to reduce air pollution from industrial emissions.

Hubungan Petrophysical Rock Typing dan Tekstur Sedimen Pada Zona Prospek Reservoir Formasi Talang Akar, Subcekungan Palembang Selatan, Cekungan Sumatera Selatan

Elfina Damayanthi Harahap1 — 2025-11-22

The research area is in the South Palembang Subbasin, South Sumatra Basin is a petroleum producing area in Indonesia which is the working area of PT. Pertamina EP and Talang Akar Formation as the reservoir. This research aims to determine petrophysical parameters of reservoir and determine relationship between petrophysical rock typing and sedimentary texture in the reservoir prospect zone. The data used in this research are well logs data and well reports which contain temperature, RCAL, and XRD data. The data used to determine lithology are gamma ray logs and shale volume calculations use a linear method using gamma ray logs. Total and effective porosity data are calculated using density logs. Water saturation is calculated using the Simandoux method. The permeability value is determined using the porosity-permeability transform method. Rock typing was carried out using a hydraulic flow unit and Winland R35 method. Both methods use effective porosity and core permeability data. The values that have been obtained are cross plotted with shale volume and effective porosity to obtain rock type values. The hydraulic flow unit method produces 5 rock types, while the Winland R35 method produces 3 rock types. The reservoir potential zone has a shale volume value ≤ 0.3V/V, effective porosity ≥ 0.15V/V and water saturation ≥ 0.75V/V. Good petrophysical rock typing has a sediment texture in the form of fine sandstone and coarse sandstone grain sizes, good sorting, contact between grains in the form of points which causes the rock to have good porosity and permeability.

REWS-GAMA (Radiation Early Warning System) : Modul EWS dengan Sistem Evakuasi Cerdas berbasis Algoritma Dijkstra-Modifikasi untuk Mendukung Sistem Proteksi Fisik

Jalalludin Mukhtafi — 2025-11-22

In the past few years, nuclear security advancements have been aggressively pursued. In addition to Indonesia's efforts with the establishment of the Hypothetical Nuclear Safety Facility (HNPRF), nuclear global organizations such as the IAEA and ICRP have been actively evaluating evacuation safety using current technology. One of these technological implementations is the REWS module, which has been adopted by many countries, including Lebanon. However, conventional REWS tends to rely on manual procedures, requiring experts to conduct separate analysis and validation, which cannot be performed in real-time. This study aims to develop an AIoT-integrated REWS module to enhance evacuation route response and predictive radiation systems. This research consists of two assessments: a hypothetical study (conducted at the HNPRF) and a pilot study (conducted on the 2nd floor at DTNTF). The proposed solution architecture includes two conditions—“normal” and “hazardous”—by inserting a reference location or initial worker position along with the final evacuation destination. This system provides an evacuation route using a modified Dijkstra algorithm (without weight). Finally, the data visualization is transmitted to Pekerja Proteksi Radiasi (PPR) and local workers, allowing them to follow the recommended evacuation path. The pilot simulation results indicate the most effective exit route, leading to the nearest evacuation point, with an accumulated dose of 1.355 × 10⁻³ μSv, a travel distance of 19.49 meters, and an evacuation time of 8.77 seconds when running. The hypothetical simulation at HNPRF involved two start-point scenarios. In the first scenario (start point-1: front door), the optimal route to end point-1 had an accumulated dose of 4.853 × 10⁻³ μSv, a travel distance of 66.38 meters, and an evacuation time of 29.8 seconds while running. Meanwhile, in the second scenario (start point-2: emergency door), the best route led to end-point-3 (emergency gate), with an accumulated dose of 1.236 × 10⁻² μSv, a travel distance of 161.21 meters, and an evacuation time of 72.55 seconds while running.

Desain dan Implementasi Platform Pembelajaran Geografi Kebencanaan Terintegrasi Augmented Reality dan Chatbot Menggunakan Metode ADDIE

Syahrial Syarif Amri — 2025-11-22

The 2023 World Risk Report (WRR) ranks Indonesia second in disaster risk with a score of 43.5%. This highlights the need for educational institutions to play a greater role in disaster education and mitigation. However, geography education at the high school level remains ineffective due to its theoretical approach, lack of engaging media, teacher competency issues, and poor material selection. This study introduces an interactive learning platform integrating augmented reality, chatbots, interactive maps, and audio explanations to enhance student understanding through audiovisual methods. The platform was developed using the ADDIE methodology (Analysis, Design, Development, Implementation, and Evaluation), then tested at SMAN 1 Jetis, yielding an SUS score of 76 and high UAT ratings: media (84.75%), services (84.25%), and efficiency (83.84%). The results indicate that the platform is an effective and user-friendly educational tool for disaster geography, with positive feedback from educators further supporting its potential.

Potensi Pencemaran Bahan Bakar Minyak (BBM) terhadap Air Tanah Daerah Pleret, Bantul (Studi Kasus SPBU 44.557.01 Yogyakarta)

Athallah Bayu Saputro — 2025-11-22

Groundwater is an important aspect that is widely used in life. One source of groundwater pollution in the community is the leakage of underground storage tanks or fuel oil pipelines. This study aims to determine the zoning of potential groundwater pollution by fuel in the area around gas station 44.557.01 Yogyakarta. The research method used is the LeGrand method which is specifically used for pollution assuming the source of pollution comes from one point. This method considers five physical environmental factors, namely the depth of the groundwater table, absorption capacity in the unsaturated zone, aquifer permeability, slope of the groundwater table, and horizontal distance to the gas station. Determination of groundwater pollution potential is based on the total score of the five factors by considering the direction of groundwater flow. The results showed that fuel pollution to groundwater in the area around Gas Station 44.557.01 Yogyakarta can be classified into 3 categories: low (79% area), medium (8% area), and high (13% area).