GeoScience Engineering. 2025, vol. 71
Permanent URI for this collectionhttp://hdl.handle.net/10084/158013
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Item type: Item , Enhanced Reservoir Characterization of Phem Field, Offshore Niger Delta: Integration of Seismic Attributes and Reservoir Property Modeling(Vysoká škola báňská-Technická Univerzita Ostrava, 2025) Salami, Rotimi; Adepetun, Adeolu OluwafemiThis study provides a comprehensive characterization of hydrocarbon-bearing reservoirs in the Phem Field, offshore Niger Delta, integrating well logs, seismic attributes, and petrophysical modeling for enhanced exploration and production. Three key reservoirs (R-1, R-2, and R-3) were identified within the Agbada Formation, exhibiting intercalated sand and shale layers with variable thickness and significant hydrocarbon potential. Well log analyses based on gamma ray (GR), resistivity, and neutron-density (N-D) logs revealed increasing shale content with depth, aligning with the stratigraphy of the Agbada Formation. Time and depth structure maps highlighted key structural features and hydrocarbon trapping mechanisms, supported by fault-controlled anticlinal structures. Seismic attribute analysis, particularly RMS amplitude and average envelope, delineated high-amplitude zones correlating with high- porosity sands and favorable reservoir facies, providing strategic targets for exploration. Petrophysical modeling, including net-to-gross (NTG), porosity, and permeability models, confirmed superior reservoir quality in specific zones, with NTG values reaching 95% and porosity ranging from 0.12 to 0.42. Additionally, water and hydrocarbon saturation models underscored zones with strong hydrocarbon presence and minimal water content, marking promising areas for efficient hydrocarbon recovery. These integrated findings highlight the Phem Field's robust hydrocarbon potential, offering valuable insights for optimized reservoir management and future development.Item type: Item , Geophysical and Geotechnical Investigation, and Lime Stabilizing Effect on Subgrade Failure Around a Section of Lagos-Abeokuta Highway(Vysoká škola báňská-Technická Univerzita Ostrava, 2025) Ojekunle, Olurotimi Victor; Omitogun, Solomon; Oloruntola, Moroof O.An electrical resistivity survey and geotechnical investigations were employed to examine the factors responsible for incessant roadway failure along sections of the Lagos-Abeokuta highway in Southwestern Nigeria. A study on the efficacy of lime as a stabilizing agent on failed subgrade soil was also conducted. Electrical resistivity imaging and laboratory geotechnical tests with the aid of grain size analysis, Atterberg’s limits, the standard proctor compaction test, the CBR (unsoaked and soaked), and the compression test (UCS) were carried out for this study. The 2D resistivity images reveal incompetent subgrade layers with resistivity values ranging between 12– 88.3 Ω.m, and values ranging between 21.5 and 127.3 Ω.m at a depth of approximately 2 m for the VES investigation. The laboratory geotechnical tests’ results along the failed segments also reveal poor subgrade soils which are composed of clay, clayey sand, and sandy clay; with plasticity indices ranging between 29.4 and 31.5, and average values of 74.5 KN/m2 and 1.69 g/cm3 for the UCS and maximum density, respectively. However, with lime admixture to the soil samples in 2%, 4%, 6%, 8%, and 10% proportions, there was a progressive improvement in the shear strength of the clayey soil samples, owing to the reduction in the plasticity and increase in the MDD and UCS.Item type: Item , Necessity of Landfilling - Impact on the Environment Today(Vysoká škola báňská - Technická univerzita Ostrava, 2025) Vaľo, Andrej; Jurík, Norbert; Lapčík, Martin; Lapčík, VladimírThe future of waste disposal, which represents a major ecological and environmental problem in Europe and its individual countries, is still not solved in any effective way. Landfilling is directly related to the waste management programs of individual countries of the European Union, which mainly strive to mitigate the impact of waste on the environment. Improper handling of waste poses a threat to all components of the environment, therefore proper handling and subsequent processing is essentiaItem type: Item , Environmental Impacts of Warehouse Complexes: Analysis of Their Influence on Landscape and the Environment(Vysoká škola báňská - Technická univerzita Ostrava, 2025) Jurík, Norbert; Vaľo, Andrej; Lapčík, Martin; Lapčík, VladimírThis article analyses the environmental impacts arising from the construction and operation of warehouse complexes and their effects on the landscape and the environment. Warehouse complexes are a key component of the logistics chain in modern industry, but their construction and operation can significantly negatively affect the surrounding environment. The article examines various aspects of these impacts, including land occupation, changes in landscape, emissions, and waste management. It discusses options for prevention, elimination, and compensation of negative effects, as well as current legislative and methodological approaches to assessing the environmental impact of warehouse complexes. The aim of the article is to provide a comprehensive view of the issue and identify potential measures to mitigate the environmental impacts of warehouse complexes.Item type: Item , Numerical Simulation of Added Mass Force and Pressure Gradient Force to Predict the Deposition Process of Particles and the Distribution of Water Velocities in Sewerage Pipelines(Vysoká škola báňská - Technická univerzita Ostrava, 2025) Merrouchi, Farida; Fourar, Ali; Massouh, Fawaz; Lakhdari, Somia; Zeroual, AbdelatifThe dispersion and deposition of solid particles in turbulent flows within sewer networks were numerically analyzed. Given the high density ratio between solid particles and water (greater than 0.1), observed in the semi-arid regions of Algeria, the added mass forces and pressure gradient were integrated into the particle motion equation. A coupled Euler-Lagrange approach, based on the 𝑘-𝜔-𝑆𝑆𝑇 turbulence model and the Discrete Random Walk (DRW) model, was used to simulate fluid flow and particle transport, as well as their interaction with turbulence. The pressure gradients from the numerical simulations of turbulent flow were compared with experimental data from the Dyn- Fluid laboratory at ENSAM Paris, showing excellent agreement. The simulations revealed that pressure drop increases with particle size and higher flow velocities. They also showed that particle deposition rates correspond to known deposition zones in sewer networks, and that an increase in water velocity reduces particle deposition, in line with scientific literature.