Browsing by Author "Saleh, A.S."
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Item Application of high resolution aeromagnetic data for determination of depth to magnetic sources using source parameter imaging in Niger State, Nigeria(Scientific Publishing House, 2025) Sunday, I. O.; Osisanya, W.O.; Saleh, A.S.; Eyankware, M.O.; Chukwusa, F.O.Source Parameter Imaging (SPI) is a pivotal geophysical technique, particularly in aeromagnetism, for delineating subsurface geological structures through the analysis of magnetic anomalies. This study applies SPI to high-resolution aeromagnetic data over Baro and its surrounding areas in Niger State, Nigeria, to estimate the depth to magnetic sources. The research emphasizes the characterization of magnetic sources in terms of depth, geometry, dip, and susceptibility contrast. Data processing techniques, including regional field removal, residual anomaly mapping, and reduction to the magnetic equator, were employed to enhance data accuracy and interpretability. The findings reveal significant variations in sedimentary thickness, suggesting potential hydrocarbon reservoirs, particularly in the northern region, characterized by deeper basins. This study underscores the necessity of further exploration, integrating advanced seismic studies and drilling, to assess the hydrocarbon potential accurately. The SPI-derived insights provide a valuable framework for strategic hydrocarbon exploration in Nigeria's interior basins, contributing to the nation's energy security and economic growth.Item Critical Evaluation of Crude Oil and Sediments from Selected Areas of the Niger Delta.(International Journal of Earth Sciences Knowledge and Applications, 2026-08-03) Onoriode, D.A.; Ibe, K. A.; Osisanya, W.O.; Saleh, A.S.Understanding the occurrence, composition, and distribution of aliphatic hydrocarbons (AHCs) is crucial for assessing anthropogenic contributions and identifying the sources of AHCs in the environment. Therefore, this study focused on analyzing the concentrations, distribution patterns, and compositional characteristics of AHCs present in crude oil and sediments from the Udu, Ethiope East, and Ughelli North Local Government Areas. A total of nine crude oil samples and ten sediment samples were gathered from the research area. The concentrations of AHCs in these samples were quantified using gas chromatography with a Flame Ionization Detector (GC-FID) following extraction with a hexane/dichloromethane mixture and subsequent purification using a silica gel/alumina packed column. Analysis of the molecular indices indicated that the AHCs present in the sediments originated from marine biogenic, terrestrial biogenic, and petrogenic sources, whereas the hydrocarbons in the crude oil were derived exclusively from marine and terrestrial biogenic sources.Item Geochemical Assessment of Bottom Sediments of Water Bodies at Crude Oil Exploration Station in Delta State, Nigeria.(Discovery Nature, 2025) Abolodje, O.D.; Ibe, K.A.; Osisanya, W.O.; Ibitoye, T.A.; Saleh, A.S.Understanding the occurrence, composition, and distribution patterns of aliphatic hydrocarbons (AHCs) are crucial signals for identifying the anthropogenic contributions and sources of AHCs present in the environment. Therefore, this study focused on analyzing the concentrations, distribution pattern, compositional patterns, and sources of AHCs found in crude oil and sediments collected from the Udu, Ethiope East, and Ughelli North Local Government Areas. A total of nine (09) crude oil samples and ten (10) sediment samples were obtained from the designated study area. The analysis of AHC concentrations in these identification was performed by gas chromatography with Flame Ionization Detector (GC-FID) using hexane/dichloromethane mixture and further purification in a column filled with silica gel and alumina. The AHC in the crude oil samples were observed to be between 450 and 43657 mg/kg, with an average of 2859.11+7884.68mg/kg. The sediment samples on the other hand contained concentrations of AHC that varied between 10.8 and 470mg/kg with a mean concentration of 102.74 +2.85 mg/kg. The UNEP guideline limit of AHCs in sediments is 10 mg/kg, yet they were greater than those. The AHCs of the crude in the Ethiope East Local Government Area were detected to be 3071 +53.3mg/kg. Udu Local Government Area on the other hand reported concentrations of 14999 +/-314.3 and 155027 +/-291.7mg/kg. AHCs of the Ughelli North Local Government Area were 1149±69.7, 21686±3352.8, 14099±147.7, 450±17.3, 1114±19.6, and 43657±2185.3 mg/kg. Regarding sediment, the AHCs recorded were 12.7±0.3 and 18.8±0.6 mg/kg for Ethiope East Local Government Area, while Udu Local Government Area presents recorded values of 17. The results of the ANOVA reveal a significant difference (p<0.05) in the levels of AHCs found in both crude oil and sediment samples. Furthermore, the regression analysis indicates a minimal or nonexistent correlation between AHC concentrations in crude oil and those in sediment. Notably, the predominant hydrocarbons (MH) identified in the samples of crude oil and sediment were characterized by even carbon numbers, including C8, C16, C18, C32, C34, C36, and C38.Item Hydrogeochemical Characterization and Quality Assessment of Groundwater Based on Water Quality Index in Imo state, South Eastern Nigeria(World Bank / Department of Pure and Industrial Chemistry, University of Port Harcourt, 2022-12) Osisanya, W.O.; Agho, I.F.; Saleh, A.S.; Thompson, E.Water Quality Index (WQI), Principal Component Analysis (PCA), Correlation matrix, Metal Pollution Index (MPI), Contamination Factor (CF), Pollution Load Index (PLI), Geoaccumulation Index (Igeo), Health Risk Assessment, and Hydrogeochemical facies were used to analyze statistical indexes and hydrogeochemical facies in groundwater resources in Imo state, Nigeria. All across the study area, twenty (20) groundwater samples were collected in a systematic manner. The samples were examined in accordance with the American Public Health Association standard (APHA) method. Findings from the study revealed that WQI, is of poor quality and should only be used for irrigation. Weathering and redox reactions are important in groundwater geochemistry, according to PCA results. TDS and Cl, HCO3 and Zn, Cl; Mg and Ca, Ca and Na were all found to have a positive correlation in the correlation matrix while PH and K, HCO3 and Fe, Cl and SO4 are found to have a negative correlation in the correlation matrix. The findings show that the items have a weak correlation and that there is no relationship between the two variables. Further MPI, CF, and PLI findings revealed that groundwater is pure, the main source of pollution is geological and anthropogenic processes, and there is no pollution in sampled groundwater. Hydrogeochemical trend revealed that groundwater is Na++K+ > HCO3¯+CO3> Mg+ > SO4> Cl¯ > Ca+. Based on the finding, pre-use treatment of water resources is strongly advised.Item Identification of potential and aquifer vulnerability in basement terrain of southern Nigeria, using geophysical approach(Scientific Publishing House, 2022-10-20) Durotoye, A.A.; Osisanya, W.O.; Saleh, A.S.; Maruff, A.B.This research study used a vertical electrical sounding approach to investigate the transmissibility size of the hydrogeologic units under inquiry. This was brought on by failed water scheme initiatives and rapid population growth. Aquifer resistivity and thickness values were utilized to generate the hydraulic parameters that were used to describe the transmissibility magnitude.The Schlumberger design was used to conduct 16 VES surveys for the investigation, with a maximum electrode spacing of 200 m. The Dar-Zarrouk parameters longitudinal conductance (S), transverse resistance (T), longitudinal resistance (L), average transverse resistance (t), coefficient of anisotropy (λa), transmissivity (T), and hydraulic conductivity (H) were used to evaluate the aquifer's protective capability. Results from VES data indicated that the layer model ranges from three to six layers, and it was found that curve A was the most common type of curve. Results from the study revealed that S, Tr, ρL, ρt, λa, T, and H ranges from 0.02 to 0.18 Ω−1 , 761.7 to 31336.1 Ω /m2, 287.8 to 12314.4, 101.7 to 767.7, 0.15 to 0.69, 0.000003 at VES/12 to 0.0538 m/day, and 0.05 to 65.56 m2/day respectively. Deduction from the study revealed that northwest, and northeast parts of the study area tends to be more aquiferous when compared to other parts of the study area.Item IDENTIFYING PROSPECTS IN THE "HONYX" FIELD IN NIGER DELTA REGION USING SEISMIC ATTRIBUTES(Zibeline International Publishing, 2024) Adegoke, H.B.; Osisanya, W.O.; Saleh, A.S.; Eyankware, M.O.; Ojo, G.F.In the "HONYX" Field, Niger Delta, Gulf of Guinea, seismic attributes were employed to analyze the structural trend and identify regions that are favorable for hydrocarbon accumulation. Nestled in the Niger Delta basin, the 'HONYX' field spans approximately 75,000 km² and is situated between latitudes 4°N and 6°N and longitudes 3ºE and 9°E. One of the petroleum companies in Nigeria provided the data set, which included the Base map of the study region, well logs (LAS format), 3-D seismic data (SEG-Y), and Check shot survey used for this work. Faults picking, horizon mapping, and structural map production were the techniques employed to accomplish this goal. The DHIs (Sweetness and Instantaneous frequency), RMS Amplitude, and Variance were the seismic properties that were employed. In the research area, the Sweetness exhibits a strong amplitude in regions where there are isolated sand bodies surrounded by shale. On the Sweetness time slices, they appeared as brownish patches. From the seismic data, the instantaneous frequency parameter was also produced. On the sweetness time slice, however, the zone or zones with strong amplitude match the instantaneous frequency, which displays low frequency anomalies suggestive of cracked and hydrocarbon zones. The Variance Trends Analysis showed the two main faults in an east-west orientation. Following that, structural maps of depth and time were created for three defined horizons. Finally, this study demonstrated that the application of seismic attribute analysis has uncovered several hydrocarbon prospective zones that could be further revalidated and evaluated to a hydrocarbon prospect, away from the producing zone (which is common to all three reservoir tops). These prospect areas were identified on the three depth maps. The "HONYX" Field is effective for accumulating hydrocarbons, according to the observed data.Item Integrated Geophysical and Geochemical Exploration for Gold Mineralization: A Case Study in Lokoja Sheet 247, Ajaokuta L.G.A, Kogi State, Nigeria(University of Port Harcourt, 2024-06-09) Osisanya, W.O.; Shaibu, O.B.; Korode, A.I.; Saleh, A.S.This paper presents an integrated geophysical and geochemical data exploration for assessing the Potential presence of gold in Lokoja Sheet 247, Ajaokuta L.G.A of Kogi State, Nigeria by using interpretation of varying derivatives to delineate structural features, with a specific focus on the NE – SW direction, aligning with the regional trend. Additionally, x-ray fluorescence analysis was employed to examine samples from the study area. The interpreted aeromagnetic data unveiled a high anomalous area, prompting further geochemical investigation. X-ray fluorescence analysis indicated gold concentrations ranging up to five parts per million in certain samples, signifying potential high-grade gold mineralization in the study area. Based on the integrated geophysical and geochemical findings, it is recommended that more detailed exploration efforts be concentrated in the eastern half and northwestern portion of the study area. Notably, this research utilized x-ray fluorescence analysis, which proved effective at this stage; however, for more robust information, future exploration endeavors should incorporate advanced geochemical analyses. Moreover, follow-up ground geophysical surveys, including Induced Polarization, ground magnetic, and electromagnetic methods, are deemed necessary.Item Petrophysics and Well Log Correlation of “FTP” Field Offshore Niger Delta(Stephy Publishers, 2025-06-17) Fashipe, P.T.; Osisanya, W.O.; Korode, A.I.; Saleh, A.S.One challenging thing about doing formation evaluation studies in clastic formation like the Niger Delta is accurately identifying and mapping the reservoir sands and their edges. This is also true when studying the offshore Niger Delta. The database comprised borehole logs from four wells. Gamma ray logs were used to map the lithology while thye hydrocarbon bearing reservoirs were identified with a mix of gamma ray and resistivity logs. Well-logged correlation was carried out using similarity in log signatures. Schlumberger software (PETRELTTM) was used for interpretation. The computation of petrophysical parameters such as net-to-gross volume, volume of shale, porosity, permeability, and hydrocarbon saturation was done using standard equations. The general lithology in the area is an alternation of sands and shales. Three reservoirs designated as R1, R2, and R3 extend across all the wells. Reservoir R1 is located at a depth of 8244 m in well 1, 8202 m in well 2, 8167 m in well 3, and 8129 m in well 4. Reservoir R2 is located at a depth of 8843 m in Well 1, 8520 m in Well 2, 8478 m in Well 3, and 8448 m in Well 4. Likewise, reservoir R3 is located at a depth of 9508 m in well 1, 8801 m in well 2, 8758 m in well 3, and 8730 m in well 4. Reservoir R1 has an average net-to-gross sand of 0.98, a volume of shale of 0.15, porosity of 0.34, and permeability of 1010 mD. Reservoir R2 has an average net-to-gross sand of 0.92. The shale volume is 0.19, the porosity is 30%, and the permeability is 838 mD. Reservoir R3 has an average net-to-gross sand of 0.92. The shale volume is 0.01, the porosity is 0.30, and the permeability is 783 mD. The reservoir parameters were also represented statistically using a bar chart. These representations gave insight into the distribution of the reservoir parameters of interest in the study location.Item Volumetric characteristics and mineralogy of Ogwashi Asaba Formation, Niger Delta Basin Nigeria(European Centre for Research Training and Development UK, 2026-09-15) Obiakonwa, I.E.; Odumoso, S.E.; Osisanya, O.W.; Saleh, A.S.; Ogheneochuko, E.R.The aim of this study is to examine the Ogwashi-Asaba Formation 's mineralogv and volumetric characteristics. During the fieldwork, a variety of well-preserved geological samples were collected from several locations within 'he research region. Standard laboratory and analytical procedures were used to the gathered samples. The sediments are mediunl to coarse grained, poorly sorted, almost symmetrical in terms of skewness, and leptokurtic in terms of kurtosis, according to the results of the various analyses.These characteristics typically indicate sediments from continental and/or mixed environments (transitional). Additionally, the petrographic examination reveals quart: to be the predominant mineral, making up over 85% of the entire mineralogy, suggesting a basement rock as the source. Other heavy minerals were also found, including sillimanite, zircon, and tourmaline. Overall, the study sheds more light on the lithologv, different minerals, and depositional environment Additionally, the study will help with the development and exploitation of natural resources, especially possible hydrocarbon deposits, and advance knowledge of the geologv of the Niger Della Basin.