Browsing by Author "Korode, A.I."

Now showing 1 - 8 of 8
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    Assessment of Subsurface Competency Using Geotechnical Method of a Proposed Structure F.C.T Nigeria
    (Bilingual Publishing Co., 2022-12-30) Osisanya, O.W.; Diyanuwa, A.B.; Korode, A.I.; Ibitoye, A.T.; Ajibade, F.Z.
    Structural failure has been recently happenings mostly in the commercially populated states along the coastal line in Nigeria. As a result, an open field at a chosen location in Abuja, Nigeria, was investigated. For the purpose of this study, test bores were drilled and Standard Penetration Tests (SPT) were conducted at every 1.5 m interval up to a maximum depth of 12.0 m with the bearing pressure ranging between 20 kN/m2 and 1000 kN/m2. 3 test bores were drilled within the plot location, and samples were obtained at the test bore’s locations for laboratory analysis. Findings revealed that subsurface lithology found at the site within the explored depths of 0.0 12.0 m is mostly silty sand, laterite, sandy clay, silty clay, clayey sand, and weathered rock. The findings from the sub-soils of the different places and their bearing pressures were computed with SPT N value. Building foundations may be rigid raft foundations at a depth of 2.0 meters below the present ground level, according to bearing capacity values that range from 20 kN/m2 to 60 kN/m2 at 1.5 to 3.0 meters. The recommended building foundations take into account the sub-soil’s characteristics at the drilling places at a depth of between 1.0 and 3.0 meters. The structure might also be supported by frictional piles buried 10 meters beneath the surface.
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    Hydrocarbon Reservoir Mapping and 3d Seismic Interpretation of “Deejay” Field, Onshore Niger Delta
    (RSIS International, 2021) Alabi, A.O.; Oyanameh, O.E.; Agbalagba, E.O.; Korode, A.I.; Osisanya, O.W.
    The 3-D seismic data interpretation and reservoir mapping of ‘‘Deejay field’’ have been carried out with the use of Schlumberger (PETRELTM) software. This research work is aimed at delineating the subsurface structure and deducing the trapping system of the study area that may aid hydrocarbon accumulation. The research methodology involved horizon and fault interpretation to produce subsurface structural maps. Available Wireline log signatures were employed to identify hydrocarbon bearing sands and compute reservoir petrophysical parameters for hydrocarbon pore volume determination. Two faults F_01 and F_02 (synthetic) were mapped using seismic structural attribute (variance) with fault polygon generated on the surface. Structural interpretation for inline 5533 revealed two horizons (1&2) were taken into consideration with their time and depth maps generated for the purpose of this study. The structural maps revealed fault assisted closures at the centre of the field which correspond to the crest of rollover anticlines and possibly served as the trapping medium. Three hydrocarbon bearing reservoirs - S1, S2 and S3 were delineated from three wells and the top and base of each reservoir window were mapped from the wells. Reservoirs S1, S2 and S3 have average porosity values of 30.7%, 29.8% and 29.3% respectively. All the porosity values obtained are in agreement with the established porosity values of Agbada formation of Niger Delta as it ranges from 28-32%. The obtained permeability index for the three reservoirs are rated very good. Hydrocarbon saturation values for the three wells have an average of 72.3% for S1, 83.7% for S2 and 76.7% for S3. The Petrophysical parameters from the wells show that most of the reservoirs are good targets in hydrocarbon prospecting. The result shows that the three reservoirs in the field have high hydrocarbon potential and good trapping mechanism for its productivity.
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    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.
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    Integration of 2D and 3D Electrical Resistivity Tomography for Volumetric Investigation of Geologic Formations in a Sedimentary Terrain
    (International Journal of Earth Sciences Knowledge and Applications, 2023) Murphy, O.I.; Osisanya, W.O.; Avwenaghegha, O.J.; Korode, A.I.; Amoyedo, A.A.
    In a wide variety of research fields, including agriculture, botany, road construction and mineral exploration, it is crucial to analyse the volume of dominant geologic formations in an area especially those of very high economic importance. Volumetric evaluation of geologic formations is an essential stride towards economic and local content development. Ten (10) 2D geoelectrical resistivity profiles were gathered in parallel and perpendicular equidistant lines using the Wenner array with maximum electrodes spread of 200m to investigate the subsurface geological stratification in both the vertical and horizontal direction at Obaretin community in the Edo State, Nigeria. Using Earth Imager 2D software, 2D resistivity-depth models were created from the 2D resistivity dataset with the use of wenner aray. In order to create a 3D depth slice and a 3D block model for the subsurface stratification, the survey dataset was compiled into a single 3D data set and inverted using Res3Dinv software and Voxler 4.0 programs. The 2D resisitivity imaging results revealed three geo-electric major layers at Obaretin, which are indicative of topsoil, silt sand, clayey sand, and lateritic sand with sandstone intercalations as the dominant geologic formations in the study area. The Resistivity lithology of the study area also showed three geo-electric subsurface layers to an appreciable depth of 40 m for Silt sand, topsoil (299–1791 Ωm), lateritic sand with sandstones intercalations (985–3253 Ωm), and clayey sand (48.9–1791 Ωm) were delineated. The study revealed that the dominant formations are laterite, silt sand and clayey sand which showed an estimated volumetrics of 373,508m3, 520,320 m3 and 194,800 m3 per two million m3 respectively which are in high economic quantities. Hence, the adoption of 2D and 3D electrical resistivity imaging has aided the successful volumetric assessment of geologic formations which are of high economic value in the study area.
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    Petrophysical Evaluation of Hydrocarbon Potential of “OMA” Field, Niger Delta
    (International Journal of Research and Innovation in Applied Science (IJRIAS) / RSIS International, 2022) Olarewaju, M.A.; Osisanya, O.W.; Korode, A.I.; Ibitoye, A.T.
    The goal of this study is to maximize hydrocarbon reserves by evaluating reservoirs using derived petrophysical parameters, a common practice in the oil and gas industry. In order to complete this task, data (logs) from three Niger Delta onshore wells (OMA01, OMA02, and OMA 03) were used. Gamma-ray, resistivity, and neutron-density well logs were used in this study for lithology identification, fluid delineation, and hydrocarbon identification. Petrel and Rokdoc software were used for lithology identification and petrophysical analysis computation. The qualitative analysis revealed that the wells drilled through various lithologies contained sand and shale intercalations. Three in WellOMA01, Four in WellOMA02, and Two in WellOMA03, reservoirs were delineated. The field's petrophysical analysis was also produced. Shale's volume varies from 10% to 24%, its porosity from 14% to 26%, and its water saturation from 16% to 53%, while its permeability was relatively high. The highest hydrocarbon saturation (84%) was found in RES 01 from WellOMA03. The "OMA" field study revealed that there is a sizably high potential for hydrocarbons.
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    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.
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    SEDIMENTARY DEPOSITIONAL SEQUENCE AND PETROPHYSICAL PROPERTY ANALYSIS FROMWELL LOGS OF ‘WONDER’ FIELD, COASTAL SWAMPDEPOBELT, NIGER DELTA
    (Zibeline International Publishing, 2024-03) Ishola, E.O.; Osisanya, W.O.; Korode, A.I.; Amoyedo, A.A.
    In the Niger Delta's "WONDER" field, seven wells were thoroughly examined. The petrophysical characteristics of the sequences were determined using sequence stratigraphy, and the lithostratigraphic settings were modeled. Utilizing Schlumberger Petrel Software and Microsoft Excel, well logs and reservoir sands (RES A, RES B, and RES C) were analyzed, and petrophysical parameters were calculated. Biostratigraphic plots of the varieties of foraminifera in the reference well (WON 12-ST1) showed three sequences. These were found by matching log trends with depositional settings. There were three maximum flooding surfaces and four sequence boundaries. All of the sequences were classified as type-1, and there were three system tracts: transgressive (TST), highstand (HST), and lowstand (LST). In the HST and LST, prograding and aggrading sands with diminishing shale volume uphill were combined with retrograding shale and sand units. In the LST, TST, and HST, hydrocarbon buildups were discovered based on resistivity log data and calculated hydrocarbon saturation values. Average petrophysical parameters showing different shale volumes, total porosity, hydrocarbon saturation, and permeability ranges were calculated for RES A, RES B, and RES C over the seven wells. Examples of these ranges were found in Reservoir A, where the permeability measured 6978–8391 mD, the hydrocarbon saturation ranged from 51–59%, and the amount of shale ranged from 9–14%. This research provides crucial insights into the sedimentary patterns and hydrocarbon potential of the "WONDER" field in the Niger Delta.
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    Structural Seismic Interpretation of Olaj - field within the Niger Delta.
    (IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG), 2021) Osisanya, O.W.; Korode, A.I.; Ighrakpata, F.C.; Asarhasa, P.E.; Nwigwe, G.C.
    Structural seismic interpretation is a key component of seismic interpretation workflow, as much information on reservoir architecture which is required for hydrocarbon play assessment can be obtained. This study presents the results of the integration of structural time-depth maps to define reservoir units across five (5) well for hydrocarbon play assessment of Olaj-field within the Niger Delta basin. Two reservoir windows (R1 and R2) were delineated from five wells (W-02, 04, 06, 07 and 012). The top and base of each reservoir window were delineated from the five wells using their gamma ray and resistivity log response. Well to seismic correlation was carried out with checkshot data from well-012. Structural interpretation for inline 6975 revealed about eight (8) faults labelled (F1, F2, F16, F8, F10, F18, F17 and F6) were mapped. It was observed that about five (5) faults (F1, F10, F18, F17 and F6) were identified as synthetic faults and dip basinwards towards the southern while about three (3) antithetic faults (F2, F16 and F8) were observed which dips landwards in the western direction. These are characteristics of growth faulting within the Niger Delta basin. Structural interpretation revealed a highly faulted reservoir system which depicts the tectonic setting of the Niger Delta.