ABSTRACT In this work, an attempt was made to estimate the depth to magnetic source and by inference, the thickness of sediments within parts of the Sokoto Basin, Northwestern Nigeria. Aeromagnetic data of Tambuwal (Sheet 50) was acquired, processed and interpreted. The regional field was separated from the total magnetic intensity (TMI) and the magnetic anomaly was obtained. The anomaly map was upward continued and divided into overlapping square grids of 27.5 km x 27.5 km. Spectral depth an...
Abstract A 4-D seismic data comprising of two 3-D seismic volumes acquired at different vintages were successfully applied to identify the presence of by-passed oil opportunities in the water-driven reservoirs in an offshore area of bonny island in south-south part of Nigeria. Cross-plots of rock attributes from well data were carried out to validate their sensitivity to reservoir fluids and lithology and to constrain the interpretation of the time lapse inversion results. 4-D inversion of ...
ABSTRACT Integrated aerogeophysical datasets (aeromagnetic and airborne radiometric) were used for the litho-structural and depth characterisation and to assess the environmental radiation risks in part of Igarra, southwestern Nigeria. The total magnetic intensity (TMI) reduced to the magnetic equator gridded data were enhanced using first vertical derivative, analytic signal, tilt derivative, and spectral and Euler deconvolution analyses to improve and enhance the subsurface rocks’ textura...
ABSTRACT A geophysical investigation involving the electrical resistivity method was carried out at IkoleEkiti of South Western, Nigeria with the main aim of investigating the area for groundwater potential of the regolith aquifer. The objectives are to identify geological structures and aquifers favorable to groundwater accumulation andalso input geoelectric layers parameters into a software to produce maps of the subsurface in order to determine the groundwater potential of the regolit...
ABSTRACT Studies on the distribution, sources and impacts of Heavy Metals (HMs) and Polycyclic Aromatic Hydrocarbons (PAHs) in soils and sediments of Urbanised Industrialised Cities (UICs) are integral part of environmental monitoring programme globally. Results from such, have been used to design appropriate mechanisms for the sustainable use of environmental media. However, several Nigerian UICs, such as Onitsha, the most industrialized city Southeastern Nigeria, have not been adequately st...
Rivers State as the nomenclature depicts is a state richly blessed with both surface and subsurface water. As a result of this, there is less problem of water scarcity, especially in the elite cities of the state, but so many other communities due to one reason or the other still wallow in abject water scarcity. In this survey, a total of seven (7) vertical electric soundings were carried out using Schlumberger configuration at Obibi community in Omuma local government area, Rivers State, to ...
A resistivity survey was carried out to study groundwater potential in Ignatius Ajuru University of Education in Rumuolumini Town, Rivers State of Nigeria with the aim of determining the depth, thickness, resistivity and lithology at which potable water can be obtained. Two Vertical Electrical Soundings were conducted using the Schlumberger configuration. The VES data were subjected to an iteration software (IPI2WIN) which showed that the area is composed of top soil, clay, mud and sand. Base...
The study gives an overview on the utility of two dimensional direct current resistivity methods to explore the subsurface condition of Dutse Model International School and its Environs. Four parallel profiles each of length 200m and separated 120m apart were established. Currents and corresponding voltages were collected for the various investigating points with electrode spacing ranging from 5 to 60m. The collected data was reduced to resistivity values and then arranged in Notepad in a fo...
ABSTRACT Wireline logging is a veritable tool for the determination of hydrocarbon beneath the subsurface, it is applied by prospecting companies hence, this work studies geological wireline logging and their application in oil and gas reservoir beneath the earth’s surface. Wireline logging is performed by lowering a logging tool of one or more instruments on the end of a wireline into an oil well and recording petro physical properties using a variety of sensors. This logging process is ai...
ABSTRACT In a bid to determine the groundwater potential of some parts Orsu and environs, which lies within latitude N5º53.858΄ to N5º47.572΄ and longitude E7º0.847΄ to E6º56.988΄, a total of ten (10) vertical electrical soundings were carried out. The study area belongs to the Anambra basin which is one of Nigeria’s most important hydrological basins. It is overlain by the Miocene to recent Benin formation and Eocene Ameki formation.Equipment such as ABEM terrameter SA...
ABSTRACT The research project was carried out to study the estimations of interval velocity from seismic reflection data of the acoustic P waves inside the Earth using the method of time migration which is necessary for obtaining seismic images in regular Cartesian coordinates. The main goals of the research work were to develop algorithms to convert time-migration velocities to true seismic velocities, and to convert time-migrated images to depth images in regular Cartesian coordinates. The...
Geophysical investigation involving the electrical resistivity method was carried out at a site earmarked for construction of a Lecture Theatre at the Obafemi Awolowo University Teaching Hospital Complex (OAUTHC) in Ile-Ife, Osun State Nigeria. The aim was to generate 2-D subsurface images beneath the site which will provide the required geological information for location and design of the building foundation. The geophysical investigation involved the 2-D imaging technique which utilized ...
Four sheets of aeromagnetic data, which are the aeromagnetic map of Nsukka, Udi, Nkalagu, and Igunmale were obtained from the Nigerian Geological Survey Agency, these areas are within the Lower Benue trough and Anambra Basin, Southeast of Nigeria. Oasis Montaj 6.4.2, ArcGIS 10.2.2, Surfer 11, and Excel 2016 software, were used in the processing and interpretation of the aeromagnetic data obtained qualitatively and quantitatively. The results of the qualitative interpretation on application of...
This report describes the acquisition, processing, and results of the University of Ilorin Department of Geophysics 2019 Summer Field Camp. From 4th of April through 7th of April, a team of undergraduate students from the University of Ilorin, along with lecturers and department technicians conducted a series of geophysical surveys at Share, Tsaragi and Yikpata area in Kwara state. In...
ABSTRACT Aeromagnetic data over some part of the Chad Basin, Nigeria was analyzed. The aeromagnetic anomaly map, its qualitative and quantitative interpretation helped in identifying the nature and depth of the magnetic sources in the study region. The regional-residual separation was performed with a first order polynomial using oasis montaj software. The residual data obtained was contoured into 3-D maps and this revealed two prominent magnetic anomaly source intensities; the low freque...