Research Papers/Topics in Applied Geophysics
Application of Very Low Frequency (VLF) Electromagnetic method to mineral exploration (Mining Geophysics) with case study review.
The Very Low Frequency Electromagnetic (VLF-EM) method, which enables surveying without contact with the ground, is suitable for ground surveys in a wide area and has been used in mapping geology and in mineral exploration for decades. The technique makes use of signal radiation from military navigation radio transmitters operating in the frequency range of 15-30 kHz. When the electromagnetic wave impinges on the surface it is both reflected back into the air and refracted into the earth. By ...
MAPPING OF MAGNETIC ANOMALIES IN SOME PARTS OF NIGERIA CHAD BASIN, USING AEROMAGNETIC DATA
ABSTRACTAeromagnetic 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 fre...
Interpretation of Geoelectric Pseudo-Section of a Profile Across a Functional Borehole Located in-between Two Non-Functional Dug-Well
Groundwater exploration
Geo-electrical investigation of underground water
Groundwater exploration
Publication6
Geophysical investigation of groundwater potential
Investigation into the weathering layer using up-hole method of seismic refraction.
This paper is aimed at using up-hole method of seismic refraction survey to investigate the thickness ofthe weathering layer as well as the velocity of seismic waves through the layer. The first events to arriveat the geophones on a refraction profile had travelled by refraction along the top of the high speed zonejust below the weathering layer. Using the time- offset curves of the first arrivals for shots from differentcharge depths; the thickness of the weathering layer was calculated by c...
Integration of Aeromagnetic Data and Landsat Imagery for Structural Analysis: A Case Study of Awgu in Enugu State, South-Eastern, Nigeria.
In this study, digital format data comprising of aeromagnetic and remotely sensed (Landsat ETM+7) data were used for structural interpretation of the Awgu area in Enugu State, southeastern part of Nigeria, predominantly underlain by sedimentary rocks. Aeromagnetic data were analyzed using the Oasis Montaj 7.5 software and interpretation was carried out using the vertical and horizontal gradients, analytical signal, reduction to pole, tilt depth as well as Euler deconvolution. The total magnet...
Integration of Aeromagnetic and Landsat Data in the Analysis of Dump Site (Landfill) in Owerri, Imo State.
Magnetic study over South Eastern Nigeria was performed as part of a multi-technique geophysical investigation. Various magnetic data enhancement procedures such as, qualitative (second vertical derivative, total horizontal derivative, analytic signal, theta map, tilt derivative, total horizontal derivative of tilt derivative and horizontal tilt angle) and quantitative (Werner and Euler deconvolutions) interpretation techniques were employed to determine their e...
Determination of subsurface rock properties from AVO analysis in Konga oil field of the Niger Delta, Southeastern Nigeria.
Amplitude variation with offset (AVO) analysis was carried out on Konga oil field, an onshore oil field in the Niger Delta, Southeastern Nigeria. The study consisted of forward modeling from rock parameters measured from well logs and AVO analysis of events on pre-stack time migrated 3D seismic gathers. Forward modeling predicted specific AVO behaviour of anomalous reservoir sands in the field. Density, compressional and shear wave velocity logs, combin...
Evaluation of Waste Landfill Using 2-D Resistivity Imaging. ( A Case Study Of Iguomo Dumpsite) Edo State, Nigeria
AbstractMunicipal solid waste disposal sites can be sources of groundwater contamination and the contamination problems are more likely to occur in humid areas, where the moisture available exceeds the ability of the waste pile absorb water. 2-D resistivity imaging has frequently been used in the subsurface pollution studies. The method maps the distribution of resistivity of subsurface materials. The 2-D resistivity image provides general information on subsurface stratification of buried wa...
QUALITATIVE PETROPHYSICAL ANALYSIS OF WELL LOG DATA FROM WABI FIELD_By Popoola, Oladotun, 2015
ABSTRACT Qualitative Petrophysical Analysis of Wabi 10 well, located in the Wabi Oil Field in the Niger Delta was carried out. The wire-line log comprising of gamma rays, resistivity and neutron – density logs provided by Total Exploration and Production Nigeria Limited (TEPNL) was used. The properties considered include Lithofacies, the Permeable and Impermeable beds with thei...
Development of a Geo-electrical Database Management System (GDBMS) for Geoscientist Application.
In the field of geosciences, large sum of data are always acquired, processed and interpreted for different geographic locations, but only few of the data are well managed, such that, they can be useful for subsequent geoscience related surveys carried out in the same geographical locations. This is a challenge in the geoscience field, and it would be beneficial to the field when this challenge is resolved and it becomes a utilisable concept. It is in this regard tha...
Geoelectrical Investigation of Soils as Foundation Materials in Umudike Area, Southeast Nigeria
Geoelectrical investigation of soils in Umudike area of Abia State was undertaken in order to determine the competence of the soils as foundation materials. A total of 18 Vertical Electrical Sounding (VES), using Schlumberger configuration was carried out. The results revealed three to six distinct geoelectric sequences w...
Establishment of Electromagnetic Distance Measurement (EDM) Calibration Base
Electromagnetic Distance Measurement (EDM) equipment is calibrated on a base to determine instrument constants and errors. A series of measurements on a base can also be used to check the performance and reliability of the instrument over time and to assess its precision against the manufacturer's specifications. This research work, the establishment of Electromagnetic Distance Measurement (EDM) calibration base entails the setting up of a functional base where calibration of e...
Preliminary structural evaluation of an X-Field Onshore in Niger Delta using 3D seismic data
A structural evaluation of a post stack time migrated (PSTM) 3D seismic data over an X–Field in the eastern Niger Delta has been attempted. The objective of the study is to structurally evaluate the field with a view to identifying structural features such as faults, map geologic horizons and analyze reflection characteristics that might be a good lead to probable hydrocarbon accumulations. Results revealed that six growth faults (F1, F2, F3, F4, F5, and F6) and three seismic horizons (HI, ...
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