Research Papers/Topics in Applied Geophysics

Geoelectrcal tomographic evaluation of the subsurface conditions of Dutse model and it environs,Dutse, Jigawa State,Nigeria using 2D Electrical Resistivity imaging

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 for...

DEPTH TO MAGNETIC SOURCE ANALYSIS USING SOURCE PARAMETER IMAGING (SPI), ANALYTICAL DEPTH AND SPECTRAL DEPTH ESTIMATES

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...

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...

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...

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