Seismic Raypath and Wavefront Models in the Lithofacies of the Niger Delta, Nigeria
Journal Title: Current Journal of Applied Science and Technology - Year 2017, Vol 20, Issue 2
Abstract
Seismic raypaths and wavefronts model in the vertically anisotropic lithofacies of the Niger Delta are presented. These models based on the linear increase of velocity with depth are defined by the parametric equations: For raypaths [ (centre) and (radii)]; and for Wavefronts [ (centre) and (radii)]. The take-off velocity, V0 = 1656 ms-1 and vertical velocity gradient, k = 0.44 s-1 previously determined for the Niger Delta served as input to these equations to generate the models in Graph (version 4.3) software. Raypaths are at offsets from 400 to 2000 m at 400 m intervals while the wavefronts are at travel times from 20 to 100 ms at 20 ms intervals. Raypaths are observed to be different from straight lines and travel in circular paths while wavefronts are circular arcs travelling greater distance in the vertical direction than in the horizontal for equal travel times. These models provide a basic framework in the Niger Delta for accurate ray tracing, velocity models development and traveltime calculations in seismic processing.
Authors and Affiliations
G. I. Alaminiokuma
Keywords
Related Articles
- EP ID EP318950
- DOI 10.9734/BJAST/2017/5100
- Views 111
- Downloads 0
Molecular Identification and Characterization of Alphasatellites Associated with Okra Enation Leaf Curl Virus
Symptomatic okra plants showing leaf curling, typical yellowing and thickening of veins were collected and characterized. Full genome of the virus was amplified using phi-29 polymerase exploiting rolling circle amplifica...
Geochemical Characteristic and Petrogenesis of Malumfashi Schist around Tandama Area, North-Western Nigeria
Malumfashi schists which occur in association with migmatite-gneisses and biotite granite, occupy about 60% of Tandama area, north-western Nigeria. These rocks were studied with a view to evaluate their compositional cha...
Physicians Knowledge of Radiation Risk in Prescribing CT Imaging in Moroccan Hospitals
Aims: This study aims to assess physicians’ knowledge on patients’ radiation protection during their computed tomography (CT) scan prescriptions. Materials and Methods: A standardized questionnaire in multiple-choice fo...
Analysis of Climate Change Impacts in Ngerengere Sub-Basin Using Data-driven Model
The basic premises of this study is to analyze climate change impacts on flow rate in Ngerengere sub-basin using the data-driven model. Stream flows of sub-basin were simulated by skilled GCMs using data-driven model and...
Comparison of Potential Evapotranspiration Models and Establishment of Potential Evapotranspiration Curves for Temperate Kashmir Valley
Potential evapotranspiration (PET) is a crucial indicator of hydrologic regime of a region. It is an important variable in the estimation of actual evapotranspiration (AET) in hydrological and ecosystem modeling. Evapotr...