Vivian Oguadinma - Academia.edu (original) (raw)
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Suez University Faculty of Petroleum and Mining Engineering
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The result of the lithofacies characterization, textural analysis using univariate, bivariate and... more The result of the lithofacies characterization, textural analysis using univariate, bivariate and multivariate analyses of environmentally sensitive parameters of the Nanka Sandstone show that the sandstone was deposited by tidal processes within a shallow, marine agitated environment, possibly the foreshore to upper shoreface setting. The sandstone is dominated by fine-medium grained, moderately sorted sandstones with clay-draped cross beds, reactivation structures, flaser beds, sigmoidal foreset laminations/beds and tidal bundles as well as Ophiomorpha and chondritesisp burrows. Porosity and permeability assessment of the sandstones using the empirical equation of Hazen showed average porosity and permeability values of 0.43 and 8.45m/d respectively for the Sandstone. The low permeability, in spite of the good porosity, is attributed to the high content of clays as drapes, flaser beds as well as disseminations in the sandstone.
International Journal of Advanced Geosciences, 2017
Interference of ground roll energy on true seismic reflection records has continued to pose a ser... more Interference of ground roll energy on true seismic reflection records has continued to pose a serious challenge to exploration geophysicists. In view of this, amplitude and power spectra of the Rayleigh waves which are the precursor of the ground roll energy were derived from over 70 raw monitor records and plotted as a function of frequency. The objective is to determine the locus of ground energy in the seismic records, analyse their dispersion pattern and suggests viable ways of suppressing them. The results of the amplitude spectrum plots revealed that Rayleigh waved exhibit oscillatory behavior with very high-amplitude values, which correspond to the locus of ground roll energy. This energy is confined to very low frequency range of about 4-9Hz. The Power spectrum which was given as the square of the amplitude as a function of frequency showed appreciable lobes of breaths of the ground roll energy of about 0.5-0.7cm and their trend of dispersions. The power spectrum plots revea...
SEG Technical Program Expanded Abstracts 2016, 2016
Geological Society of America Abstracts with Programs, 2017
The result of the lithofacies characterization, textural analysis using univariate, bivariate and... more The result of the lithofacies characterization, textural analysis using univariate, bivariate and multivariate analyses of environmentally sensitive parameters of the Nanka Sandstone show that the sandstone was deposited by tidal processes within a shallow, marine agitated environment, possibly the foreshore to upper shoreface setting. The sandstone is dominated by fine-medium grained, moderately sorted sandstones with clay-draped cross beds, reactivation structures, flaser beds, sigmoidal foreset laminations/beds and tidal bundles as well as Ophiomorpha and chondritesisp burrows. Porosity and permeability assessment of the sandstones using the empirical equation of Hazen showed average porosity and permeability values of 0.43 and 8.45m/d respectively for the Sandstone. The low permeability, in spite of the good porosity, is attributed to the high content of clays as drapes, flaser beds as well as disseminations in the sandstone.
International Journal of Advanced Geosciences, 2017
Interference of ground roll energy on true seismic reflection records has continued to pose a ser... more Interference of ground roll energy on true seismic reflection records has continued to pose a serious challenge to exploration geophysicists. In view of this, amplitude and power spectra of the Rayleigh waves which are the precursor of the ground roll energy were derived from over 70 raw monitor records and plotted as a function of frequency. The objective is to determine the locus of ground energy in the seismic records, analyse their dispersion pattern and suggests viable ways of suppressing them. The results of the amplitude spectrum plots revealed that Rayleigh waved exhibit oscillatory behavior with very high-amplitude values, which correspond to the locus of ground roll energy. This energy is confined to very low frequency range of about 4-9Hz. The Power spectrum which was given as the square of the amplitude as a function of frequency showed appreciable lobes of breaths of the ground roll energy of about 0.5-0.7cm and their trend of dispersions. The power spectrum plots revea...
SEG Technical Program Expanded Abstracts 2016, 2016
Geological Society of America Abstracts with Programs, 2017