الفهرس 
المقدمةOnly 14 pages are availabe for public view
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Abstract
Abstract
The thesis objectives are focused on criticizing the problematics of the conventional
acquisition, as the bad resolution of the pre-Messinian salt, and application of the up-todate
of broadband seismic reflection acquisition for enhancing the pitfalls of seismic
classical tools. Also, studying comparatively the disadvantages of the conventional
seismic acquisition and the advantages of the broadband acquisition, and discussing the
contributions of the new achievements of the broadband seismic in discovering the hidden
hydrocarbon reserves of the deep section. Then, pointing out a recommendation of
carrying out these new techniques for the open areas stretched along the entire range of
the Egyptian Western Mediterranean region. This work achieved through investigating
the subsurface geological challenges, the possible acquisition technologies and
optimizing the frequency range, to overcome the pre-Messinian salt velocity and
thickness variations, and increase the signal to noise ratio, through the analysis of the
different acquired 2D and 3D seismic surveys, 3D NEMed 2002-2003 and 3D NNK
2015, which have moderate to poor data quality for the Oligo-Miocene.
The results show that, the broadband seismic reflection acquisitions present
significantly richer frequency content than the conventional seismic reflection
technology. The amplitude spectra show that, the broadband has more low and high
frequency content, looks little noises and better continuity than the conventional
acquisition; this is clearly visible on the frequency panels of the seismic data, especially
on panel 30-40 Hz. In the Pre-Messinian section, the broadband seismic acquisition has
a clearly superior image relative to the conventional survey, in both the bandwidth and
event continuity. from the Signal to Noise map, generally by the broadband shows a
nicely higher and uniform S/N ratio over the whole section than the conventional data.
In the conventional acquisition system is said to give a usable bandwidth of
typically between 8–80 Hz, whereas broadband seismic systems are claimed to give
usable frequencies from as low as 2.5 Hz up to 200 Hz or more for shallow targets. The
low frequency data provides deeper penetration useful for imaging deep targets and
provides greater stability in inversion. Broader bandwidths produce sharper detailed
definition. Several leads are identified throughout the area. These are mapped out,
which indicates that several source rocks could have generated and expelled
hydrocarbons (notably Oligo-Miocene biogenic gas and Early Cretaceous – Eocene