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Introduction
The quality of land
seismic data suffers from irregularities within the near surface, which is
composed of layers that have experienced variable degrees of weathering.
Examples of these irregularities include: lateral variation in thickness,
lateral and vertical velocity variations, rugged topography, karst structures,
and effects of near-surface water. The effects of these irregularities on
seismic data include: statics, scattering, multiples, ground roll, weak
penetration of signal into deeper layers, and severe amplitude losses. These
effects on seismic data are more severe in arid areas due to the extensive
weathering that these areas have experienced during their geological history.
Therefore, it comes as no surprise that petroleum companies working with seismic
data in Middle Eastern countries suffer greatly from near-surface effects. This
can be evidenced by the increasing number of forums devoted to issues of the
near-surface during the last few years. These events were organized by regional
and international petroleum companies and societies.
We, at
KFUPM, believe that a full understanding of these effects and how they relate to
near-surface structures require a multidisciplinary approach. Therefore, we
initiated the Near-Surface Seismic Investigation Consortium (NSSIC), a
consortium devoted to the investigation of near-surface effects on petroleum
seismic data using a multidisciplinary approach. The Consortium involves
science and engineering disciplines that study the near surface including:
geophysics, geology (sedimentology and hydrogeology), civil engineering (soil
characterization), electrical engineering (signal processing), and applied
mathematics. The aim of this website is to introduce this new consortium to
prospective sponsors and seek their financial support for the Consortium.
Web site and all contents © Copyright NSSIC 2007, All rights reserved.
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