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Abstract

Accurate corrections for topography and near-surface complexities of surface seismic data from the Arabian Peninsula require accurate modeling of the near-surface and an effective correction algorithm that uses of the model. Refraction and residual statics-based modeling, though they help improve results, have fallen short of what is required in complex regions in the area. In fact, almost all the existing near-surface correction methods require an accurate near-surface velocity model. In some cases, however, the model is impossible to estimate from conventional low-resolution seismic data in which the near-surface inhomogeneities occur within the near-field region of wave propagation. Through numerical modeling, we show that a reasonably accurate shallow-velocity<br>model can be obtained from applying conventional horizon-based velocity analysis on shallow high-resolution seismic data. The model proved to be effective in correcting the conventional deep seismic image using either the simple static shifts or wave-equation datuming. We also present a novel idea to acquire high-resolution shallow seismic data in a cost-effective way. The novelty of the approach is in the spacing of the receivers, in which we used conventional acquisition configurations to acquire the high-resolution data with minimal additional cost. We investigated the resolution limits achieved from conventional configurations. A real experiment in the Riyadh region shows the possible resolution limits obtainable using this approach.

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/content/papers/10.3997/2214-4609-pdb.246.17
2008-01-03
2021-10-17
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.246.17
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