Estimation of long‐wavelength near‐surface velocity and low‐relief structural anomalies Part I. A case history in central Saudi Arabia

Pecholcs, Peter I.; Nguyen, Sun V.; Kosloff, Dan; Litvin, A.

doi:10.1190/1.1885568

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…The static correction is the sum of the weathering and subweathering times. Pecholcs et al (1997) demonstrated that there is a time shift between conventional refraction statics and the single-layer velocity model. Where there are no significant variations in the near surface, the plus/minus model and the two-layer model converge.…”

Section: Plus/minus Modelmentioning

confidence: 98%

Comparing state‐of the art near‐surface models of a seismic test line from Saudi Arabia

Bridle

Barsoukov

Al-Homaili

et al. 2006

Geophysical Prospecting

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A B S T R A C TWe present a seismic Test Line, provided by Saudi Aramco for various research teams, to highlight a few major challenges in land data processing due to near-surface anomalies. We discuss state-of-the-art methods used to compensate for shallow distortions, including single-layer, multilayer, plus/minus, refraction and tomostatics methods. They are a starting point for the new technologies presented in other papers, all dealing with the same challenging data described here.The difficulties on the Test Line are mostly due to the assumption of vertical raypaths, inherent in classical applications of near-surface correction statics. Even the most detailed velocity/depth model presents difficulties, due to the compleXraypath. There is a need for methods which are based on more complex models and theories.

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Section: Plus/minus Modelmentioning

confidence: 98%

Comparing state‐of the art near‐surface models of a seismic test line from Saudi Arabia

Bridle

Barsoukov

Al-Homaili

et al. 2006

Geophysical Prospecting

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show abstract

“…In theory, we need only record the radial component of the motion of a seismic wave at a few offsets from the source by point receivers. In standard practice, acquisition aims to enhance deep reflections by recording the vertical component of a receiver array ͑e.g., Kosloff et al, 1997;Pecholcs et al, 1997;2001͒. Thus, so-called direct arrivals observed as a quasi-linear trend in common-source gathers are actually shallow refractions or diving waves.…”

Section: Introductionmentioning

confidence: 97%

Painting the near surface using geology, geophysics, and satellites

et al. 2009

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A smooth interpolation of a sparse uphole survey may be the main tool available for modeling the near surface in desert areas. An uphole survey does not properly define sharp, nearsurface velocity changes associated with lithologic and topographic variations such as cliffs, canyons, or outcrops, which may be delineated by satellite imagery instead. We present a patchy interpolation technique to build a consistent near-surface model. The algorithm is based on K-means clustering to integrate geological, geophysical, and remote-sensing information. A somewhat arbitrary aspect of the method is the choice of how many clusters are used in segregating the data. Linking this parameter to surface geologic formations may be inadequate because P-or S-wave velocities are unlikely to have a sufficiently unique correlation with geologic age and lithology. We suggest an empirical criterion: improvement in the seismic stack section achieved by processing with parameters derived by various clustering choices and data-type combinations. This approach was tested using field data from Saudi Arabia.

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Plus/Minus refraction method applied to a 3D block

Bridle

2006

SEG Technical Program Expanded Abstracts 2006

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Estimation of long‐wavelength near‐surface velocity and low‐relief structural anomalies Part I. A case history in central Saudi Arabia

Cited by 4 publications

References 2 publications

Comparing state‐of the art near‐surface models of a seismic test line from Saudi Arabia

Comparing state‐of the art near‐surface models of a seismic test line from Saudi Arabia

Painting the near surface using geology, geophysics, and satellites

Plus/Minus refraction method applied to a 3D block

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