Lessons learned from acquiring and processing a full‐azimuth 3D land seismic survey in Kuwait

Rached, G. R.; Al-Genai, Jarrah; Al-Ajmi, Bader

doi:10.1190/1.3255151

Cited by 5 publications

(2 citation statements)

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“…A very special testing method is to acquire a pilot survey, which can be used to learn about new acquisition techniques and/or to determine the most suitable survey parameters in an area where more 3D surveys are likely (Shabrawi et al, 2005;Dutta et al, 2009;Rached et al, 2009). If there is serious doubt about the acquisition parameters to be used, the pilot survey must be overdesigned, allowing decimation tests.…”

Section: Testingmentioning

confidence: 99%

“…In one implementation, they use what can be called "fat" receiver lines, in which each receiver line consists of up to four sublines, each subline being densely sampled. The single geophones are staggered in adjacent sublines such that in the inline direction, the effective geophone sampling is equal to the basic sampling interval or to the adequate sampling interval (Dutta et al, 2009;Rached et al, 2009). The fat receiver lines can simulate shot arrays in the crossline direction, thus allowing the use of larger shot intervals equal to the effective width of the fat receiver lines.…”

Section: Single-point Acquisition Versus Array-based Acquisitionmentioning

confidence: 99%

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3D Seismic Survey Design, Second edition

Vermeer¹

2012

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Section: Testingmentioning

confidence: 99%

Section: Single-point Acquisition Versus Array-based Acquisitionmentioning

confidence: 99%

3D Seismic Survey Design, Second edition

Vermeer¹

2012

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3D symmetric sampling of sparse acquisition geometries

Vermeer¹

2010

GEOPHYSICS

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3D symmetric sampling introduced in the 1990s is characterized by dense sampling of two of the four spatial coordinates. The two sparsely sampled coordinates determine the periodicity of the geometry and the dimension of the offset-vector tiles that can be used to generate pseudocommon-offset-vector gathers. These gathers turn out to be useful for prestack processing applications, such as regularization, migration velocity analysis, and azimuthal anisotropy analysis. Although single-point acquisition is the ideal acquisition method, it is not necessarily better than array-based acquisition. Field arrays are still useful in suppressing noise and need not harm signal in most practical cases. In hybrid geometries three spatial coordinates are sampled densely. In all published cases at least two of the three are sampled quite coarsely and may not provide the best quality for the given trace density. Coil geometry (sailing in circles) is a special case of wide-azimuth towed streamer acquisition. It is essentially a random geometry that should be modifiable into a geometry with regularly sampled midpoints, absolute offsets and azimuths. Despite recent technological developments, the basic idea of 3D symmetric sampling still is a highly useful principle for the design of land and marine 3D seismic surveys.

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