Full azimuth circular survey in Indonesia: Survey design, onboard illumination QC and preliminary processing results

Buia, Michele; Mapelli, L.; Tozzi, Emanuele; Bunting, Tim; Garden, Mikael; Tham, Michelle

doi:10.1190/1.3255856

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…However, if the shooting direction becomes important, it is likely that a narrow geometry is no longer adequate and a multi-or wide-azimuth survey is called for. (An interesting application of flower-plot analysis is to determine infill requirements of a coil shooting survey; see Buia et al, 2009a.) Campbell et al (2002) describe the use of modeling for optimal placement of OBCs to supplement the poor illumination achieved with a streamer survey in a complex part of the survey area (Section 4.3.7).…”

Section: Model-based Survey Designmentioning

confidence: 98%

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3D Seismic Survey Design, Second edition

Vermeer¹

2012

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Section: Model-based Survey Designmentioning

confidence: 98%

“…, , and Ross (2008) describe one such test; Houbiers et al (2009) describe a test offshore Norway. A commercial coil survey has been acquired in Indonesia (Buia et al, 2009a(Buia et al, , 2009bTozzi et al, 2009). A coilshooting technique with two streamer vessels and two source vessels is described by Moldoveanu and Kapoor (2009).…”

Section: Coil Shootingmentioning

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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