3-D Seismic Survey Design

Vermeer, Gijs J. O.

doi:10.1190/1.9781560801757

Cited by 106 publications

(47 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Compared with the conventional array acquisition, it uses the methods of point source, point receiver, small sampling interval and abundant traces in the field. It avoids perturbations within the array and records the full seismic wavefield with high fidelity (van Barren et al, 2012;Vermeer, 2002), which is beneficial to statics and interference identification and attenuation. The technique can greatly improve the resolution and imaging accuracy of seismic data as well as enhancing the capability of characterizing complex reservoirs (Andrew, 2004;Jonathan et al, 2005;Stein et al, 2010;Stephen, 2003).…”

Section: Introductionmentioning

confidence: 99%

Full-Azimuth, High-Density, 3D Single-Point Seismic Survey for Shale Gas Exploration in a Loess Plateau Area, Southeast of Ordos Basin, China

Wang

2015

Energy Exploration & Exploitation

View full text Add to dashboard Cite

Southern Ordos Basin contains plentiful oil and gas shale resources in the Mesozoic and Upper Paleozoic. It is known that the surface in this region is covered by thick loess layers with severe variations in tomography, thickness and velocity. The adverse surface conditions result in complex statics problems and heavy scattering noise and also cause serious absorption of high-frequency energy. Conventional seismic surveys obtain poor quality seismic data, which could hardly be used to obtain information about gas shale reservoirs. In order to study strong heterogeneous gas shale reservoirs and improve the success rate of horizontal wells, a new 3D seismic survey was acquired in the typical loess plateau area by using the WesternGeco UniQ integrated point-receiver land seismic system. The new survey is designed as full-azimuth, high-density, point-source/point-receiver in order to fully sample the seismic wavefield and avoid the irreversible signal damage caused by conventional field array techniques. By taking advantage of the benefits of UniQ seismic data, targeted data processing sequence is given to resolve the specific complicated statics and noise attenuation problems. Compared with the previously acquired 2D crooked line high-resolution seismic data in the gullies, the result of UniQ seismic data exhibits significant improvement both in the single-to-noise ratio (SNR) and the image quality of target layers. This indicates that the UniQ seismic data will be more feasible to facilitate gas shale characterization.

show abstract

Section: Introductionmentioning

confidence: 99%

Full-Azimuth, High-Density, 3D Single-Point Seismic Survey for Shale Gas Exploration in a Loess Plateau Area, Southeast of Ordos Basin, China

Wang

2015

Energy Exploration & Exploitation

View full text Add to dashboard Cite

show abstract

“…Residual azimuthal variations in traveltime after migration can be measured by using migration binning schemes which preserve both offset and azimuth information [22,23]. After the first pass of (isotropic) migration, azimuthal variations in velocity are detected from residual moveout, which then provides the velocity model for anisotropic migration.…”

Section: Introductionmentioning

confidence: 99%

Azimuthally Anisotropic 3D Velocity Continuation

Burnett

Fomel

2011

International Journal of Geophysics

View full text Add to dashboard Cite

We extend time-domain velocity continuation to the zero-offset 3D azimuthally anisotropic case. Velocity continuation describes how a seismic image changes given a change in migration velocity. This description turns out to be of a wave propagation process, in which images change along a velocity axis. In the anisotropic case, the velocity model is multiparameter. Therefore, anisotropic image propagation is multidimensional. We use a three-parameter slowness model, which is related to azimuthal variations in velocity, as well as their principal directions. This information is useful for fracture and reservoir characterization from seismic data. We provide synthetic diffraction imaging examples to illustrate the concept and potential applications of azimuthal velocity continuation and to analyze the impulse response of the 3D velocity continuation operator.

show abstract

“…Therefore, survey design should also involve the effectiveness of surface-wave separation for a given acquisition geometry. For 3-D seismic surveys, the basic survey parameters are the four spatial sampling intervals and apertures of the template geometry (Vermeer, 2012). The four spatial sampling intervals are defined by the receiver and source intervals, each in two sampling directions that are usually orthogonal.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Surface-wave Separation on Seismic Survey Design

Ishiyama¹,

Blacquière²,

Mulder³

2015

Proceedings

View full text Add to dashboard Cite

SUMMARY3-D seismic survey design provides an acquisition geometry for obtaining seismic data that enable imaging and amplitude-versus-offset applications of target reflectors with sufficient quality under given economical and operational constraints. However, in land or shallow water environments, surface waves are often dominant and will lower the quality of the final output. The necessity to remove them from the seismic data imposes additional constraints on the acquisition parameters. Here, we try to understand how the application of surface-wave separation affects the choice of survey parameters and the resulting data quality. Quality is quantified by the signal-to-noise ratio of the seismic data after surface-wave separation or removal. In a case study, we applied surface-wave separation and signal-to-noise ratio estimation to several data sets with different survey parameters. We found that the spatial sampling intervals of the basic subset are the most important ones among the various types of survey parameters. The resulting data quality as a function of the spatial sampling intervals follows a trend curve. Finer spatial sampling intervals lead to better data quality up to a point where the curve flattens and a plateau is reached. The actual shape of the trend curve depends on the method of surface-wave separation.

show abstract

3-D Seismic Survey Design

Cited by 106 publications

References 0 publications

Full-Azimuth, High-Density, 3D Single-Point Seismic Survey for Shale Gas Exploration in a Loess Plateau Area, Southeast of Ordos Basin, China

Full-Azimuth, High-Density, 3D Single-Point Seismic Survey for Shale Gas Exploration in a Loess Plateau Area, Southeast of Ordos Basin, China

Azimuthally Anisotropic 3D Velocity Continuation

The Impact of Surface-wave Separation on Seismic Survey Design

Contact Info

Product

Resources

About