A Universal Simultaneous Shooting Technique

Kok, R.J. de; Gillespie, Diana

doi:10.3997/2214-4609-pdb.5.a004

Cited by 18 publications

(8 citation statements)

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“…The appearance is similar to adding two, opposite direction, off-end shots into the same image space. The paper also discussed several practical methods for removing the overlap of the propagating wavefields, to produce two records, including the straightforward approach of stacking, as suggested by Lynn et al (1987) and the more complicated time shift encoded (dithered) techniques described by De Kok and Gillespie (2002), Stefani, Hampson and Herkenhoff (2007) and Moore et al (2008). When the two sources are placed at either end of the recording cable, the records are separable by virtue of the conflicting dip and the interference can be further attenuated if small random but known, time shifts are added to one source, to make the interference noise less coherent in the final image domain…”

Section: E X I S T I N G S I M U L T a N E O U S S O U R C E T E C H mentioning

confidence: 99%

“…The stack quality within the interference overlap zone could be improved by including a version of the time shift dithering during recording as described by De Kok and Gillespie (2002), Stefani et al (2007) and Moore et al (2008). For distance separated simultaneous sweeping (DS 3 ), the dither shifts are better implemented spatially rather than temporally.…”

Section: Figure 10mentioning

confidence: 99%

“…The paper also discussed several practical methods for removing the overlap of the propagating wavefields, to produce two records, including the straightforward approach of stacking, as suggested by Lynn et al . (1987) and the more complicated time shift encoded (dithered) techniques described by De Kok and Gillespie (2002), Stefani, Hampson and Herkenhoff (2007) and Moore et al . (2008).…”

Section: Existing Simultaneous Source Techniquesmentioning

confidence: 99%

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Distance separated simultaneous sweeping, for fast, clean, vibroseis acquisition

Bouska¹

2009

Geophysical Prospecting

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A B S T R A C TDistance separated simultaneous sweeping DS 3 is a new vibroseis technique that produces independent records, uncontaminated by simultaneous source interference, for a range of offsets and depths that span all target zones of interest. Use of DS 3 on a recent seismic survey in Oman, resulted in a peak acquisition rate of 1024 records per hour. This survey employed 15 vibrators, with a distance separation of 12 km between simultaneous active sources, recorded by 8000 active channels across 22 live lines in an 18.5 km × 11 km receiver patch. Broad distribution of simultaneous sources, across an adequately sized recording patch, effectively partitions the sensors so that each trace records only one of the simultaneous sources. With proper source separation, on a scale similar to twice the maximum usable source receiver offset, wavefield overlap occurs below the zone of interest. This yields records that are indistinguishable from non-simultaneous source data, within temporal and spatial limits. This DS 3 technique may be implemented using a wide variety of acquisition geometries, optimally with spatially large recording patches that enable appropriate source separation distances. DS 3 improves acquisition efficiency without data quality degradation, eliminating the requirement for special data processing or noise attenuation. I N T R O D U C T I O NThe prime motivation for employing any simultaneous source technique is to achieve operational efficiency improvements, which help reduce the cost of seismic acquisition. Preservation of data quality and ease of implementation are the ultimate constraints on how far any simultaneous source technique can be pushed in terms of efficiency and cost savings.The distance separated simultaneous sweeping (DSSS or DS 3 ) vibroseis technique, introduced by Bouska (2008, 2009), holds the promise of significant acquisition efficiency increases, without compromising data quality and without the requirement for additional processing procedures, or complicated field operations.Standard, (non-simultaneous source), 3D vibroseis acquisition productivity has increased by more than a factor of *

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Section: E X I S T I N G S I M U L T a N E O U S S O U R C E T E C H mentioning

confidence: 99%

Section: Figure 10mentioning

confidence: 99%

Section: Existing Simultaneous Source Techniquesmentioning

confidence: 99%

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Distance separated simultaneous sweeping, for fast, clean, vibroseis acquisition

Bouska¹

2009

Geophysical Prospecting

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“…Several works in the seismic imaging literature have explored the concept of simultaneous or blended source activation to account for this situation (Beasley, Chambers and Jiang 1998;de Kok and Gillespie 2002;Beasley 2008;Berkhout 2008;Hampson, Stefani and Herkenhoff 2008). When sources are fired simultaneously, the main issue is the resulting interference between the responses of the different sources that makes it difficult to estimate interference-free shot gathers.…”

Section: Introductionmentioning

confidence: 99%

Randomized marine acquisition with compressive sampling matrices

Mansour

Wason

Lin

et al. 2012

Geophysical Prospecting

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Seismic data acquisition in marine environments is a costly process that calls for the adoption of simultaneous‐source or randomized acquisition ‐ an emerging technology that is stimulating both geophysical research and commercial efforts. Simultaneous marine acquisition calls for the development of a new set of design principles and post‐processing tools. In this paper, we discuss the properties of a specific class of randomized simultaneous acquisition matrices and demonstrate that sparsity‐promoting recovery improves the quality of reconstructed seismic data volumes. We propose a practical randomized marine acquisition scheme where the sequential sources fire airguns at only randomly time‐dithered instances. We demonstrate that the recovery using sparse approximation from random time‐dithering with a single source approaches the recovery from simultaneous‐source acquisition with multiple sources. Established findings from the field of compressive sensing indicate that the choice of the sparsifying transform that is incoherent with the compressive sampling matrix can significantly impact the reconstruction quality. Leveraging these findings, we then demonstrate that the compressive sampling matrix resulting from our proposed sampling scheme is incoherent with the curvelet transform. The combined measurement matrix exhibits better isometry properties than other transform bases such as a non‐localized multidimensional Fourier transform. We illustrate our results with simulations of ‘ideal’ simultaneous‐source marine acquisition, which dithers both in time and space, compared with periodic and randomized time‐dithering.

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“…Constrained by the Nyquist sampling rate, the increasing sizes of these already massive data volumes pose a fundamental shortcoming in the traditional sampling paradigm and make large area acquisition particularly expensive. Several works in the seismic acquisition literature have explored the concept of simultaneous or blended source activation to account for this situation (Beasley et al, 1998;de Kok and Gillespie, 2002;Beasley, 2008;Berkhout, 2008;Hampson et al, 2008). For simultaneous-source acquisition, the challenge is to estimate interference-free shot gathers and recover subtle late reflections that can be overlaid by interfering seismic responses from other shots.…”

Section: Introductionmentioning

confidence: 99%

Only Dither - Efficient Simultaneous Marine Acquisition

Wason¹,

Herrmann²

2012

Proceedings

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We introduce a strategy for beyond-alias interpolation of seismic data using singular spectrum analysis. First, in the frequency-space (f-x) domain, a Hankel matrix is built from the spatial samples of the low frequencies. To perform interpolation at each specific frequency, the spatial samples are interlaced with zero samples. Then, another Hankel matrix is built form the zero-interlaced vector of data in a given frequency. Next, the rank-reduced eigenstate of the Hankel matrix at low frequencies is used for beyond-alias conditioning of the Hankel matrix at given frequency. Finally, an anti-diagonal summation of the conditioned Hankel matrix gives the final interpolated data. Synthetic and real data examples are provided to examine the performance of the proposed interpolation method.

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A Universal Simultaneous Shooting Technique

Cited by 18 publications

References 0 publications

Distance separated simultaneous sweeping, for fast, clean, vibroseis acquisition

Distance separated simultaneous sweeping, for fast, clean, vibroseis acquisition

Randomized marine acquisition with compressive sampling matrices

Only Dither - Efficient Simultaneous Marine Acquisition

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