Dual‐sensor streamer data: Calibration, acquisition QC and attenuation of seismic interferences and other noises

Cambois, Guillaume; Carlson, David; Jones, Craig; Lesnes, M.; Söllner, Walter; Tabti, H.

doi:10.1190/1.3255117

Cited by 20 publications

(12 citation statements)

References 7 publications

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“…Морская сейсмическая коса, изготовленная по технологии GeoStreamer®, внешне ничем не отлича-ется от обычной, однако ее "начинка" принципиаль-но иная [Cambois et al, 2009;Day et al, 2013]. В ней по всей длине распределены многочисленные гидро-фоны и геофоны, что позволяет реализовать принцип подавления волны-спутника от свободной поверхнос-ти (см.…”

Section: таблица 1 технические характеристики основных методов широкоunclassified

Competing technologies in broadband marine seismic

2015

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Section: таблица 1 технические характеристики основных методов широкоunclassified

Competing technologies in broadband marine seismic

2015

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“…These new systems could represent a breakthrough in the way we process and image seismic data. Geophysical techniques that primarily focus on data-domain processing of such data have already been proposed for improved noise attenuation (Cambois et al, 2009), signal reconstruction , 3D deghosting (Özbek et al, 2010), or multiple attenuation (Frijlink et al, 2011). Novel imaging techniques that better honor the physics of wave propagation through the use of multicomponent data are emerging.…”

Section: Introductionmentioning

confidence: 98%

“…Recent advances in seismic streamer technology allow for the acquisition of vector-acoustic (VA) measurements by means of devices that record pressure and multicomponent (e.g., vertical and crossline) particle velocity or acceleration Cambois et al, 2009). These new systems could represent a breakthrough in the way we process and image seismic data.…”

Section: Introductionmentioning

confidence: 99%

Vector-acoustic reverse time migration of Volve ocean-bottom cable data set without up/down decomposed wavefields

et al. 2015

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Methods for wavefield injection are commonly used to extrapolate seismic data in reverse time migration (RTM). Injecting a single component of the acoustic field, for example, pressure, leads to ambiguity in the direction of propagation. Each recorded wavefront is propagated both upward and downward, and spurious (or ghost) reflectors are created alongside real reflectors in the subsurface image. Thus, wavefield separation based on the combination of pressure and particle velocity data is generally performed prior to imaging to extract only the upgoing field from multicomponent seabed or towed marine seismic recordings. By instead combining vector-acoustic (VA) data with monopoleand dipole-type propagators in the extrapolation of shot or receiver gathers, we show that wavefield separation (or deghosting) can instead be performed "on-the-fly" at limited additional cost. This strategy was successfully applied to a line of a North Sea ocean-bottom cable data set, acquired over the Volve field. We then evaluate additional advantages over standard RTM with decomposed fields such as improved handling of the directivity information contained in the acquired VA data for clearer shallow sections and better focused space-lag common image gathers, and imaging of the downgoing component without the need for additional finite-difference modeling via mirror migration. Finally, we prove the robustness of our method with respect to sparse and irregular receiver sampling.

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“…In recent years, acquisition technology has seen rapid improvements with the introduction of dual-field acoustic systems. Initially deployed as a combination of pressure sensors with single component (vertical) velocity/acceleration measurements (Cambois et al, 2009) or vertical derivatives of pressure from "over-under" acquisition, seismic streamer technology is now able to combine pressure and multicomponent gradient/acceleration observations (Robertsson et al, 2008;Vassallo et al, 2010). In parallel to sensor technology, dual-source technology now combines pressure with gradient/ dipole marine sources (Robertsson et al, 2012).…”

Section: Introductionmentioning

confidence: 98%

Source-receiver, reverse-time imaging of dual-source, vector-acoustic seismic data

Vasconcelos

2013

GEOPHYSICS

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Novel technologies in seismic data acquisition allow for recording full vector-acoustic (VA) data: pointwise recordings of pressure and its multicomponent gradient, excited by pressure only as well as dipole/gradient sources. Building on recent connections between imaging and seismic interferometry, we present a wave-equation-based, nonlinear, reverse-time imaging approach that takes full advantage of dual-source multicomponent data. The method's formulation relies on source-receiver scattering reciprocity, thus making proper use of VA fields in the wavefield extrapolation and imaging condition steps in a self-consistent manner. The VA imaging method is capable of simultaneously focusing energy from all in-and outgoing waves: The receiver-side up-and downgoing (receiver ghosts) fields are handled by the VA receiver extrapolation, whereas source-side in-and outgoing (source ghosts) arrivals are accounted for when combining dual-source data at the imaging condition. Additionally, VA imaging handles image amplitudes better than conventional reverse-time migration because it properly handles finite-aperture directivity directly from dual-source, 4C data. For nonlinear imaging, we provide a complete source-receiver framework that relies only on surface integrals, thus being computationally applicable to practical problems. The nonlinear image can be implicitly interpreted as a superposition of several nonlinear interactions between scattering components of data with those corresponding to the extrapolators (i.e., to the model). We demonstrate various features of the method using synthetic examples with complex subsurface features. The numerical results show, e.g., that the dual-source, VA image retrieves subsurface features with "super-resolution", i.e., with resolution higher than the limits of Born imaging, but at the cost of introducing image artifacts not present in the linear image. Although the method does not require any deghosting as a preprocessing step, it can use separated up-and downgoing fields to generate independent subsurface images.

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Dual‐sensor streamer data: Calibration, acquisition QC and attenuation of seismic interferences and other noises

Cited by 20 publications

References 7 publications

Competing technologies in broadband marine seismic

Competing technologies in broadband marine seismic

Vector-acoustic reverse time migration of Volve ocean-bottom cable data set without up/down decomposed wavefields

Source-receiver, reverse-time imaging of dual-source, vector-acoustic seismic data

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