Seismic Repeatability – Is There a Limit?

Schisselé, E.; Forgues, Éric; Echappé, J.; Meunier, J.; Pellegars, O. de; Hubans, C.

doi:10.3997/2214-4609.201400421

Cited by 28 publications

(12 citation statements)

References 3 publications

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“…For that reason, it is preferred to use buried sources and receivers to avoid the seasonally varying near surface (Schisselé et al 2009), which can mask the true reservoir time-lapse signal. For that reason, it is preferred to use buried sources and receivers to avoid the seasonally varying near surface (Schisselé et al 2009), which can mask the true reservoir time-lapse signal.…”

Section: Introductionmentioning

confidence: 99%

Field trial of seismic recording using distributed acoustic sensing with broadside sensitive fibre‐optic cables

Hornman

2016

Geophysical Prospecting

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Distributed acoustic sensing is an emerging technology using fibre‐optic cables to detect acoustic disturbances such as flow noise and seismic signals. The technology has been applied successfully in hydraulic fracture monitoring and vertical seismic profiling. One of the limitations of distributed acoustic sensing for seismic recording is that the conventional straight fibres do not have broadside sensitivity and therefore cannot be used in configurations where the raypaths are essentially orthogonal to the fibre‐optic cable, such as seismic reflection methods from the surface. The helically wound cable was designed to have broadside sensitivity. In this paper, a field trial is described to validate in a qualitative sense the theoretically predicted angle‐dependent response of a helically wound cable. P‐waves were measured with a helically wound cable as a function of the angle of incidence in a shallow horizontal borehole and compared with measurements with a co‐located streamer. The results show a similar behaviour as a function of the angle of incidence as the theory. This demonstrates the possibility of using distributed acoustic sensing with a helically wound cable as a seismic detection system with a horizontal cable near the surface. The helically wound cable does not have any active parts and can be made as a slim cable with a diameter of a few centimetres. For that reason, distributed acoustic sensing with a helically wound cable is a potential low‐cost option for permanent seismic monitoring on land.

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Section: Introductionmentioning

confidence: 99%

Field trial of seismic recording using distributed acoustic sensing with broadside sensitive fibre‐optic cables

Hornman

2016

Geophysical Prospecting

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“…Earlier work by Pullin et al (1987) showed that acquiring seismic by burying geophones 10 m below the surface result in high signal-to-noise ratio data compared to seismic data recorded from surface. More recently, Schissele et al (2009) and Bakulin et al (2012) presented tests of land acquisition where sources and/or receivers are buried below the weathering zone. In the case presented by Schissele et al (2009), the best repeatability was obtained by burying both sources and receivers below the weathering zone.…”

Section: Acquisition Repeatabilitymentioning

confidence: 99%

“…More recently, Schissele et al (2009) and Bakulin et al (2012) presented tests of land acquisition where sources and/or receivers are buried below the weathering zone. In the case presented by Schissele et al (2009), the best repeatability was obtained by burying both sources and receivers below the weathering zone. The feasibility test presented by Bakulin et al (2012) demonstrated that burying receivers below the weathering zone and using surface sources significantly improved time-lapse repeatability.…”

Section: Acquisition Repeatabilitymentioning

confidence: 99%

Surface-consistent matching filters for time-lapse processing

Almutlaq

Margrave

2012

SEG Technical Program Expanded Abstracts 2012

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The problem of mismatch between repeated time-lapse seismic surveys remains a challenge, particularly for land acquisition. In this dissertation, we present a new algorithm, which is an extension of the surface-consistent model, and which minimizes the mismatch between surveys, hence improving repeatability.We introduce the concept of surface-consistent matching filters (SCMF) for processing time-lapse seismic data, where matching filters are convolutional filters that minimize the sum-squared error between two signals. Since in the Fourier domain, a matching filter is the spectral ratio of the two signals, we extend the well known surface-consistent hypothesis such that the data term is a trace-by-trace spectral ratio of two datasets instead of only one (i.e. surface-consistent deconvolution). To avoid unstable division of spectra, we compute the spectral ratios in the time domain by first designing tracesequential, least-squares matching filters, then Fourier transforming them. A subsequent least-squares solution then factors the trace-sequential matching filters into four operators: two surface-consistent (source and receiver), and two subsurface-consistent (offset and midpoint).We apply the algorithm to two datasets: a synthetic time-lapse model and field data from a CO 2 monitoring site in Northern Alberta. In addition, two common time-lapse processing schemes (independent processing and simultaneous processing) are compared.We present a modification of the simultaneous processing scheme as a direct result of applying the new SCMF algorithm. The results of applying the SCMF together with the new modified simultaneous processing flow reveal the potential benefit of the method, however some challenges remain, specifically in the presence of random noise.i

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“…Figure 17b measurements was estimated at less than 10 μs for a buried source and buried receivers (Schissele et al, 2009).…”

Section: Saint-clair-sur-epte (2002-2004)mentioning

confidence: 99%

Natural Gas Storage Seismic Monitoring

Mari

Huguet

Meunier

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Suivi sismique des stockages de gaz naturel -IFP Energies nouvelles, la CGGVeritas et GDF Suez ont mené ensemble, depuis 1980, de nombreuses expériences de monitoring sismique afin de détecter et de suivre les mouvements du gaz dans des stockages géologiques de gaz naturel. Des acquisitions ont été réalisées à différents stades de la vie du stockage tant en sismique de surface qu'en sismique de puits. Des antennes de récepteurs permanentes ont été construites et implantées dans des puits. Des sources permanentes ont été conçues et utilisées de façon continue pendant plusieurs années pour suivre le cycle remplissage/extraction du stockage. Les dispositifs permanents ont permis d'améliorer la précision des mesures de temps d'arrivée jusqu'au dixième de milliseconde. L'arrivée de gaz dans un aquifère se traduit par une rapide variation de vitesse, qui a un impact à la fois sur les temps d'arrivée des réflexions sous les réservoirs et sur les amplitudes aux limites du réservoir. Les mouvements ultérieurs du contact gaz/eau avec le cycle de remplissage/soutirage sont plus difficiles à suivre et nécessitent une excellente précision des mesures de temps d'arrivée des réflexions. L'inversion de ces mesures pour l'estimation des saturations en gaz et en eau est délicate. Cette inversion a été tentée, avec un certain succès, dans le cas de Céré-la-Ronde. Du fait de la densité du dioxyde de carbone, au-delà d'une profondeur de 800 mètres environ, cette inversion risque d'être encore plus délicate pour les stockages de CO 2 que pour les stockages de gaz naturel. Abstract -Natural Gas Storage Seismic Monitoring -IFP Energies nouvelles, CGGVeritas and GDF Suez have conducted together, since 1980, a series of seismic monitoring experiments in order to detect and follow the movements of the gas plume in natural gas

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Seismic Repeatability – Is There a Limit?

Cited by 28 publications

References 3 publications

Field trial of seismic recording using distributed acoustic sensing with broadside sensitive fibre‐optic cables

Field trial of seismic recording using distributed acoustic sensing with broadside sensitive fibre‐optic cables

Surface-consistent matching filters for time-lapse processing

Natural Gas Storage Seismic Monitoring

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