Velocity model estimation with data‐derived wavefront attributes

Duveneck, Eric

doi:10.1190/1.1649394

Cited by 149 publications

(92 citation statements)

References 34 publications

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“…It provides simulated ZO sections and data-derived wavefield attributes, also called CRS parameters. These parameters offer several important subsequent seismic applications, e.g., macro velocity model building by reflection tomography, improved multiple suppression and geometrical spreading correction (e.g., Duveneck 2004;Zaske et al 1999;Vieth 2001;Höcht 2002). In the CRS stack the local dip of the structures is automatically taken into account and does not require any particular dip moveout processing.…”

Section: The Common Reflection Surface Stack Methodsmentioning

confidence: 99%

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New insights into the crustal structure of the North German Basin from reprocessing of seismic reflection data using the Common Reflection Surface stack

Yoon

Baykulov

Dümmong

et al. 2007

Int J Earth Sci (Geol Rundsch)

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The influence of deep crustal processes on basin formation and evolution and its relation to current morphology is not well understood yet. A key feature to unravel these issues is a detailed seismic image of the crust. A part of the data recorded by the hydrocarbon industry in the late 1970s and 1980s in the North German Basin were released to the public recently. The seismic reflection data were recorded down to 15 s two-way travel time. The mean Common Midpoint fold of about 20 is relatively low compared to contemporary seismic acquisitions. The processing of the 1980s focussed on the sedimentary structures to explore the hydrocarbon potential of this area. We applied the Common Reflection Surface stack technique to the data sets, which is well suited for low-fold data. The reprocessing was focussed on the imaging of the subsedimentary crustal range. The reprocessed images show enhanced reflections, especially in the mid and lower crustal part. Also, the image of the salt structures in the graben area was improved. Furthermore, the reprocessed images indicate an almost flat Moho topography in the area of the Glückstadt Graben and an additional lower crustal structure, which can be correlated with a high-density body found in recent gravity modeling studies.

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Section: The Common Reflection Surface Stack Methodsmentioning

confidence: 99%

“…These parameters are related to the location, orientation and local curvature of curved interfaces in the subsurface (Mann et al 1999). These parameters can be used for subsequent processing, e.g., velocity model inversion and multiple suppression (e.g., Zaske et al 1999;Duveneck 2004).…”

Section: Introductionmentioning

confidence: 99%

New insights into the crustal structure of the North German Basin from reprocessing of seismic reflection data using the Common Reflection Surface stack

Yoon

Baykulov

Dümmong

et al. 2007

Int J Earth Sci (Geol Rundsch)

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“…12 The CDP gathers of the real data a before noise attenuation and b after pre-processing steps; data ready for the CRS and the FO-CDS stacking methods sections were used as input for the post stack Kirchhoff depth imaging. The migration velocity model obtained by the NIP tomography method which was introduced by Duveneck (2004). The velocity model is shown in Fig.…”

Section: Real Land Data Examplementioning

confidence: 99%

Seismic image enhancement in post stack depth migration by finite offset CDS stack method

Soleimani

Balarostaghi

2016

J Petrol Explor Prod Technol

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Seismic imaging in complex geological structures such as thrust belts and areas with complex geological structures is affected by several factors that often lead to poor-quality final result. Usually such structures produce locally very steep dips, strong lateral variations in velocity and abrupt truncation of the reflectors. Common reflection surface stack is a macro velocity model independent method that is introduced for seismic imaging in complex media. However, this method has some drawbacks in imaging of low-quality data from complex structures. Many improvements to this method have been introduced in several researches to overcome this drawback. However, the problem of conflicting dips situation is still a problematic issue in this method. In this study, a new method, called finite offset common diffraction surface (FO-CDS) stack, is introduced to overcome this problem and remove some geological interpretation ambiguities in seismic sections. This method is based on improving the CDS stack operator, with the idea of partial common reflection surface stack. This modification will enhance the quality of the final seismic image, where it suffers from conflicting dips problem and low signal to noise ratio. The new idea is to change the operator of the CDS equation into a finite offset mode in different steps for each sample. Subsequently, a time-variant linear function is designed for each sample to define the offset range using FO-CDS operator. The width of this function is designed according to the Fresnel zone. The new operator was applied on a synthetic and a real low fold land data. Results show the ability of the new method in enhancing the quality of the stacked section in the presence of faults and conflicting dips.

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“…Note that, by retrieving the sparsest source (reflections), the BSS method was able to provide a section that is almost free of diffractions, which contrasts with the stacked section obtained by the CRS. This result would be particularly interesting in the context of Normal-incidentpoint (NIP) tomography, since the input data to the inversion processing is obtained by picking a set of reflection events (Duveneck, 2004). …”

Section: Example With Synthetic Datamentioning

confidence: 99%

“…A particular application of the CRS parameters is the so-called Normal-Incidence-Point (NIP) tomography (Duveneck, 2004).…”

Section: Introductionmentioning

confidence: 99%

Separation of Reflection from Diffraction Events via the CRS Technique and a Blind Source Separation Method based on Sparsity Maximization

Duarte

Lopes

Faccipieri

et al. 2013

13th International Congress of the Brazilian Geophysical Society &Amp; EXPOGEF, Rio De Janeiro, Brazil, 26–29 August 2013

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Recent work has shown that, besides providing a conventional stacked section in which reflections are enhanced, the Common-Reflection-Surface (CRS) stacking method may be used to obtain a stacked section mainly composed of diffraction events. Therefore, CRS can be applied to separate reflection and diffraction events in the resulting zero-offset (ZO) sections. However, in practice, there is still mutual interference in the sections obtained by the stacking process.To improve the quality of separation, we propose an additional step based on a signal processing framework known as blind source separation (BSS). The adopted BSS method relies on the concept of sparsity, which suits well the overall characteristic of the reflection events. Numerical experiments with synthetic and field data show that the proposed additional step leads to better results with respect to the stacked section generated by CRS.

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Velocity model estimation with data‐derived wavefront attributes

Cited by 149 publications

References 34 publications

New insights into the crustal structure of the North German Basin from reprocessing of seismic reflection data using the Common Reflection Surface stack

New insights into the crustal structure of the North German Basin from reprocessing of seismic reflection data using the Common Reflection Surface stack

Seismic image enhancement in post stack depth migration by finite offset CDS stack method

Separation of Reflection from Diffraction Events via the CRS Technique and a Blind Source Separation Method based on Sparsity Maximization

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