Wavelet estimation from marine pressure measurements

Osen, A.; Secrest, Bruce G.; Amundsen, Lasse; Reitan, Arne

doi:10.1190/1.1444504

Cited by 21 publications

(10 citation statements)

References 13 publications

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“…These methods, however, assume that the medium above the recording surface is known and that the wavefield and its normal derivative are measured (Weglein and Secrest, 1990), which is the case only in OBC and dual-sensor towed streamer surveys (Tenghamn et al, 2007). To alleviate the recording of the normal derivative of the wavefield, Osen et al (1998) propose a modification to the method of Weglein and Secrest (1990). This modification, however, introduces the requirement of additional (one or more) recordings above the receiver surface.…”

Section: Introductionmentioning

confidence: 95%

“…Wave-theoretical methods of source signature extraction (Weglein and Secrest, 1990;Osen et al, 1998) are more accurate compared to the other existing methods. A significant advantage of these methods is their ability to extract source array patterns.…”

Section: Introductionmentioning

confidence: 98%

“…This modification, however, introduces the requirement of additional (one or more) recordings above the receiver surface. Moreover, the algorithm of Osen et al (1998) estimates signatures only of point sources; for an array of guns, the method requires knowledge of the locations of the individual guns in addition to mini-streamer recordings above the receiver surface.…”

Section: Introductionmentioning

confidence: 99%

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Virtual Real Source: Source signature estimation using seismic interferometry

Behura

Snieder

2013

GEOPHYSICS

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Knowledge of the seismic source signature is crucial in numerousproblems in exploration seismology, especially in fullwaveform inversion. However, existing methods of source signature estimation like statistical methods and well-log-based methods suffer from several drawbacks arising from assumptions such as whiteness of the reflectivity series and the minimumphase character of the wavelet. Also, estimation of the source signature using wave-theoretical methods requires the recording of the wavefield and its normal derivative or additional recordings above the receiver surface which are not always available. We introduce a method, called the Virtual Real Source, of extracting the source signature based on the theory of seismic interferometry, also known as the virtual source method. This method is independent of the assumptions and drawbacks of the abovementioned methods. The only requirement for the method of

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Virtual Real Source: Source signature estimation using seismic interferometry

Behura

Snieder

2013

GEOPHYSICS

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“…to predict a dual-sensor cable above the receiver-deghosted cable. G DD 0 is constructed to vanish on the air/water boundary and the measurement surface (Morse and Feshbach [1953], p. 812ff; Osen et al, 1998;Tan, 1999;Zhang [2007], p. 20ff). In the ðr; ωÞ domain, Green's theorem now takes the form…”

Section: Source Deghostingmentioning

confidence: 99%

“…where ðx 0 0 g ; z 0 0 g Þ are the observation or prediction coordinates, ðx 0 g ; z 0 g Þ are the receiver coordinates on the receiver-deghosted cable, the air/water boundary is at z 0 g ¼ 0, the input (receiverdeghosted) cable is at z g 0 ¼ b, and we assume β ≡ ðnπ∕bÞ 2 − k 2 > 0 (Osen et al, 1998;Tan, 1999). In 3D,…”

Section: Mayhan and Wegleinmentioning

confidence: 99%

First application of Green's theorem derived source and receiver deghosting on deep water Gulf of Mexico synthetic (SEAM) and field data

Mayhan

Weglein

Terenghi

2012

SEG Technical Program Expanded Abstracts 2012

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Deghosting benefits traditional seismic processing and is a prerequisite to all inverse-scattering-series based processing. The freedom of choosing a convenient reference medium (and associated Green's function) means Green's theorem offers a flexible framework for deriving useful algorithms including deghosting. Among advantages over traditional deghosting methods are: (1) no need for Fourier transforms over receivers and sources, and (2) can accommodate a horizontal or non-horizontal measurement surface, the latter of particular interest for ocean bottom and onshore applications. The theory of Green's theorem-derived deghosting is presented, and its first application on deep-water Gulf of Mexico synthetic (SEAM) and field data is reported. The source and receiver deghosting algorithms work with positive and encouraging results.

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Inverse scattering series and seismic exploration

et al. 2003

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This paper presents an overview and a detailed description of the key logic steps and mathematical-physics framework behind the development of practical algorithms for seismic exploration derived from the inverse scattering series. There are both significant symmetries and critical subtle differences between the forward scattering series construction and the inverse scattering series processing of seismic events. These similarities and differences help explain the efficiency and effectiveness of different inversion objectives. The inverse series performs all of the tasks associated with inversion using the entire wavefield recorded on the measurement surface as input. However, certain terms in the series act as though only one specific task,and no other task, existed. When isolated, these terms constitute a task-specific subseries. We present both the rationale for seeking and methods of identifying uncoupled task-specific subseries that accomplish: (1) free-surface multiple removal; (2) internal multiple attenuation; (3) imaging primaries at depth; and (4) inverting for earth material properties. A combination of forward series analogues and physical intuition is employed to locate those subseries. We show that the sum of the four taskspecific subseries does not correspond to the original inverse series since terms with coupled tasks are never considered or computed. Isolated tasks are accomplished sequentially and, after each is achieved, the problem is restarted as though that isolated task had never existed. This strategy avoids choosing portions of the series, at any stage, that correspond to a combination of tasks,i.e.,

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Wavelet estimation from marine pressure measurements

Cited by 21 publications

References 13 publications

Virtual Real Source: Source signature estimation using seismic interferometry

Virtual Real Source: Source signature estimation using seismic interferometry

First application of Green's theorem derived source and receiver deghosting on deep water Gulf of Mexico synthetic (SEAM) and field data

Inverse scattering series and seismic exploration

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