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EAEG Workshop - Practical Aspects of Seismic Data Inversion
- Conference date: 28 May 1990 - 01 Jun 1990
- Location: Copenhagen, Denmark
- ISBN: 978-90-73781-01-6
- Published: 28 May 1990
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The Marmousi workshop - Introduction
Authors P. Lailly and R. VersteegOne major interest in seismic exploration for oil is to get the ability to correctly identify and localize subsurface structures. This is understandable as inaccurate geometrical description of the geological structure is known as the main cause of failure both in exploration and in reservoir development.
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Marmousi, model and data
Authors A. Brougois, M. Bourget, P. Lailly, M. Poulet, P. Ricarte and R. VersteegIn 1988 a complex 2D model was created and synthetic seismic data were generated from this model. Model and data were designed specifically by the IFP for the blind test of the Copenhagen workshop. This article describes the philosophy bebind the model and the creation of model and data.
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Seismic inversion: one step or many?
By W. WigginsElegant fonnulations of the seismic inversion method have been developed that map the data directly to the underlying physical quantities (a geologic model) in a single step.
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Structural imaging in the real world
More LessSignificant advances in structural imaging/inversion during the last few years have improved our ability to delineate complex structures.
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Desperately seeking Marmousi: starring SG-prestack depth migration and focusing analysis
By F. AudebertWe took advantage of the Mannousi model to explore and check the possibilities of focusing analysis (resulting from S-G prestack depth migration, where S stands for shot and G for geophone), as a tool for determining a "background" velocity model.
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Marmousi-model data set: macro model verification and prestack depth migration
Authors R. Marschall and J. ThiessenOn January 19, 1990 we received the Mannousi-model data and the description of the data set (2-D seismic line, 240 shots with 96 channels each, wells 1504 and 9004).
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Prestack depth migration and macro model estimation
Authors G. Blacquiére and A. W. DuijndamIn case of a complex subsurface structure, the conventional processing based on the concept of the common midpoint stack does no longer yield a satisfactory result.
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The Deplhi approach to macro model estimation
Authors A. J. Berkhout, H. Cox, E. Verschuur and K. WapenaarAt first glance it may appear attractive to aim at one large inversion scheme that transforrns seismic measurements into rock and pore parameters. However, apart from the gigantic computation times involved, the development of one inversion scheme may not be the best way to go!
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Nonlinear waveform inversion of seismic reflection data: The Marmousi Model
Authors M. Noble and A. TarantolaData from 45 shot records from the Marmousi data set collected in a conventional, marine seismic reflection survey are inverted to obtain the subsurface map of the short wavelength variations of the impedances.
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Non-interactive estimation of the Marmousi velocity model by differential semblance optimization: initial trials
By M. W. SymesA subset of the Marmousi data is processed to yield an initial approximation to a kinematic velocity model. The process described is the first step in a gradient iteration scheme for a modified least-squares inversion method. The approach requires no picking or other extensive interaction with the data, and appears to avoid convergence difficulties reported for conventional least-squares inversion.
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Common-offset depth migration as a velocity analysis tool
We imaged the Marmousi dataset using an efficient Kirchhoff prestack depth migration algorithm combined with a layer-stripping velocity analysis technique.
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A Methodology to image tectonically complex areas using Polystack™ and prestack depth migration
Authors M. Barut, E. de Bazelaire, J. Ravat and G. TaveauMannousi data gave us the opportunity to check and control some new processes for the prospection of geologically complex areas.
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The Marmousi experience: synthesis
Authors P. Lailly, F. Rocca and R. VersteegIn the introduction to these proceedings by Lailly and Versteeg the purpose of the Marmousi workshop was discussed.
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