Results 151 to 160 of about 1,052 (200)

Probabilistic Approach to Seismic Waveform Inversion

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2007, 2007
Elastic waves carry substantial information about the characteristics of the medium they propagate in. However, most of the current methods which use elastic waves for engineering evaluations, only utilize a limited portion of this information, such as peak return frequency or dispersion curve.
Rambod Hadidi, Nenad Gucunski
openaire   +1 more source

Multiscale seismic waveform inversion

Geophysics, 1995
Abstract Iterative inversion methods have been unsuccessful at inverting seismic data obtained from complicated earth models (e.g. the Marmousi model), the primary difficulty being the presence of numerous local minima in the objective function.
Carey Bunks, Fatimetou M. Saleck, S. Zaleski, G. Chavent   +3 more
openaire   +1 more source

Implementation strategies of the seismic Full Waveform Inversion

2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2017
Full waveform inversion (FWI) is a state-of-the-art method that has been used to estimate parameters of the Earth's subsurface. One of the main drawbacks of the FWI method is its high computational complexity in terms of both time and memory. This occurs because the inversion method is based on the computation of a gradient function that requires the ...
Reynaldo F. Noriega, Ana B. Ramirez, Sergio A. Abreo, Gonzalo R. Arce   +3 more
openaire   +1 more source

Hierarchical approach of seismic full waveform inversion

Numerical Analysis and Applications, 2012
Full waveform inversion (FWI) of seismic traces recorded at the free surface allows the reconstruction of the physical parameters structure on the underlying medium. For such a reconstruction, an optimization problem is defined, where synthetic traces, obtained through numerical techniques as finite-difference or finite-element methods in a given model
Asnaashari, A., Brossier, Romain, Castellanos, C., Dupuy, B., Etienne, V., Gholami, Y., Hu, G., Métivier, Ludovic, Operto, Stéphane, Pageot, D., Prieux, Vincent, Ribodetti, A., Roques, Aurélien, Virieux, Jean   +13 more
openaire   +3 more sources

Vertical seismic profile waveform inversion

Studia Geophysica et Geodaetica, 2015
Waveform inversion of vertical seismic profile (VSP) data is studied in this paper. In this study, finite-difference acoustic wave modelling in the frequency-domain is used for seismic forward modelling and a classical iterative Gauss-Newton algorithm is used for inversion. The inversion algorithm in the frequency-domain allows a multiscale approach in
Navid Amini, Hamed Amini
openaire   +1 more source

Seismic Applications of Full Waveform Inversion

2016
Full waveform inversion (FWI) is a powerful imaging technique which exploits the richness of seismic waveforms. We further developed FWI to obtain multi-parameter images at high resolution. Here, we involve physical parameters, such as velocities and attenuation of seismic waves as well as mass density, which are essential for a reliable petrophysical ...
A. Kurzmann, L. Gaßner, N. Thiel, M. Kunert, R. Shigapov, F. Wittkamp, T. Bohlen, T. Metz   +7 more
openaire   +1 more source

A combined genetic and linear inversion algorithm for seismic waveform inversion

SEG Technical Program Expanded Abstracts 1993, 1993
We combine a genetic algorithm (GA) with a linearized inversion (LI) scheme to develop a new approach to seismic waveform inversion. By incorporating the LI method into GA we intend (i) to overcome the limitations of the knowledge of a good starting model in LI and (ii) to reduce the computational cost of GA.
Milton J. Porsani, Paul L. Stoffa, Mrinal K. Sen, Raghu Chunduru, Warren T. Wood   +4 more
openaire   +1 more source

Receiver-coupling effects in seismic waveform inversions

Geophysics, 2012
ABSTRACT Seismic waveform-inversion offers opportunities for detailed characterization of the subsurface. However, its full potential can only be exploited when any systematic source and receiver effects are either carefully avoided or appropriately accounted for during the inversions. Repeated crosshole measurements in the Mont Terri
Maurer, H., Greenhalgh, S.A., Manukyan, E., Marelli, S., Green, A.G.   +4 more
openaire   +3 more sources

Optimized Experimental Design in the Context of Seismic Full Waveform Inversion and Seismic Waveform Imaging

2017
Abstract During the past few years, significant improvements have been achieved in high-resolution imaging with seismic data. In particular, seismic full waveform inversion (FWI) has been proven to be a very promising tool. However, this technique requires high-quality data, whose acquisition can be very expensive. Furthermore, FWI is computationally
Hansruedi Maurer, André Nuber, Naiara Korta Martiartu, Fabienne Reiser, Christian Boehm, Edgar Manukyan, Cédric Schmelzbach, Andreas Fichtner   +7 more
openaire   +1 more source

Full Waveform Inversion with Blended Seismic Data

12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011, 2011
Full waveform inversion has the potential of playing the central role in seismic imaging in the near future. In fact, its power of providing higher seismic resolution compared to pre-stack depth migration may contribute to seismic interpretation in areas which present highly complex geology. However, for complex geological models the success of seismic
André Bulcão, Djalma Manoel Soares Filho, Gustavo Catão Alves, Luiz Alberto Santos, Túlio do Valle Moreira, Peter van den Berg, Dries Gisolf   +6 more
openaire   +1 more source