Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Jörg Schleicher"'
Publikováno v:
International Journal of Geophysics, Vol 2011 (2011)
Three-dimensional wave-equation migration techniques are still quite expensive because of the huge matrices that need to be inverted. Several techniques have been proposed to reduce this cost by splitting the full 3D problem into a sequence of 2D pro
Externí odkaz:
https://doaj.org/article/e966f1f4ca1444bb91f9ec9c23c8ef72
Publikováno v:
GEOPHYSICS. 88:S1-S16
The inverse-scattering imaging condition (ISIC) for reverse time migration (RTM) aims at recovering amplitudes proportional to seismic reflectivity. It has been derived as the high-frequency asymptotic inverse of Born modeling, which justifies its be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c570277db3e313050a9410e57ff9a796
https://doi.org/10.1190/geo2021-0698.1
https://doi.org/10.1190/geo2021-0698.1
Autor:
C. A. M. Assis, Jörg Schleicher
Publikováno v:
GEOPHYSICS. 86:R777-R793
Joint migration inversion (JMI) is a method based on one-way wave equations that aims at fitting seismic reflection data to estimate an image and a background velocity. The depth-migrated image describes the high spatial-frequency content of the subs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f9d969406c51732f69ae5bb27d6267c
https://doi.org/10.1190/geo2020-0730.1
https://doi.org/10.1190/geo2020-0730.1
Publikováno v:
Brazilian Journal of Geophysics. 40
The numerical simulation of wave propagation can be represented by a propagator matrix applied to previous instances of the wavefield. Using the sparsity of the propagator matrix to approximate it by a low-rank representation, one can increment the w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00d11772bc234446ef21bdee7792488e
https://doi.org/10.22564/brjg.v40i5.2143
https://doi.org/10.22564/brjg.v40i5.2143
Publikováno v:
GEOPHYSICS. 86:T337-T348
We have developed a procedure to derive low-rank evolution operators in the mixed space-wavenumber domain for modeling the qP Born-scattered wavefield at perturbations of an anisotropic medium under the pseudoacoustic approximation. To approximate th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14022754d72c441bade17b7979b94329
https://doi.org/10.1190/geo2020-0764.1
https://doi.org/10.1190/geo2020-0764.1
Publikováno v:
GEOPHYSICS. 84:N15-N27
Acoustic impedance (AI) is a widely used seismic attribute in stratigraphic interpretation. Because of the frequency-band-limited nature of seismic data, seismic amplitude inversion cannot determine AI itself, but it can only provide an estimate of i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee7e526268d0f22ac14439b0dcb67779
https://doi.org/10.1190/geo2018-0185.1
https://doi.org/10.1190/geo2018-0185.1
Autor:
Jörg Schleicher, C. A. M. Assis
Publikováno v:
EAGE 2020 Annual Conference & Exhibition Online.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7480e6e2f6f496be34b5e6eb2b2d5b7
https://doi.org/10.3997/2214-4609.202011971
https://doi.org/10.3997/2214-4609.202011971
Autor:
Jessé C. Costa, Jörg Schleicher, Martin Schimmel, Walter E. Medeiros, Flavio Lemos de Santana
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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instname
Additional information regarding the continuity and resolution of selected seismic reflectors in reverse time migration (RTM) images can be beneficial for seismic interpretation. We have developed and evaluated new imaging conditions for RTM based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2da3c116f25f1ef3a1d79be5229fdac1
https://doi.org/10.1190/geo2017-0791.1
https://doi.org/10.1190/geo2017-0791.1
Publikováno v:
GEOPHYSICS. 82:S259-S269
Complex Padé Fourier finite-difference migration is a stable one-way wave-equation technique that allows for better treatment of evanescent modes than its real counterpart, in this way producing fewer artifacts. As for real Fourier finite-difference
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57e4b5ecac5d4e6c977fd480f3812caf
https://doi.org/10.1190/geo2016-0324.1
https://doi.org/10.1190/geo2016-0324.1
Autor:
Jörg Schleicher, Francisco de S. Oliveira, Iury Araújo, José J. S. de Figueiredo, Andrei G. Oliveira
Publikováno v:
GEOPHYSICS. 82:N1-N12
Quality factor estimation and correction are necessary to compensate the seismic energy dissipated during acoustic-/elastic-wave propagation in the earth. In this process, known as [Formula: see text]-filtering in the realm of seismic processing, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::244d3d0c08298158ae0d8b8057cea3ca
https://doi.org/10.1190/geo2015-0234.1
https://doi.org/10.1190/geo2015-0234.1