Results 11 to 20 of about 1,052 (200)
A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn
Annals of Glaciology, 2022 The density structure of firn has implications for hydrological and climate modelling and for ice shelf stability. The firn structure can be evaluated from depth models of seismic velocity, widely obtained with Herglotz-Wiechert inversion (HWI), an ...
Emma Pearce +7 more
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Optimal transport for seismic full waveform inversion [PDF]
Communications in Mathematical Sciences, 2016 Full waveform inversion is a successful procedure for determining properties of the earth from surface measurements in seismology. This inverse problem is solved by a PDE constrained optimization where unknown coefficients in a computed wavefield are adjusted to minimize the mismatch with the measured data.
Engquist, Bjorn +2 more
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Source-independent full-waveform inversion of seismic data [PDF]
Geophysics, 2003 Abstract A rigorous full-waveform inversion of seismic data has been a challenging subject, partly because of the lack of precise knowledge of the source. Since currently available approaches involve some form of approximations to the source, inversion results are subject to the quality and choice of the source information used.
Lee, Ki Ha, Kim, Hee Joon
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Envelope-based constrained model for multiparameter pre-stack seismic inversion
Journal of Petroleum Exploration and Production Technology, 2022 Pre-stack seismic inversion is an effective method to estimate multiparameter from seismic reflection data in the oil–gas reservoir exploration. In order to get a reliable inverted parameter result, a constrained model is commonly used to reduce the ...
Junzhen Shan +3 more
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Frontiers in Earth Science, 2022 To better interpret the subsurface structures and characterize the reservoir, a depth model quantifying P-wave velocity together with additional rock’s physical parameters such as density, the S-wave velocity, and anisotropy is always preferred by ...
Zhonghan Liu +2 more
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Full waveform inversion with combined misfit functions and application in land seismic data
Frontiers in Earth Science, 2023 Full waveform inversion reconstructs subsurface structures by matching the synthetic waveform to the observed waveform. Inaccuracy of the source wavelets can, thus, easily lead to an inaccurate model.
Jianyong Song +6 more
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Genetic algorithms in seismic waveform inversion [PDF]
Geophysical Journal International, 1992 SUMMARY Recently a new class of methods, to solve non-linear optimization problems, has generated considerable interest in the field of Artificial Intelligence. These methods, known as genetic algorithms, are able to solve highly non-linear and non-local optimization problems and belong to the class of global optimization techniques, which includes ...
Malcolm Sambridge, Guy Drijkoningen
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Regional-scale joint seismic body- and surface-wave travel time tomography
地球与行星物理论评, 2023 To make full use of seismograms to put tight constraints on the structure of subsurface and earthquake sources has always been the research focus in seismology.
Hongjian Fang +3 more
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Application of seismic sedimentology to the western slope of northern Songliao basin [PDF]
E3S Web of Conferences, 2021 During the sedimentary period of Saertu reservoir on the western slope of the northern Songliao basin, delta front and shore-shallow lake subfacies are mainly developed, which have the characteristics of few sandstone layers and thin single layer ...
Xianwei Ji
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Characterising ice slabs in firn using seismic full waveform inversion, a sensitivity study
Journal of Glaciology, 2023 The density structure of firn has implications for hydrological and climate modelling, and ice-shelf stability. The structure of firn can be evaluated from depth models of seismic velocity, widely obtained with Herglotz–Wiechert inversion (HWI), an ...
Emma Pearce +7 more
doaj +1 more source