Search Results - "Pratt, R. Gerhard"

Waveform tomography imaging of a megasplay fault system in the seismogenic Nankai subduction zone by Kamei, Rie, Pratt, R. Gerhard, Tsuji, Takeshi

“…We apply Frequency-domain Waveform Tomography to form quantitative, high-resolution P-wave velocity images of a megasplay fault system within the central…”
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Misfit functionals in Laplace-Fourier domain waveform inversion, with application to wide-angle ocean bottom seismograph data by Kamei, Rie, Pratt, R. Gerhard, Tsuji, Takeshi

“…ABSTRACT In seismic waveform inversion, non‐linearity and non‐uniqueness require appropriate strategies. We formulate four types of L2 normed misfit…”
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Pore pressure distribution of a mega-splay fault system in the Nankai Trough subduction zone: Insight into up-dip extent of the seismogenic zone by Tsuji, Takeshi, Kamei, Rie, Pratt, R. Gerhard

“…•We predict pore pressure distribution of the mega-splay fault in Nankai Trough.•We apply rock physics theory to high-resolution waveform tomography…”
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Sensitivities of seismic traveltimes and amplitudes in reflection tomography by Wang, Yanghua, Pratt, R. Gerhard

“…Seismic traveltimes and amplitudes in reflection-seismic data show different dependences on the geometry of reflection interfaces, and on the variation of…”
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Waveform-based simulated annealing of crosshole transmission data: a semi-global method for estimating seismic anisotropy by Afanasiev, Michael V., Pratt, R. Gerhard, Kamei, Rie, McDowell, Glenn

“…We successfully apply the semi-global inverse method of simulated annealing to determine the best-fitting 1-D anisotropy model for use in acoustic frequency…”
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Cross‐well seismic waveform tomography for monitoring CO2 injection: a case study from the Ketzin Site, Germany by Zhang, Fengjiao, Juhlin, Christopher, Cosma, Calin, Tryggvason, Ari, Pratt, R. Gerhard

“…SUMMARY Geological storage of CO2 is one means of mitigating the effects of continued burning of fossil fuels for power generation. An important component in…”
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Gauss–Newton and full Newton methods in frequency–space seismic waveform inversion by Pratt, R. Gerhard, Shin, Changsoo, Hick, G. J.

“…By specifying a discrete matrix formulation for the frequency–space modelling problem for linear partial differential equations (‘FDM’ methods), it is possible…”
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Cross-well seismic waveform tomography for monitoring CO2 injection: a case study from the Ketzin Site, Germany: Waveform tomography for CO2 monitoring by Zhang, Fengjiao, Juhlin, Christopher, Cosma, Calin, Tryggvason, Ari, Pratt, R. Gerhard

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Seismic amplitude inversion for interface geometry: practical approach for application by Wang, Yanghua, White, Roy E., Pratt, R. Gerhard

“…This paper presents a practical approach for the application of real seismic amplitude data in the context of reflection seismic tomography. The estimation of…”
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Seismic amplitude inversion for interface geometry of multi-layered structures by YANGHUA WANG, PRATT, R. Gerhard

“…--Seismic amplitude data are used to invert for the geometry of reflection interfaces of multi-layered structures, in which the reflection interface is…”
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Decomposition of structural amplitude effect and AVO attributes: Application to a gas-water contact by YANGHUA WANG, WORTHINGTON, Michael H, PRATT, R. Gerhard

“…--The structural amplitude effect, associated with focusing and defocusing due to the reflector curvature, importantly contributes to reflection seismic…”
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